THE NOVEL BIODEGRADABLE POLYMER PROCESS

摘要

The present invention relates to an advantageous method for making a biodegradable polymer that can be used for production of packaging materials and biomedical products whereas the method comprises the step of fermentation of starch, saccharose and/or similar carbohydrate feedstock for preparing ammonium lactate; thereafter synthesis of lactate ester from calcium lactate derived from culture medium containing ammonium lactate; followed by catalytic polycondensation of lactate ester to form oligomer; and thereafter depolymerisation of oligomer for preparing lactide and catalytic polymerisation of lactide for preparing polylactic acid.