A method for preparing thermoplastic starch and a method for preparing master batch of degradable plastics from the thermoplastic starch

摘要

The present invention provides a process for preparing thermoplastic starch by treating starch with a plasticizer, wherein the plasticizer comprises a basic aqueous solution. The present invention also provides a process for producing a chemically modified thermoplastic starch by simultaneously carrying out the plasticization reaction and chemical modification of the starch, which method is to simultaneously treat the starch with a plasticizer and a basic chemical solution containing a basic aqueous solution. It features. The thermoplastic starch thus prepared may be kneaded and extruded with biodegradable / general purpose resins to produce masterbatches for biodegradable plastic products.;The method of the present invention makes it possible to obtain a plastic film with improved mechanical and chemical properties, while simplifying the work process and reducing the manufacturing cost.