Zvonimir Matusinovic - Academia.edu (original) (raw)
Papers by Zvonimir Matusinovic
Polimeri : časopis za plastiku i gumu, 2012
Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2... more Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) was prepared by a variation of the rehydration method, by adding benzoic acid and CaO into a mixture of water and acetone used to convert tricalcium aluminate (Ca 3 Al 2 O 6) into fi nal layered structure. Intercalation of benzoate anions within LDH layers was confi rmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Intercalated nanocomposites based on an epoxy resin and LDH-B were prepared by in situ polymerisation, with poly(oxypropylene) diamine as a curing agent. Nanocomposites prepared with different contents of LDH-B (5, 10 and 15 phr) were characterised by XRD, FTIR, TGA, differential scanning calorimetry and transmission electron microscopy (TEM). The XRD results indicated formation of intercalated nanocomposites, and TEM analysis confi rmed that LDH-B was dispersed within the matrix forming an intercalated structure, which becomes partially exfoliated in the nanocomposite with 5 phr fi ller. Results of thermal analysis showed detrimental infl uence on initial degradation temperature in comparison to the neat crosslinked epoxy, while residue at 1,000°C increases, especially for the partially exfoliated nanocomposite. The glass transition temperature decreases in comparison with the neat crosslinked epoxy, indicating poorer crosslinking of the epoxy matrix. KEY WORDS: epoxy resin intercalated nanocomposite layered double hydroxide (LDH) morphology thermal properties KLJUČNE RIJEČI: epoksidna smola interkalirani nanokompozit morfologija slojeviti hidroksidi (LDH) toplinska svojstva Toplinska svojstva interkaliranih nanokompozita na osnovi epoksidne smole i slojevitog hidroksida Sažetak Pripravljen je Ca-Al slojeviti hidroksid (LDH) modifi ciran benzoatnim anionima (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) modifi ciranom metodom rehidratacije, tj. dodavanjem benzojeve kiseline i CaO u smjesu vode i acetona, kojom se trikalcijev aluminat (Ca 3 Al 2 O 6) pretvara u konačni slojeviti hidroksid. Interkalacija benzoatnih aniona unutar LDH slojeva potvrđena je rendgenskom difrakcijom (XRD), spektroskopijom u infracrvenom području (FTIR) i termogravimetrijskom analizom (TGA). Interkalirani nanokompoziti na osnovi epoksidne smole i LDH-B pripravljeni su in situ polimerizacijom, uz polioksipropilen diamin kao umreživalo. Uzorci s različitim udjelom LDH-B (5, 10 i 15 phr) ispitivani su XRD-om, FTIR-om, TGA-om, razlikovnom pretražnom kalorimetrijom i transmisijskom elektronskom mikroskopijom (TEM). Rendgenska difrakcija pokazala je nastajanje interkaliranih nanokompozita, a TEM analiza potvrdila raspršenje LDH-B unutar matrice i nastajanje interkalirane strukture, uz djelomično raslojavanje u nanokompozitu s 5 phr punila. Toplinska analiza pokazala je smanjenje početne temperature degradacije u usporedbi s nemodifi ciranim epoksidnim polimerom, dok se ostatak pri 1000 °C povećao, posebice kod djelomično raslojenog nanokompozita. Staklište se snizuje u usporedbi s nemodificiranim epoksidnim polimerom, što upućuje na slabije umreživanje epoksidne matrice.
2022 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
VI. susret mladih kemijskih inženjera, 2006
Exfoliated polystyrene nanocomposites have been synthesized by in situ bulk multistep polymerizat... more Exfoliated polystyrene nanocomposites have been synthesized by in situ bulk multistep polymerization of polystyrene (PS) in the presence of the filler. The filler was layered double hydroxide (LDH) – tetracalcium aluminate hydrate, modified by the intercalation of benzoate anions (Ca4Al2(OH)12(C6H5COO)2• xH2O). Benzoate anions were found to increase the interlayer distance of the original filler. At the same time, the organophilicity of the filler was increased. The LDH was prepared using a variant of the rehydration method. The PS/LDH composites were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM) methods. XRD and TGA results pointed to the successful incorporation of the filler within the polymer matrix. However, XRD results indicated that a characteristic layered structure of the filler had disappeared, i.e. the delamination had occurred. The ...
