Thermogravimetric and Spectroscopic Analysis of 8-Hydroxyquinoline 5-Sulphonic Acid-melamine-formaldehyde Polymer Resin-IV (original) (raw)
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Thermo kinetic study of 8-hydroxyquinoline 5-sulphonic acid-melamine-Formaldehyde polymer resin-III
derpharmachemica.com
The title terpolymer (8-HQ5-SAMF-III) synthesized by the condensation of 8-hydroxyquinoline 5-sulphonic acid (8-HQ5-SA) and melamine (M) with formaldehyde (F) in the presence of acid catalyst and using varied 3:1:5 molar proportions of the reacting monomers. The synthesized terpolymer characterized by different physico-chemical techniques. The thermogravimetric analysis of terpolymer resin prepared in present study has been carried out by non-isothermal thermogravimetric analysis technique in which sample is subjected to condition of continuous increase in temperature at linear rate. Thermal study of the resin was carried out to determine the mode of decomposition and thermal stability. Thermal decomposition curve was studied carefully with minute details. The Freeman-Carroll and Sharp-Wentworth methods have been used in the present investigation to calculate thermal activation energy and different kinetic parameter of the terpolymer resin. Thermal activation energy (Ea) calculated with above two mentioned methods are in close agreement. The advantage of Freeman-Carroll method is to calculate both the order of reaction (n) and energy of activation in one single stage by keeping heating rate constant. By using data of thermogravimetric analysis, various thermogravimetric parameters like frequency factor (Z), entropy change (∆S), free energy change (∆F) and apparent entropy (S*) have been determined using Freeman-Carroll method.
E-Journal of Chemistry, 2009
The terpolymer resins (8-HQ5-SAOF) have been synthesized by the condensation of 8-hydroxyquinoline 5-sulphonic acid (8-HQ5-SA) and oxamide (O) with formaldehyde (F) in the presence of acid catalyst and using varied molar proportion of the reacting monomers. The synthesized terpolymer resins have been characterized by different physico-chemical techniques. Thermogravimetric analysis of all terpolymer resins in present study have been carried out by non-isothermal thermogravimetric analysis technique in which sample is subjected to condition of continuous increase in temperature at linear rate. Thermal study of the resins was carried out to determine their mode of decomposition and relative thermal stabilities. Thermal decomposition curves were studied carefully with minute details. The Freeman-Carroll and Sharp-Wentworth methods have been used in the present investigation to calculate thermal activation energy and different kinetic parameter of the terpolymer resins. Thermal activati...
Archives of Applied Science Research, 2011
Terpolymer (8-HQ5-SAOF-II) was synthesized by the condensation of 8-hydroxyquinoline 5- sulphonic acid (8-HQ5-SA) and oxamide (O) with formaldehyde (F) in the presence of acid catalyst. The terpolymer resin was synthesized by (2:1:3) molar proportion of the reacting monomers. The terpolymer resin composition has been determined on the basis of elemental analysis. The number average molecular weight of this resin was determined by conductometric titration in non-aqueous medium. Viscometric measurement in dimethylsulphoxide (DMSO) has been carried out with a view to ascertain the characteristic functions and constants. Uv-Visible spectra, FTIR, 1H NMR and 13C NMR spectra were studied to elucidate the structure. The morphology of terpolymer was studied by SEM.
Current Applied Polymer Science
Background: Terpolymer have versatile applications in adhesives, electroluminescent devices, packaging, coating materials, ion exchanger and hardener for epoxy resin. Objective: In the present investigation, our main aim was to synthesize terpolymer using 8- hydroxyquinoline-5-sulphonic acid, anthranilic acid and formaldehyde (8-HQ-5-SAAF) via the polycondensation method and to evaluate thermal properties of terpolymer. Materials and Methods: 8-Hydroxyquinoline-5-sulphonic acid, anthranilic acid and formaldehyde were used for synthesis. Terpolymer was obtained by employing the polycondensation method. Results: TGA analysis shows that the synthesized terpolymer resin was thermally stable. The activation energy calculated by Freeman-Carroll and Sharp-Wentworth methods has been found to be in good agreement with each other. The low value of frequency factor and negative entropy value indicate that the thermal decomposition would be a slow reaction. Conclusion: The thermal energy of act...
2014
The present investigation deals with the synthesis and thermal degradation studies of resin 8-Hydroxyquinoline 5- sulphonic acid -semicarbazide - formaldehyde derived by the condensation of 8-Hydroxyquinoline 5-sulphonic acid and semicarbazide with formaldehyde in the presence of 2M acetic acid as catalyst with varying molar proportions of reactants. Copolymer composition has been determined on the basis of their elemental analysis. The copolymer has been characterized by UV-visible, FTIR and 1H NMR spectra. The morphology of synthesized copolymer was studied by scanning electron microscopy (SEM). The thermal decomposition behavior of some new copolymers were studied using thermogravimetric analysis in air atmosphere at heating rate of 10 oC/min. Detailed thermal degradation studies of the resin has been carried out to ascertain its thermal stability. The Freeman– Carroll and Sharp– Wentworth methods have been used to calculate activation energy and thermal stability. Thermal activa...
