NOVEL ALIPHATIC POLYESTER IONOMER RESIN CONTAINING IONIC GROUPS WITH EXCELLENT BIODEGRADABILITY AND PREPARATION METHOD THEREOF

摘要

PURPOSE: A novel aliphatic polyester ionomer resin is provided to improve the biodegradability compared to the conventional aliphatic polyester resin by introducing ionic groups that improve hydrophilicity. The aliphatic polyester ionomer resin can suitably substitute the conventional non-biodegradable plastics to reduce the environmental pollution. CONSTITUTION: The aliphatic polyester ionomer resin with excellent biodegradability comprises 41-54wt% of a polyhydric aliphatic or alicyclic glycol, 36-52wt% of an aliphatic polycarboxylic acid or its anhydride and 1-23wt% of alkali metal salts of an aliphatic or aromatic sulfone acid, wherein resin molecules form chemical bonds with alkali metal salts of sulfonic acid. The aliphatic polyester ionomer resin is prepared by: adding polyhydric aliphatic or alicyclic glycol, an aliphatic polycarboxylic acid or its anhydride and alkali metal salts of an aliphatic or aromatic sulfonic acid; carrying out esterification of the resulted mixture; and carrying out polycondensation of the mixture by adding a catalyst for polycondensation at 220-260deg.C.