• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Effect of Accelerated Weathering on Physico-Mechanical Properties of Polylactide Bio-Composites
【24h】

Effect of Accelerated Weathering on Physico-Mechanical Properties of Polylactide Bio-Composites

机译：加速风化对聚乳酸生物复合材料物理力学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, injection moulded hemp fibre reinforced polylactide bio-composites of different fibre contents (0, 10, 20 and 30wt%) were subjected to accelerated weathering of 12h cyclic exposures of UV-light at 60 degrees C, water spray and condensation at 50 degrees C for 8, 16, 32, 48 and 64 cycles to study the changes in properties such as crystallinity, tensile, flexural, plane-strain fracture toughness (KIc) and strain energy release rate (GIc). The crystallinity of neat polylactide (PLA) was found to increase up to 50.6% after 64 cycles, whereas the crystallinity of composites of different fibre contents was found to increase in the range of 30.6 to 34.5% for 8 to 64 cycles. The overall mechanical properties (tensile, flexural, KIc and GIc) of the composites decreased as the number of cycles increased from 8 to 64. The crystallinity and the residual tensile strength, tensile modulus, tensile strain, KIc and GIc of the composites of 20wt% fibres were found to be the highest after 64 cycles. In contrast, the residual flexural strength and flexural modulus of the composites of 30wt% fibres were found to be the maximum after 64 cycles. Absorption of water, destruction of fibre integrity, degradation of PLA matrix, formation of cracks and pores were found to be the main causes of reduction in the mechanical properties of PLA bio-composites.
机译：在这项工作中，对不同纤维含量（0、10、20和30wt％）的注射成型大麻纤维增强聚丙交酯生物复合材料在60摄氏度的紫外线下进行12h循环暴露的加速风化，喷水并在30℃下凝结。在50摄氏度下进行8、16、32、48和64个循环，以研究诸如结晶度，拉伸，挠曲，平面应变断裂韧性（KIc）和应变能释放速率（GIc）等特性的变化。发现纯聚丙交酯（PLA）的结晶度在64个循环后增加至50.6％，而在8至64个循环中发现不同纤维含量的复合材料的结晶度在30.6至34.5％的范围内增加。随着循环次数从8增加到64，复合材料的整体机械性能（拉伸，挠曲，KIc和GIc）降低。复合材料的结晶度和残余拉伸强度，拉伸模量，拉伸应变，KIc和GIc为20wt发现64次循环后纤维％最高。相反，发现30wt％纤维的复合材料的残余挠曲强度和挠曲模量在64次循环后最大。吸水，破坏纤维完整性，降解PLA基质，形成裂纹和孔是造成PLA生物复合材料力学性能降低的主要原因。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号