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Synthesis of poly(ε-caprolactone)-poly(L-lactide) block copolymers by melt or solution sequential copolymerization using nontoxic dibutylmagnesium as initiator

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Summary

Poly(ε-caprolactone)-poly(L-lactide) (PCL-PLLA) block copolymers were synthesized via melt or solution sequential copolymerization of ε-caprolactone (ε-CL) and L-lactide (L-LA) using nontoxic dibutylmagnesium as initiator. The formation of block structure was confirmed by 1H-, 13C NMR, GPC, and FT-IR, it can be concluded that the block copolymers PCL-PLLA have been successfully synthesized by both melt and solution sequential copolymerization methods. Two melting endothermic peaks (Tm) during heating and two crystallization exothermal peaks (Tc) during cooling were observed in DSC curves. XRD patterns of the copolymers were approximately the superposition of both the PCL and PLLA homopolymers. The results indicated the coexistence of both PCL and PLLA crystalline microdomains, and the microphase separation took place in the block copolymers.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Dalian Maritime University, 116026, Dalian, P.R. China

    Zhiyong Wei, Lian Liu, Pei Wang & Chao Qu

  2. School of Materials Science and Engineering, Dalian University of Technology, 116024, Dalian, P.R. China

    Zhiyong Wei, Fengyun Yu & Min Qi

  3. School of Automotive Engineering, Dalian University of Technology, 116024, Dalian, P.R. China

    Zhiyong Wei

Authors
  1. Zhiyong Wei
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  2. Lian Liu
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  3. Fengyun Yu
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  4. Pei Wang
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  5. Chao Qu
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  6. Min Qi
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Correspondence to Lian Liu.

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Wei, Z., Liu, L., Yu, F. et al. Synthesis of poly(ε-caprolactone)-poly(L-lactide) block copolymers by melt or solution sequential copolymerization using nontoxic dibutylmagnesium as initiator . Polym. Bull. 61, 407–413 (2008). https://doi.org/10.1007/s00289-008-0964-0

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  • DOI: https://doi.org/10.1007/s00289-008-0964-0

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