2012
Polymer was synthesized from the polymerization of 8-hydroxyquinoline 5-sulphonic acid and catechol with formaldehyde (8-HQ- 5- SACF) by solution condensation in an acid medium. The polymer was characterized by elemental analysis, UV-Visible spectra, FTIR and NMR spectroscopy The thermal stability of the polymer was determined by TGA. In addition, the activation energy for the formation of polymer was calculated using TGA data by Freeman-Carroll method and Sharp-Went-worth method. The surface features of the polymer was analyzed by scanning electron microscopy (SEM). The thermodynamic parameter such as free energy change (ΔF), entropy change (ΔS) , Apparent entropy change( S*) and frequency factor Z are also determined on the basis of TGA curve and by using data of Freeman-Carroll method .
Thermal Degradation Studies of Terpolymer Derived from 4-Aminosalicylic Acid-Oxamide-Formaldehyde
Research & Reviews: Journal of Engineering and Technology, 2013
Terpolymer resin (4-ASAOF-III) has been synthesized by the condensation polymerization of 4-Aminosalicylic acid (4-ASA) and Oxamide (O) with Formaldehyde (F) in the presence of 2M HCl as a catalyst using 3:1:4 molar ratios of reacting monomers. The empirical formula and empirical weight of the resin were determined by elemental analysis. The structure of the resin was characterized by various spectral techniques like infra-red (FTIR) and nuclear magnetic resonance (1H and 13C-NMR) spectroscopy. The morphological feature of the 4-ASAOF-III terpolymer resin was established by Scanning electron microscopy (SEM). Thermal study of the resin was carried out to determine its mode of decomposition and relative thermal stability. The Freeman–Carroll, Sharp Wentworth, Friedman and Change technique have been used in the present investigation to calculate thermal activation energy (Ea), order of reaction (n) and frequency factor (z).
2012
Terpolymer resins (SOMF) were synthesized using salicylaldoxime, and melamine with formaldehyde in presence of hydrochloric acid as catalyst and using different molar proportions of salicylaldoxime, melamine and formaldehyde respectively. Its composition has been determined on the basis of the elemental analysis. The number average molecular weights have been determined by non-aqueous conductometric titration. Themogravimetric data was analysed to determine thermal stability of terpolymer and kinetic parameters were evaluated on the basis of thermogram of terpolymer. Freeman-Carroll and Sharp-Wentworth method have been used to calculate activation energy and thermal stabilities of these polymers. Kinetic parameters have been calculated using data of Freeman- Carroll method. the results obtained have been suitably discussed.
Thermal Degradation Studies of 8-Hydroxyquinoline, Adipamide and Formaldehyde Copolymer Resin
2014
The paper reports the synthesis and kinetics of thermal degradation studies of resin 8hydroxyquinoline (8-HQ) - adipamide(A) - formaldehyde (F) derived by the condensation of 8-hydroxyquinoline and adipamide with formaldehyde in the presence of catalyst hydrochloric acid in 2:1:3 molar proportions of reactants. A detail thermal degradation study of the 8-HQAF resin has been carrietd out to ascertain its thermal stability. Thermal degradation curve has been discussed in order to determine their mode of decomposition, order of reaction (n), apparent activation energy (Ea), frequency factor (z), free energy change (ΔF), entropy change (ΔS), and apparent energy change (S*). Freeman – Carroll and Sharp- Wentworth methods have been applied for the calculation of kinetic parameters while the data from the Freeman – Carroll methods have been used to determine various thermodynamic parameters.
2016
The novel terpolymer (1-N-4-SAHDF-Resin-II) has bee n synthesized by polycondensation of 1-Naphthol-4sulphonic acid and Hexamethylene diamine with Forma ldehyde in an acidic medium with molar proportion o f reactants (2:1:3). To reveal the structure of the r esin, the resin was characterized by elemental anal ysis and a spectral method, i.e. composition of terpolymer has been determined on the basis of its elemental anal ysis. The terpolymer resin has been characterized by FT-IR, N MR (H & C) spectra and by SEM. For thermal decomposition studies, 1-N-4-SAHDF-Resin-II terpol ymer has been studied by Thermo Gravimetric Analysi s (TGA) at heating rate 10°C min-1 under nitrogen atmospher e. Detailed thermal degradation studies of the 1-N4 SAHDFResin-II terpolymer has been carried out to ascerta in its thermal stability. Thermal degradation plot has been discussed in order to determine their mode of decom position, order of reaction(n), thermal activation e ergy(Ea), frequency factor(Z),...