| abstract |
PROBLEM TO BE SOLVED: To provide a well-balanced biodegradable composite having excellent heat resistance and mechanical strength and good biodegradability. The present invention comprises (1) (A) polylactic acid unit A composed of 90 to 99 mol% L-lactic acid units and (B) 90 to 99 mol% D-lactic acid units. It consists of polylactic acid unit B, the weight ratio of polylactic acid unit A to polylactic acid unit B is in the range of 90:10 to 10:90, the weight average molecular weight is 100,000 to 500,000, and a differential scanning calorimeter ( DSC) In the measurement, a stereocomplex polylactic acid having a melting peak ratio of 195 ° C. or higher of the melting peak in the temperature rising process is 80% or more, and (2) natural fiber, It is a biodegradable composite in which the weight ratio of stereocomplex polylactic acid and natural fiber is in the range of 98: 2 to 1:99. [Selection figure] None |