BIOBASED POLYESTER BLENDS WITH ENHANCED PERFORMANCE PROPERTIES

摘要

The invention relates to a biodegradable and compostable blend of polylactic acid, a compostable polyester with or without carbon based biocontent, polyethylene glycol, and optionally an inorganic talc filler that have greatly increased elongation, flexibility, and tensile toughness as measured by tensile test ASTM D638-10. These blends of PLA with 5-30% of said polyester, about 10% PEG, and about 5% of an inorganic talc filler unexpectedly increased the elongation to 750+% for molded test bars. Additionally, 4 mil films showed a max tear strength of about 1200 gms (in MD) and 900 gms (in TD) measured by ASTM D1922-09 while maintaining other preferable properties.