Toughening of Poly(L-lactide)‎ with Blends of Poly(ε-caprolactone-co-L-lactide)‎ in the Presence of Chain Extender

الملخص EN

A poly(ε-caprolactone-co-L-lactide) copolyester was synthesized and employed to toughen poly(L-lactide) (PLLA) by reactive melt blending in the presence of an epoxy-based chain extender.

The effects of chain extension reaction and copolyester content on properties of PLLA-based blends were studied.

The chain extension reaction reduced crystallinity and melt flow index of PLLA/copolyester blends.

Meanwhile the copolyester blending improved the crystallinities of the chain-extended PLLA up to 20 wt% copolyester.

The phase compatibility between PLLA matrix and dispersed copolyester phases was enhanced by the chain extension reaction.

The impact strength of chain-extended PLLA increased with the contents of copolyester and chain extender.