Thermal Analysis of the Compounds Obtained by Polymerization Between Inulin Esters And Different Monomers (original) (raw)
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Journal of Polymer Research, 2011
New inulin-based materials were obtained by graft-copolymerization of inulin (poly-β(1→2)-fructoside) with 2-ethyl-hexyl acrylate. Inulin mixed esters were first synthesized by acylation using methacryloyl and palmitoyl chlorides. Further, these esters were copolymerized with 2-ethyl-hexyl acrylate in order to obtain bio-based crosslinked materials that could be used as commodity plastics and that would have biodegradable properties. The obtained products were characterized using FT-IR and 1 H NMR spectroscopies, thermogravimetry; differential scanning calorimetry, and activation energy for the degradation processes (using Kissinger method) was calculated. These biomaterials were also subjected to density measurement, tensile and torsion tests to evaluate their mechanical properties.
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In this preliminary study, inulin, a fructooligosaccharide extracted from chicory roots, was converted into plastic films by acylation in homogeneous media and under conventional heating, using methacryloyl and lauroyl chlorides as acylating reagents and N,N-dimethyl-4-aminopyridine as basic catalyst. Products were analyzed by FT-IR and 1 H NMR spectroscopies to confirm their structures. A preliminary study of their thermal properties was also achieved.
Carbohydrate Polymers, 2010
The  (2 → 1) fructosyl fructose unit containing carbohydrate polymer (inulin) exhibits interesting solution properties. Its physicochemical behaviors in aqueous and aquo-organic (DMSO-water and isopropanol (IP)-water) media as well as in solvent depleted states have been investigated using viscometry, DLS, TEM and AFM methods. The solvent type and composition dependent changes in aggregation of the biopolymer have been examined. The energetics of solubility of inulin in water and IP-water media, and the salt effect on the process have been evaluated. The salting out phenomenon has been examined in terms of Hofmeister or lyotropic series. Its correlation with ionic radius, hydrodynamic radius, and lyotropic number has been tested. The molecular configurations of the polysaccharide in the solvent media have been assessed by the DLS method. In the solvent removed state, globular, rod-like and elongated fiber-like species registering fingerprint patterns of the biopolymer have been witnessed from TEM and AFM measurements. (S.P. Moulik). . But studies on different solution properties of inulin remain to be inadequate. Recently, we have attempted to characterize chicory inulin in both solid and solution states. Its molar mass, sorption of water vapor, thermal solubility, hydration, viscosity behavior in water and in DMSO, molecular association and configuration in these media, etc have been studied . The polymer has evidenced interesting solution behavior which has prompted us to study the polymer further.
Synthesis of fructooligosaccharide-based plastic films starting from inulin
e-Polymers, 2005
In this preliminary study, inulin, a fructooligosaccharide extracted from chicory roots, was converted into plastic films by acylation in homogeneous medium and under conventional heating, using methacryloyl and lauroyl chlorides as acylating reagents and N,N-dimethyl-4-aminopyridine as basic catalyst. Products were analyzed by FT-IR and 1 H NMR spectroscopies to confirm their structures. A preliminary study of their thermal properties was also achieved. Unauthenticated Download Date | 2/15/16 4:33 PM CH 2 O OH HO O HO O OH HO O HO OH
The Main objective of the present study was to develop polysaccharide based biopolymer films with similar properties comparable to synthetic polymer films using waste materials of plant origin ,especially by the utilization of starch and pectin from plant source namely Mangifera indica (Mango kernel starch) and Cyphomandra betacea (Tree tomato pectin) . To overcome the problems due to usage of plastics, to conserve non-renewable resources like petroleum, natural gas and coal, to maintain ecological balance and to reduce pollution it is the need of the hour to develop ecofriendly biodegradable plastics that are made from renewable resources. An effort had been taken to develop a polysaccharide based polymer film and to study the filmogenicity and biodegradability of mango kernel starch-polyvinyl alcohol cross linked film. Mango kernel starch was isolated and evaluated for the physiochemical property and biodegradability of the prepared polysaccharide based film. The isolated starch showed a good physicochemical property and film forming property with polyvinyl alcohol and pectin. The developed polysaccharide based polymer film can be used as a substitute for synthetic polymer in pharmaceutical industry.
Inulin, a flexible oligosaccharide I: Review of its physicochemical characteristics
Carbohydrate polymers, 2015
Inulin, a fructan-type polysaccharide, consists of (2→1) linked β-d-fructosyl residues (n=2-60), usually with an (1↔2) α-d-glucose end group. The applications of inulin and its hydrolyzed form oligofructose (n=2-10) are diverse. It is widely used in food industry to modify texture, replace fat or as low-calorie sweetener. Additionally, it has several applications in other fields like the pharmaceutical arena. Most notably it is used as a diagnostic agent for kidney function and as a protein stabilizer. This work reviews the physicochemical characteristics of inulin that make it such a versatile substance. Topics that are addressed include morphology (crystal morphology, crystal structure, structure in solution); solubility; rheology (viscosity, hydrodynamic shape, gelling); thermal characteristics and physical stability (glass transition temperature, vapor sorption, melting temperature) and chemical stability. When using inulin, the degree of polymerization and processing history sh...
Alteration of the structural properties of inulin gels
Food Hydrocolloids, 2019
In this work, inulin particle gels, prepared with a type of long chain inulin, were examined in terms of their structural properties and mechanical response, depending on the applied shear rates and temperature during gel preparation. The results are interpreted on the basis of a particle gel model, which takes into account the varying gel structure, depending on the sample preparation parameters. X-ray measurements of the inulin powder, used for the experiments, revealed a mostly amorphous powder. The temperature profiles for the sample preparation, chosen from 25 °C to 60 °C with constant stirring at 600 rpm, yielded viscoelastic particle gels with decreasing hardness. By application of high shear rates (7000 rpm) at the same temperature conditions, the gel hardness was increased. Time resolved X-ray scattering experiments during gel formation provided information about the crystallization kinetics and examination of the inulin gels, using static light scattering, confirmed that the final gel particle size depends on the sample preparation temperature. Thus, the results show a high sensitivity of the structural and textural properties of inulin gels to the variation of applied temperature and shearing during sample preparation. Those findings allow the controlled alteration of large scale structures and thus of the textural properties in food systems containing inulin.