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    • Keywords

       

      Poly(L-lactide); poly(ρ-dioxanone); blends; nonisothermal crystallization.

    • Abstract

       

      Blends of poly(ρ-dioxanone) (PPDO) and poly(L-lactic acid) (PLLA) in different proportions were prepared by solution co-precipitation. The nonisothermal crystallization behaviour of pure PPDO and PPDO/PLLA blends was investigated by differential scanning calorimetry. The Avrami, Ozawa and Mo models were used to analyse the nonisothermal kinetics. The addition of PLLA significantly increases the crystallization peak temperature and crystallinity of PPDO, but has little effect on crystallization half-time. The activation energies of crystallization were calculated using the Kissinger equation. The results suggest that PLLA plays two roles in the nonisothermal crystallization of PPDO; PLLA both promotes the crystallization of PPDO as a nucleating agent and meanwhile restricts the motion of PPDO chains.

    • Author Affiliations

       

      Xiaojin Zhang1 2 Wei Bai1 3 Dongliang Chen1 3 Chengdong Xiong1 3 Xiubing Pang3

      1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China
      2. University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China
      3. Zhejiang Engineering Research Center in Biodegradable Medical Materials, Dongyang 322100, People's Republic of China
    • Dates

       
  • Bulletin of Materials Science | News

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