Anorganska se punila ugrađuju u polimernu matricu radi poboljsanja svojstava matrice. Svojstva na... more Anorganska se punila ugrađuju u polimernu matricu radi poboljsanja svojstava matrice. Svojstva nastaloga kompozitnog materijala u velikoj mjeri ovise ne samo o svojstvima punila i polimera, nego i o kvaliteti dodira i svojstvima granice faza polimer/punilo. Posebice velika dodirna povrsina ostvaruje se uporabom punila manje velicine cestica. Granicni su primjer tzv. nanokompozitni materijali, punjeni cesticama nanometarske velicine. Prakticnu poteskocu predstavlja kvalitetno umjesavanje, dispergiranje, nanocestica u plastomernu matricu zbog kohezije nanoprasaka i nekompatibilnosti organske i anorganske faze. Stoga je u ovom radu primijenjena metoda in situ polimerizacije, pri kojoj se punilo mijesa s monomerom, a polimerizacija se inicira nakon umjesavanja. Kao potencijalno nanopunilo za polistiren, poli(metil-metakrilat) i njihove kopolimere pripravljen je Ca4Al2(OH)12(C6H5COO)2´H2O (tetrakalcijaluminat hidrat modificiran benzoatnim anionima, CABZ) iz razreda anorganskih faza sloje...
Sigurnost, 2019
Ovim radom opisuju se vrste potencijalnih opasnosti od požara i/ili eksplozije te načini raščlanj... more Ovim radom opisuju se vrste potencijalnih opasnosti od požara i/ili eksplozije te načini raščlanjivanja i prosuđivanja mogućih ugroženosti ili razine rizika od tih opasnosti pri obavljanju fizioterapeutske djelatnosti. Posebna pozornost posvećena je predočavanju znakovitih uzroka požara i eksplozija, te svih praktičnih izvora energije paljenja. U radu je prikazan pregled vrsta i obilježja zapaljivosti požarno i eksplozijski potencijalno opasnih tvoriva i tvari, držanih ili rabljenih u sklopu svih prostora ustanova u kojima se provodi fizioterapeutska djelatnost. Radom su prikazani neki lako mogući uzroci nastanka požara i/ili eksplozije u sklopu takvih prostora zbog nepoštovanja tehničkih smjernica, preporuka i zakonskih propisa s ciljem da se iskoriste spoznaje o uočenim rizicima kako bi se oni smanjili na najmanju moguću mjeru.
Polimeri Casopis Za Plastiku I Gumu, Feb 27, 2013
Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2... more Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) was prepared by a variation of the rehydration method, by adding benzoic acid and CaO into a mixture of water and acetone used to convert tricalcium aluminate (Ca 3 Al 2 O 6) into fi nal layered structure. Intercalation of benzoate anions within LDH layers was confi rmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Intercalated nanocomposites based on an epoxy resin and LDH-B were prepared by in situ polymerisation, with poly(oxypropylene) diamine as a curing agent. Nanocomposites prepared with different contents of LDH-B (5, 10 and 15 phr) were characterised by XRD, FTIR, TGA, differential scanning calorimetry and transmission electron microscopy (TEM). The XRD results indicated formation of intercalated nanocomposites, and TEM analysis confi rmed that LDH-B was dispersed within the matrix forming an intercalated structure, which becomes partially exfoliated in the nanocomposite with 5 phr fi ller. Results of thermal analysis showed detrimental infl uence on initial degradation temperature in comparison to the neat crosslinked epoxy, while residue at 1,000°C increases, especially for the partially exfoliated nanocomposite. The glass transition temperature decreases in comparison with the neat crosslinked epoxy, indicating poorer crosslinking of the epoxy matrix. KEY WORDS: epoxy resin intercalated nanocomposite layered double hydroxide (LDH) morphology thermal properties KLJUČNE RIJEČI: