Method for producing starch copolymers with aliphatic polyesters

Abstract

The subject of the application is a method for obtaining copolymers of starch with aliphatic polyesters, such as polylactide or polycaprolactone, which consists in reacting starch with a monomer, such as lactic acid or ɛ-caprolactone, in an argon atmosphere, in the presence of a catalyst in the form of (Sn(Oct)2), in an aqueous medium or in an anhydrous medium, with stirring, at a temperature of 140°C under a pressure of 93.1 hPa for 5 hours. The obtained raw product is purified by successive dispersion in chloroform, vacuum filtration, dispersion in a mixture of water and ethanol and finally again vacuum filtration, and the purified products are dried at a temperature of 40°C for 24 hours.