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首页> 外文期刊>Polymer Composites >Crystallization, Mechanical Properties, and Enzymatic Degradation of Biodegradable Poly(ε-caprolactone) Composites with Poly(lactic acid) Fibers
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Crystallization, Mechanical Properties, and Enzymatic Degradation of Biodegradable Poly(ε-caprolactone) Composites with Poly(lactic acid) Fibers

机译：聚乳酸纤维可生物降解聚ε-己内酯复合材料的结晶，力学性能和酶促降解

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摘要

Biodegradable polymer composites based on poly(ε-caprolactone) (PCL) and poly(lactic acid) (PLA) fibers were prepared by melt compounding. The effects of PLA fibers on the crystallization, mechanical properties, and enzymatic degradation of PCL composites were investigated. The addition of PLA fibers enhanced the crystallization of PCL due to the heterogeneous nucleation effect of fibers. However, the final crystallin-ity of the PCL in the composites was little changed in the presence of PLA fibers. With the addition of PLA fibers, significant improvement in storage modulus (￡') of PCL in the composites was achieved. A significant increase in E' was 173% for the composites as compared to that of the neat PCL at 20°C. With the increase in PLA fibers content, the PCL composites showed decreased elongation and strength at break; however, the tensile yield strength and modulus were increased significantly, indicating that PCL was obviously reinforced by adding PLA fibers. Although the PLA fibers retarded the enzymatic degradation of PCL, it was possible to be completely degraded without much degradation time for PCL blending with suitable amounts of PLA fibers.
机译：通过熔融共混制备了基于聚ε-己内酯（PCL）和聚乳酸（PLA）纤维的可生物降解的聚合物复合材料。研究了PLA纤维对PCL复合材料的结晶，机械性能和酶促降解的影响。由于纤维的异质成核作用，添加PLA纤维增强了PCL的结晶。但是，在PLA纤维的存在下，复合材料中PCL的最终结晶度几乎没有变化。通过添加PLA纤维，可以显着提高复合材料中PCL的储能模量（￡'）。与20°C时纯PCL相比，复合材料的E'明显增加了173％。随着PLA纤维含量的增加，PCL复合材料的伸长率和断裂强度降低。但是，拉伸屈服强度和模量显着增加，表明添加PLA纤维后PCL明显增强。尽管PLA纤维阻碍了PCL的酶促降解，但可以在没有太多降解时间的情况下将PCL完全降解，将PCL与适量的PLA纤维混合。

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