Toughening of Poly(l-Lactide) with Branched Polycaprolactone: Effect of Chain Length.

ABSTRACT: In this work, a series of branched polycaprolactone (BPCL) samples with different ε-caprolactone (CL) chain lengths were synthesized and used to toughen poly (lactic acid) (PLA). The spherical structure increased the free volume, facilitating the free movement of the PLA chain segment and increasing the ductility. In addition, the hydrogen bonds between the multi-terminal hydroxyl group of BPCL _x and PLA improved the interaction between them. The glass-transition temperatures (T _g) and crystallization temperatures (T _c) of the blends were significantly lower than those of PLA, and these temperatures increased with the chain length of polycaprolactone. BPCL _x increased the crystallization rate of PLA through heterogeneo

SUBMITTER: Yang X 

PROVIDER: S-EPMC7675962 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature