Nonisothermal crystallization behaviour of poly(ρ-dioxanone) and poly(L-lactic acid) blends

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• 作者：XIAOJIN ZHANG ; WEI BAI ; DONGLIANG CHEN ; CHENGDONG XIONG…
• 关键词：Poly(L ; lactide) ; poly(ρ ; dioxanone) ; blends ; nonisothermal crystallization
• 刊名：Bulletin of Materials Science
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：38
• 期：2
• 页码：517-523
• 全文大小：752 KB
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• 作者单位：XIAOJIN ZHANG (1) (2)
  WEI BAI (1) (3)
  DONGLIANG CHEN (1) (3)
  CHENGDONG XIONG (1) (3)
  XIUBING PANG (3)
  
  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
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Engineering, general
  
• 出版者：Springer India
• ISSN：0973-7669

文摘

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.