PHYSICOMECHANICAL, THERMOCHEMICAL AND DIELECTRIC PROPERTIES OF FILMS BASED ON PLANT ANALOGES PHARMACEUTICAL GELATINE
Natural hydrocolloids are a promising material for the production of biodegradable films. The aim of this study was to conduct a comparative analysis of the physico-mechanical, thermal and dielectric properties of biodegradable films prepared on the basis of natural polysaccharides (corn starch, amylase starch, carrageenan) and gelatin. It has been established that the thickness and strength properties of films based on gelatin higher than that of films based on carrageenan. Marked reduction in the thickness and strength properties of films with increasing content of plasticizer in the composition of glycerin. It was shown that the melting point of the films on the basis of the above carrageenans values ​​for films based on starch and gelatin. According to the results of differential scanning calorimetry revealed that the maximum value of the melting temperature (70,4 °C) characterized by a film based on carrageenan and minimum (66,4 °C) – a film based on maize starch. Gelatin based films have the largest value of glass transition temperature (155,8 °C), a film of carrageenans – lowest (155,8 °C). An analysis of the dielectric properties of the films showed that with increasing frequency there is a decrease of the dielectric constant for all samples analyzed, with the maximum reduction of the magnitude observed in the frequency range from 5 to 1000 Hz.