epoksidna smola interkalirani nanokompozit morfologija slojeviti hidroksidi (LDH) toplinska svojstva Toplinska svojstva interkaliranih nanokompozita na osnovi epoksidne smole i slojevitog hidroksida Sažetak Pripravljen je Ca-Al slojeviti hidroksid (LDH) modifi ciran benzoatnim anionima (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) modifi ciranom metodom rehidratacije, tj. dodavanjem benzojeve kiseline i CaO u smjesu vode i acetona, kojom se trikalcijev aluminat (Ca 3 Al 2 O 6) pretvara u konačni slojeviti hidroksid. Interkalacija benzoatnih aniona unutar LDH slojeva potvrđena je rendgenskom difrakcijom (XRD), spektroskopijom u infracrvenom području (FTIR) i termogravimetrijskom analizom (TGA). Interkalirani nanokompoziti na osnovi epoksidne smole i LDH-B pripravljeni su in situ polimerizacijom, uz polioksipropilen diamin kao umreživalo. Uzorci s različitim udjelom LDH-B (5, 10 i 15 phr) ispitivani su XRD-om, FTIR-om, TGA-om, razlikovnom pretražnom kalorimetrijom i transmisijskom elektronskom mikroskopijom (TEM). Rendgenska difrakcija pokazala je nastajanje interkaliranih nanokompozita, a TEM analiza potvrdila raspršenje LDH-B unutar matrice i nastajanje interkalirane strukture, uz djelomično raslojavanje u nanokompozitu s 5 phr punila. Toplinska analiza pokazala je smanjenje početne temperature degradacije u usporedbi s nemodifi ciranim epoksidnim polimerom, dok se ostatak pri 1000 °C povećao, posebice kod djelomično raslojenog nanokompozita. Staklište se snizuje u usporedbi s nemodificiranim epoksidnim polimerom, što upućuje na slabije umreživanje epoksidne matrice.
Polimeri Casopis Za Plastiku I Gumu, Nov 18, 2008
U posljednjih desetak godina osobitu pozornost privla~e slojeviti hidroksidi (e. layered double h... more U posljednjih desetak godina osobitu pozornost privla~e slojeviti hidroksidi (e. layered double hydroxides, LDH) kao potencijalna nanopunila za polimere. Osnovni anorganski slojevi LDH pozitivno su nabijeni te predstavljaju komplement negativno nabijenim slojevitim silikatima i omogu}uju uvo|enje razli~itih aniona kao modifikatora u strukturu punila. Ve}ina istra`enih slojevitih hidroksida sintetskog je podrijetla i stoga visoke ~isto}e, {to im je prednost u usporedbi s prirodnim punilima. Svojstva slojevitih hidroksida mogu se mijenjati u {irokom rasponu, prikladnim izborom metalnih kationa i protuaniona. Ovaj rad daje pregled novijih istra`ivanja slojevitih hidroksida-nanopunila za polimere, uklju~uju}i postupke priprave i karakterizacije te na~ine ugradnje u polimerne matrice.
U posljednjih desetak godina osobitu pozornost privlače slojeviti hidroksidi (e. layered double h... more U posljednjih desetak godina osobitu pozornost privlače slojeviti hidroksidi (e. layered double hydroxides, LDH) kao potencijalna nanopunila za polimere. Osnovni anorganski slojevi LDH pozitivno su nabijeni te predstavljaju komplement negativno nabijenim slojevitim silikatima i omogućuju uvođenje različitih aniona kao modifikatora u strukturu punila. Ve}ina istraženih slojevitih hidroksida sintetskog je podrijetla i stoga visoke čistoće, što im je prednost u usporedbi s prirodnim punilima. Svojstva slojevitih hidroksida mogu se mijenjati u širokom rasponu, prikladnim izborom metalnih kationa i protuaniona. Ovaj rad daje pregled novijih istraživanja slojevitih hidroksida – nanopunila za polimere, uključujući postupke priprave i karakterizacije te načine ugradnje u polimerne matrice. / Over the past decade, special attention has been paid to layered double hydroxides (LDH) as potential nanofillers for polymers. Basic inorganic layers of LDHs are positively charged; thus they complemen...
Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - ... more Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - usually inorganic - filler. The types of nanofillers are indicated in Fig. 1. Beside wellknown layered silicate fillers, recent attention is attracted to layered double hydroxide fillers (LDH), mainly of synthetic origin. The structure of LDH is based on brucite, or magnesium hydroxide, Mg(OH)2 and is illustrated in Fig. 2. The modification of LDHs is commonly done by organic anions, to increase the original interlayer distance and to improve the organophilicity of the filler, keeping in mind their final application as fillers for, usually hydrophobic, polymer matrices. We have used the modified rehydration procedure for preparing organically modified LDH. The stoichiometric quantities of Ca33Al2O6, CaO and benzoic (B) (or undecenoic (U)) acid were mixed with water and some acetone. After long and vigorous shaking, the precipitated fillers were washed, dried and characterized. X-ray diff...
Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - ... more Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - usually inorganic - filler. The types of nanofillers are indicated in Fig. 1. Beside wellknown layered silicate fillers, recent attention is attracted to layered double hydroxide fillers (LDH), mainly of synthetic origin. The structure of LDH is based on brucite, or magnesium hydroxide, Mg(OH)2 and is illustrated in Fig. 2. The modification of LDHs is commonly done by organic anions, to increase the original interlayer distance and to improve the organophilicity of the filler, keeping in mind their final application as fillers for, usually hydrophobic, polymer matrices. We have used the modified rehydration procedure for preparing organically modified LDH. The stoichiometric quantities of Ca33Al2O6, CaO and benzoic (B) (or undecenoic (U)) acid were mixed with water and some acetone. After long and vigorous shaking, the precipitated fillers were washed, dried and characterized. X-ray diff...
ACS Symposium Series, 2005
Page 1. Chapter 24 Dual Detection High-Performance Size-Exclusion Chromatography System as an Aid... more Page 1. Chapter 24 Dual Detection High-Performance Size-Exclusion Chromatography System as an Aid in Copolymer Characterization Tatjana Tomić1, Marko Rogoić2, Zvonimir Matusinović2, and Nikola egudović1 1Strategic ...
ACS Symposium Series, 2012
Polimeri : časopis za plastiku i gumu, 2012
Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2... more Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) was prepared by a variation of the rehydration method, by adding benzoic acid and CaO into a mixture of water and acetone used to convert tricalcium aluminate (Ca 3 Al 2 O 6) into fi nal layered structure. Intercalation of benzoate anions within LDH layers was confi rmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Intercalated nanocomposites based on an epoxy resin and LDH-B were prepared by in situ polymerisation, with poly(oxypropylene) diamine as a curing agent. Nanocomposites prepared with different contents of LDH-B (5, 10 and 15 phr) were characterised by XRD, FTIR, TGA, differential scanning calorimetry and transmission electron microscopy (TEM). The XRD results indicated formation of intercalated nanocomposites, and TEM analysis confi rmed that LDH-B was dispersed within the matrix forming an intercalated structure, which becomes partially exfoliated in the nanocomposite with 5 phr fi ller. Results of thermal analysis showed detrimental infl uence on initial degradation temperature in comparison to the neat crosslinked epoxy, while residue at 1,000°C increases, especially for the partially exfoliated nanocomposite. The glass transition temperature decreases in comparison with the neat crosslinked epoxy, indicating poorer crosslinking of the epoxy matrix. KEY WORDS: epoxy resin intercalated nanocomposite layered double hydroxide (LDH) morphology thermal properties KLJUČNE RIJEČI: epoksidna smola interkalirani nanokompozit morfologija slojeviti hidroksidi (LDH) toplinska svojstva Toplinska svojstva interkaliranih nanokompozita na osnovi epoksidne smole i slojevitog hidroksida Sažetak Pripravljen je Ca-Al slojeviti hidroksid (LDH) modifi ciran benzoatnim anionima (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) modifi ciranom metodom rehidratacije, tj. dodavanjem benzojeve kiseline i CaO u smjesu vode i acetona, kojom se trikalcijev aluminat (Ca 3 Al 2 O 6) pretvara u konačni slojeviti hidroksid. Interkalacija benzoatnih aniona unutar LDH slojeva potvrđena je rendgenskom difrakcijom (XRD), spektroskopijom u infracrvenom području (FTIR) i termogravimetrijskom analizom (TGA). Interkalirani nanokompoziti na osnovi epoksidne smole i LDH-B pripravljeni su in situ polimerizacijom, uz polioksipropilen diamin kao umreživalo. Uzorci s različitim udjelom LDH-B (5, 10 i 15 phr) ispitivani su XRD-om, FTIR-om, TGA-om, razlikovnom pretražnom kalorimetrijom i transmisijskom elektronskom mikroskopijom (TEM). Rendgenska difrakcija pokazala je nastajanje interkaliranih nanokompozita, a TEM analiza potvrdila raspršenje LDH-B unutar matrice i nastajanje interkalirane strukture, uz djelomično raslojavanje u nanokompozitu s 5 phr punila. Toplinska analiza pokazala je smanjenje početne temperature degradacije u usporedbi s nemodifi ciranim epoksidnim polimerom, dok se ostatak pri 1000 °C povećao, posebice kod djelomično raslojenog nanokompozita. Staklište se snizuje u usporedbi s nemodificiranim epoksidnim polimerom, što upućuje na slabije umreživanje epoksidne matrice.
2022 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
VI. susret mladih kemijskih inženjera, 2006
Exfoliated polystyrene nanocomposites have been synthesized by in situ bulk multistep polymerizat... more Exfoliated polystyrene nanocomposites have been synthesized by in situ bulk multistep polymerization of polystyrene (PS) in the presence of the filler. The filler was layered double hydroxide (LDH) – tetracalcium aluminate hydrate, modified by the intercalation of benzoate anions (Ca4Al2(OH)12(C6H5COO)2• xH2O). Benzoate anions were found to increase the interlayer distance of the original filler. At the same time, the organophilicity of the filler was increased. The LDH was prepared using a variant of the rehydration method. The PS/LDH composites were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM) methods. XRD and TGA results pointed to the successful incorporation of the filler within the polymer matrix. However, XRD results indicated that a characteristic layered structure of the filler had disappeared, i.e. the delamination had occurred. The ...
Anorganska se punila ugrađuju u polimernu matricu radi poboljsanja svojstava matrice. Svojstva na... more Anorganska se punila ugrađuju u polimernu matricu radi poboljsanja svojstava matrice. Svojstva nastaloga kompozitnog materijala u velikoj mjeri ovise ne samo o svojstvima punila i polimera, nego i o kvaliteti dodira i svojstvima granice faza polimer/punilo. Posebice velika dodirna povrsina ostvaruje se uporabom punila manje velicine cestica. Granicni su primjer tzv. nanokompozitni materijali, punjeni cesticama nanometarske velicine. Prakticnu poteskocu predstavlja kvalitetno umjesavanje, dispergiranje, nanocestica u plastomernu matricu zbog kohezije nanoprasaka i nekompatibilnosti organske i anorganske faze. Stoga je u ovom radu primijenjena metoda in situ polimerizacije, pri kojoj se punilo mijesa s monomerom, a polimerizacija se inicira nakon umjesavanja. Kao potencijalno nanopunilo za polistiren, poli(metil-metakrilat) i njihove kopolimere pripravljen je Ca4Al2(OH)12(C6H5COO)2´H2O (tetrakalcijaluminat hidrat modificiran benzoatnim anionima, CABZ) iz razreda anorganskih faza sloje...
Sigurnost, 2019
Ovim radom opisuju se vrste potencijalnih opasnosti od požara i/ili eksplozije te načini raščlanj... more Ovim radom opisuju se vrste potencijalnih opasnosti od požara i/ili eksplozije te načini raščlanjivanja i prosuđivanja mogućih ugroženosti ili razine rizika od tih opasnosti pri obavljanju fizioterapeutske djelatnosti. Posebna pozornost posvećena je predočavanju znakovitih uzroka požara i eksplozija, te svih praktičnih izvora energije paljenja. U radu je prikazan pregled vrsta i obilježja zapaljivosti požarno i eksplozijski potencijalno opasnih tvoriva i tvari, držanih ili rabljenih u sklopu svih prostora ustanova u kojima se provodi fizioterapeutska djelatnost. Radom su prikazani neki lako mogući uzroci nastanka požara i/ili eksplozije u sklopu takvih prostora zbog nepoštovanja tehničkih smjernica, preporuka i zakonskih propisa s ciljem da se iskoriste spoznaje o uočenim rizicima kako bi se oni smanjili na najmanju moguću mjeru.
