Effect of Poly(para-dioxanone) on the Hydrolytic Degradation of Poly(l-lactide)

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• 作者：Xulong Xie ; Wei Bai ; Dongliang Chen…
• 关键词：Poly(l ; lactide) ; Poly(para ; dioxanone) ; Blends ; Hydrolytic degradation
• 刊名：Journal of Polymers and the Environment
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：23
• 期：2
• 页码：156-164
• 全文大小：1,688 KB
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• 作者单位：Xulong Xie (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
  Polymer Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-8900

文摘

Poly(l-lactide) (PLLA) was blended with various contents of poly(para-dioxanone) (PPDO; 5, 10, 15 and 20?wt%) by solution co-precipitation to modify the degradation characteristics of PLLA. As PPDO degrades rapidly, it can be advantageously used in blends with PLLA. The in vitro hydrolytic degradation of the PLLA/PPDO blends was studied by weight loss (WL) analysis, water absorption (WA), the thermal properties, the surface morphology and the mechanical properties of the samples in phosphate-buffered saline (pH 7.44) at 37?°C over 8?weeks. During the degradation process, the WL and WA increased significantly for all blends and a fenestral structure with defects was formed on the surface of blend bars as degradation progressed. Meanwhile, the glass transition temperature (T _g), melting temperature (T _m), tensile strength and breaking elongation of the blends decreased with time, whereas the hydrolysis rate of the blends varied with the blend composition. Compared with PLLA, PLLA/PPDO blends exhibited a higher hydrolysis rate.