Stereocomplex formation in AB DI-block copolymers of poly(ϵ-caprolactone) (a) and poly(lactide)(B) |
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Authors: | Willem M. Stevels,Marc J. K. Ankoné ,Pieter J. Dijkstra,Jan Feijen |
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Abstract: | The thermal properties of two series of AB di-block copolymers of poly(ϵ-caprolactone) (A) and poly(lactide) (B) and their blends were studied. Each series contained poly(lactide) blocks of opposite chirality. The length of the poly(ϵ-caprolactone) blocks was not varied (DP = 70), whereas the poly(lactide) blocks were of varying length (DP = 5 − 80). Blends of polymers containing blocks of opposite chirality were prepared by mixing in solution. The melting temperature of the PLA phase was raised by approximately 55 °C in the blends due to stereocomplex formation. The melting temperatures of the crystalline PCL and PLA phases strongly depended on the composition of the block copolymers. |
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