Polimeri Casopis Za Plastiku I Gumu, Feb 27, 2013
Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2... more Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) was prepared by a variation of the rehydration method, by adding benzoic acid and CaO into a mixture of water and acetone used to convert tricalcium aluminate (Ca 3 Al 2 O 6) into fi nal layered structure. Intercalation of benzoate anions within LDH layers was confi rmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Intercalated nanocomposites based on an epoxy resin and LDH-B were prepared by in situ polymerisation, with poly(oxypropylene) diamine as a curing agent. Nanocomposites prepared with different contents of LDH-B (5, 10 and 15 phr) were characterised by XRD, FTIR, TGA, differential scanning calorimetry and transmission electron microscopy (TEM). The XRD results indicated formation of intercalated nanocomposites, and TEM analysis confi rmed that LDH-B was dispersed within the matrix forming an intercalated structure, which becomes partially exfoliated in the nanocomposite with 5 phr fi ller. Results of thermal analysis showed detrimental infl uence on initial degradation temperature in comparison to the neat crosslinked epoxy, while residue at 1,000°C increases, especially for the partially exfoliated nanocomposite. The glass transition temperature decreases in comparison with the neat crosslinked epoxy, indicating poorer crosslinking of the epoxy matrix. KEY WORDS: epoxy resin intercalated nanocomposite layered double hydroxide (LDH) morphology thermal properties KLJUČNE RIJEČI: epoksidna smola interkalirani nanokompozit morfologija slojeviti hidroksidi (LDH) toplinska svojstva Toplinska svojstva interkaliranih nanokompozita na osnovi epoksidne smole i slojevitog hidroksida Sažetak Pripravljen je Ca-Al slojeviti hidroksid (LDH) modifi ciran benzoatnim anionima (Ca 4 Al 2 (OH) 12 (C 6 H 5 COO) 2 • x H 2 O, LDH-B) modifi ciranom metodom rehidratacije, tj. dodavanjem benzojeve kiseline i CaO u smjesu vode i acetona, kojom se trikalcijev aluminat (Ca 3 Al 2 O 6) pretvara u konačni slojeviti hidroksid. Interkalacija benzoatnih aniona unutar LDH slojeva potvrđena je rendgenskom difrakcijom (XRD), spektroskopijom u infracrvenom području (FTIR) i termogravimetrijskom analizom (TGA). Interkalirani nanokompoziti na osnovi epoksidne smole i LDH-B pripravljeni su in situ polimerizacijom, uz polioksipropilen diamin kao umreživalo. Uzorci s različitim udjelom LDH-B (5, 10 i 15 phr) ispitivani su XRD-om, FTIR-om, TGA-om, razlikovnom pretražnom kalorimetrijom i transmisijskom elektronskom mikroskopijom (TEM). Rendgenska difrakcija pokazala je nastajanje interkaliranih nanokompozita, a TEM analiza potvrdila raspršenje LDH-B unutar matrice i nastajanje interkalirane strukture, uz djelomično raslojavanje u nanokompozitu s 5 phr punila. Toplinska analiza pokazala je smanjenje početne temperature degradacije u usporedbi s nemodifi ciranim epoksidnim polimerom, dok se ostatak pri 1000 °C povećao, posebice kod djelomično raslojenog nanokompozita. Staklište se snizuje u usporedbi s nemodificiranim epoksidnim polimerom, što upućuje na slabije umreživanje epoksidne matrice.
