Biopolymer Foil Materials Examination with DSC and TSD methods

Abstract Thermally Simulated Depolarization Current measurement is an excellent but not widely used method for identifying relaxation processes in polymers. The TSDC method is used here to analyze the molecular movements in biopolymers. Differential Scanning Calorimetry is a technique used to measure thermal properties of polymers based on the rate at which they absorb heat energy compared to a reference material. The two techniques take advantage of the energy changes involved in the various phase transitions of certain polymer molecules. This allows for several properties of the material to be ascertained; melting points, enthalpies of melting, crystallization temperatures, glass transition temperatures and degradation temperatures. The examined biopolymer films are made from biological materials such as proteins and polysaccharides. These materials have gained wide usage in pharmaceutical, medical and food areas. The uses of biopolymer films depend on their structure and mechanical properties. This work is based on three types of alginate, and gelatin films. The films were prepared by casting. The casting technique used aqueous solutions in each case of sample preparation. The manufacturing process of the sodium alginate and gelatin films was a single stage solving process, and for the calcium alginate and alginic acid have a chemical reaction process.

Keywords alginate, alginic acid, gelatin, DSC, TSD.

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Biopolymer Foil Materials Examination with DSC and TSD methods

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