D-POLYLACTIC ACID BLOCK COPOLYMER FUNCTIONING AS L-POLYLACTIC ACID, COMPATIBILIZER, AND CRYSTAL NUCLEATION AGENT, A POLYLACTIC RESIN INCLUDING THE D-POLYLACTIC ACID BLOCK COPOLYMER AND A METHOD FOR PREPARING THE D-POLYLACTIC ACID BLOCK COPOLYMER

摘要

PURPOSE: A D-polylactic acid block copolymer is provided to improve compatibility and heat resistance of L-polylactic acids and a resin molten mixture while enhancing physical and mechanical properties. ;CONSTITUTION: A D-polylactic acid block copolymer comprises a D-polylactic acid segment and a thermoplastic resin segment. The number average molecular weight of the D-polylactic acid segment is 5,000~100,000 g/mol and the number average molecular weight of the D-polylactic acid block copolymer is 10,000~200,000 g/mol. A polylactic acid stereo complex includes (A) the D-polylactic acid block copolymer including the D-polylactic acid segment and the thermoplastic resin segment and (B) a L- polylactic acid.;COPYRIGHT KIPO 2011