Polimeri Casopis Za Plastiku I Gumu, Nov 18, 2008
U posljednjih desetak godina osobitu pozornost privla~e slojeviti hidroksidi (e. layered double h... more U posljednjih desetak godina osobitu pozornost privla~e slojeviti hidroksidi (e. layered double hydroxides, LDH) kao potencijalna nanopunila za polimere. Osnovni anorganski slojevi LDH pozitivno su nabijeni te predstavljaju komplement negativno nabijenim slojevitim silikatima i omogu}uju uvo|enje razli~itih aniona kao modifikatora u strukturu punila. Ve}ina istra`enih slojevitih hidroksida sintetskog je podrijetla i stoga visoke ~isto}e, {to im je prednost u usporedbi s prirodnim punilima. Svojstva slojevitih hidroksida mogu se mijenjati u {irokom rasponu, prikladnim izborom metalnih kationa i protuaniona. Ovaj rad daje pregled novijih istra`ivanja slojevitih hidroksida-nanopunila za polimere, uklju~uju}i postupke priprave i karakterizacije te na~ine ugradnje u polimerne matrice.
U posljednjih desetak godina osobitu pozornost privlače slojeviti hidroksidi (e. layered double h... more U posljednjih desetak godina osobitu pozornost privlače slojeviti hidroksidi (e. layered double hydroxides, LDH) kao potencijalna nanopunila za polimere. Osnovni anorganski slojevi LDH pozitivno su nabijeni te predstavljaju komplement negativno nabijenim slojevitim silikatima i omogućuju uvođenje različitih aniona kao modifikatora u strukturu punila. Ve}ina istraženih slojevitih hidroksida sintetskog je podrijetla i stoga visoke čistoće, što im je prednost u usporedbi s prirodnim punilima. Svojstva slojevitih hidroksida mogu se mijenjati u širokom rasponu, prikladnim izborom metalnih kationa i protuaniona. Ovaj rad daje pregled novijih istraživanja slojevitih hidroksida – nanopunila za polimere, uključujući postupke priprave i karakterizacije te načine ugradnje u polimerne matrice. / Over the past decade, special attention has been paid to layered double hydroxides (LDH) as potential nanofillers for polymers. Basic inorganic layers of LDHs are positively charged; thus they complemen...
Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - ... more Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - usually inorganic - filler. The types of nanofillers are indicated in Fig. 1. Beside wellknown layered silicate fillers, recent attention is attracted to layered double hydroxide fillers (LDH), mainly of synthetic origin. The structure of LDH is based on brucite, or magnesium hydroxide, Mg(OH)2 and is illustrated in Fig. 2. The modification of LDHs is commonly done by organic anions, to increase the original interlayer distance and to improve the organophilicity of the filler, keeping in mind their final application as fillers for, usually hydrophobic, polymer matrices. We have used the modified rehydration procedure for preparing organically modified LDH. The stoichiometric quantities of Ca33Al2O6, CaO and benzoic (B) (or undecenoic (U)) acid were mixed with water and some acetone. After long and vigorous shaking, the precipitated fillers were washed, dried and characterized. X-ray diff...
Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - ... more Polymeric nanocomposites are commonly considered as systems composed of a polymeric matrix and - usually inorganic - filler. The types of nanofillers are indicated in Fig. 1. Beside wellknown layered silicate fillers, recent attention is attracted to layered double hydroxide fillers (LDH), mainly of synthetic origin. The structure of LDH is based on brucite, or magnesium hydroxide, Mg(OH)2 and is illustrated in Fig. 2. The modification of LDHs is commonly done by organic anions, to increase the original interlayer distance and to improve the organophilicity of the filler, keeping in mind their final application as fillers for, usually hydrophobic, polymer matrices. We have used the modified rehydration procedure for preparing organically modified LDH. The stoichiometric quantities of Ca33Al2O6, CaO and benzoic (B) (or undecenoic (U)) acid were mixed with water and some acetone. After long and vigorous shaking, the precipitated fillers were washed, dried and characterized. X-ray diff...
ACS Symposium Series, 2005
Page 1. Chapter 24 Dual Detection High-Performance Size-Exclusion Chromatography System as an Aid... more Page 1. Chapter 24 Dual Detection High-Performance Size-Exclusion Chromatography System as an Aid in Copolymer Characterization Tatjana Tomić1, Marko Rogoić2, Zvonimir Matusinović2, and Nikola egudović1 1Strategic ...
ACS Symposium Series, 2012