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首页> 外文期刊>Journal of Polymers and the Environment >Effect of Poly(para-dioxanone) on the Hydrolytic Degradation of Poly(L-lactide)
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Effect of Poly(para-dioxanone) on the Hydrolytic Degradation of Poly(L-lactide)

机译：聚（对二恶烷酮）对聚（L-丙交酯）水解降解的影响

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摘要

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 degrees 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.
机译：通过溶液共沉淀将聚（L-丙交酯）（PLLA）与各种含量的聚（对二恶烷酮）（PPDO; 5、10、15和20 wt％）混合，以改变PLLA的降解特性。由于PPDO迅速降解，因此可以与PLLA混合使用。通过重量损失（WL）分析，吸水率（WA），磷酸盐缓冲液（pH 7.44）中样品的热性能，表面形态和机械性能研究了PLLA / PPDO共混物的体外水解降解。在37摄氏度下持续8周。在降解过程中，所有共混物的WL和WA均显着增加，随着降解的进行，共混条表面形成了具有缺陷的Fenestral结构。同时，共混物的玻璃化转变温度（T-g），熔融温度（T-m），拉伸强度和断裂伸长率随时间降低，而共混物的水解速率随共混物组成而变化。与PLLA相比，PLLA / PPDO共混物表现出更高的水解速率。

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  • 来源
    《Journal of Polymers and the Environment》 |2015年第2期|156-164|共9页
  • 作者

    Xie Xulong; Bai Wei; Chen Dongliang; Xiong Chengdong; Pang Xiubing;

  • 作者单位

    Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China|Univ Chinese Acad Sci, Beijing 100039, Peoples R China;

    Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China|Zhejiang Engn Res Ctr Biodegradable Med Mat, Dongyang 322100, Peoples R China;

    Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China|Zhejiang Engn Res Ctr Biodegradable Med Mat, Dongyang 322100, Peoples R China;

    Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China|Zhejiang Engn Res Ctr Biodegradable Med Mat, Dongyang 322100, Peoples R China;

    Zhejiang Engn Res Ctr Biodegradable Med Mat, Dongyang 322100, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Poly(L-lactide); Poly(para-dioxanone); Blends; Hydrolytic degradation;

    机译：聚（L-丙交酯）;聚（对二恶烷酮）;共混物;水解降解;

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