Accelerated hydrolytic degradation of poly(lactic acid) achieved by adding poly(butylene succinate)

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• 作者：Yang-peng Wang ; Yan-jun Xiao ; Jin Duan ; Jing-hui Yang ; Yong Wang…
• 关键词：Poly(l ; lactide)/poly(butylene succinate) ; Morphology ; Hydrolytic degradation
• 刊名：Polymer Bulletin
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：73
• 期：4
• 页码：1067-1083
• 全文大小：1,600 KB
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• 作者单位：Yang-peng Wang (1)
  Yan-jun Xiao (1)
  Jin Duan (1)
  Jing-hui Yang (1)
  Yong Wang (1)
  Chao-liang Zhang (2)
  
  1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
  2. State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Characterization and Evaluation Materials
  Soft Matter and Complex Fluids
  Physical Chemistry
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1436-2449

文摘

In this work, different contents (10–40 wt%) of poly(butylene succinate) (PBS) were introduced into poly(lactic acid) (PLA) through the common melt compounding processing. The microstructure and morphologies of the blends were investigated through differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and scanning electron microscope (SEM). The results showed that the presence of PBS neither induces the crystallization nor enhances the crystallinity of PLA matrix, and completely amorphous PLA was obtained in all samples. PBS exhibited dispersed particles in the PLA matrix and there were clear gaps between components. The hydrophilicity of samples was evaluated by measuring contact angles. The results demonstrated that adding PBS improved the hydrophilicity of samples. The hydrolytic degradation measurements were carried out at 37 °C in alkaline solution. The results showed that the presence of PBS accelerated the hydrolytic degradation of PLA matrix. Specifically, the higher the content of PBS was, the bigger the weight loss per unit area of sample was. The hydrolytic degradation mechanism was then analyzed.