Biobased Rubber Modified BioDegradable Polymer Blends

摘要

Compositions of biobased polymer blends of polymers and a polyhydroxyalkanoate copolymer are described. In certain embodiments, the copolymer is a multiphase copolymer blend having one phase a glass transition temperature of about −5° C. to about −50° C. Methods of making the compositions of the invention are also described. Also articles, films and laminates made from the compositions are described.

主权项

1. A branched biodegradable polymer composition comprising a blend of:
a. polylactic acid (PLA); and b. a biodegradable polyhydroxyalkanoate (PHA) polymer having a glass transition temperature (Tg) of between about −5° C. and about −50° C. and a molecular weight of between about 450,000 Daltons and about 1,500,000 Daltons, wherein the PHA polymer is a copolymer of:
i. 3-hydroxybutyrate; andii. One or more monomer selected from 4-hydroxybutyrate, 5-hydroxyvalerate, 3-hydroxyhexanoate and 3-hydroxyoctanoate, wherein the one or more monomers about 25% to about 85% of the weight of the PHA polymer; wherein the PHA polymer is between about 3% and about 40% of the weight of the branched biodegradable polymer composition.