• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Wood flour/polylactide biocomposites toughened with polyhydroxyalkanoates
【24h】

Wood flour/polylactide biocomposites toughened with polyhydroxyalkanoates

机译：木粉/聚乳酸生物复合材料，用聚羟基链烷酸酯增韧

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

Polylactide (PLA)-based wood-plastic composites (WPCs) were successfully manufactured by extrusion blending followed by injection molding. The effects of polyhydroxyanoates (PHAs) on the mechanical and thermal properties and the morphologies of the PLA-based WPCs were investigated with mechanical testing, thermal analysis, and scanning electronic microscopy (SEM). The inclusion of PHAs in the PLA-based WPCs produced an increase in the impact resistance and a decrease in the tensile strength. The brittle-ductile transition of the impact strength for the PLA-based WPCs toughened with PHAs was confirmed when the wood flour content was between 15 and 35 wt %. SEM images showed that the fracture surfaces of the PLA-based WPCs toughened with PHAs were rougher than that of their nontoughened counterparts. The ternary PLA-based WPCs exhibited ductile fracture during mechanical testing. Differential scanning calorimetry (DSC) showed that addition of PHAs into the composites caused deviations of the cold crystallization temperature and melting temperature of PLA. Thermogravimetric analysis indicated that the PHAs reduced the thermal stability of the PLA-based WPCs. PHAs can be a green toughening agent for PLA-based WPCs. The specific properties evidenced by the biocomposites may hint at their potential application, for example, in the automotive industry and civil engineering.
机译：通过挤出共混然后注塑成型成功制造了基于聚丙交酯（PLA）的木塑复合材料（WPC）。通过机械测试，热分析和扫描电子显微镜（SEM）研究了聚羟基酸酯（PHA）对基于PLA的WPC的机械和热性能以及形貌的影响。在基于PLA的WPC中包含PHA会提高抗冲击性并降低拉伸强度。当木粉含量在15重量％至35重量％之间时，证实了用PHA增韧的PLA基WPC的冲击强度的脆性-延性转变。 SEM图像显示，用PHA增韧的PLA基木塑复合材料的断裂表面比未增韧的木塑复合材料的断裂表面更粗糙。基于三元PLA的WPC在机械测试过程中表现出韧性断裂。差示扫描量热法（DSC）表明，向复合物中添加PHA会引起PLA的冷结晶温度和熔融温度的偏差。热重分析表明，PHA降低了基于PLA的WPC的热稳定性。对于基于PLA的WPC，PHA可以是绿色增韧剂。生物复合材料所证明的特定特性可能暗示了它们的潜在应用，例如在汽车工业和土木工程中。

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