Polymer gelatin

Colloidal isotonic solutions of macromolecules include dextrans (glucose polymer), gelatin (hydrolysed collagen) and hydroxyethyl starch. 

By a gelling polymer. Gelatin makes a viscous liquid at temperatures above 30°C, and the liquid can then be beaten to form bubbles, which cream very sluggishly. Cooling the system to below 20°C then causes gelling, and the foam is mechanically stabilized. 

Elastic, plastic, and hydrogel-forming protein-based polymers Gelatin... 

Up to SOOoC processes of structurization of materials proceed. There is an allocation flying vapor waters, low-moleeular flying substances due to formation of amide. This proeess is displayed in the form of peaks on curves DTA for bioinorganic polymers. Gelatin is exposed significant destruction with allocation of fl5dng substances that is displayed in the form of peak on curve DTA (Fig. 2). 

It is well-known that many polymers, synthetic and natural, form physical, thermoreversible aggregates in dilute solutions, whereas in moderately concentrated solutions gels can be formed. Examples are poly(vinyl chloride), polyacrylonitrile, poly(vinyl alcohol), atactic polystyrene, mixtures of syndiotactic and isotactic poly(methyl methacrylates), liquid crystalline polymers, gelatin, agarose, carrageenans etc. 

Suitable polymers - gelatin, PANI, PMHS, PVDF-HFP ... 

Polymeric binders used in multi-layered coatings include various emulsion polymers, gelatin, polyacrylamide, polysaccharides, e.g., agarose, water soluble polymers, e.g., polyvinyl pyrrolidone, polyvinyl alcohol, co—polymers of vinyl pyrrolidone and acrylamide, and hydrophilic cellulose derivatives, e.g., hydroxyethyl cellulose and methyl cellulose. 

The features of the traditional reaction have been studied in detail. An important feature of synthesis of the polymer is that the polymer gelatinizes and polycondensation is strongly slowed in formation of Pl A with a logarithmic viscosity of 2.2 dl/g. The reaction can be accelerated by mechanical destruction of the gel, and the molecular weight of the PPTA increases as a result. It has been shown that old or fresh gels made turbid as a result of crystallization of the polymer are not reactive. The M of the polymer can be sharply increased on addition of tertiary amines to the organic solvent (iVA -dimethylacetamide with lithium chloride), which is due to the acceptor-catalytic effect of these products [2. 3]. 

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