• 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 >Study on flax fiber toughened poly (lactic acid) composites
【24h】

Study on flax fiber toughened poly (lactic acid) composites

机译：亚麻纤维增韧聚乳酸复合材料的研究

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

Poly (lactic acid) (PLA) is a renewable and biodegradable polymer with high modulus, high strength but low toughness. Blending PLA with plant fiber has been believed an available strategy to improve the toughness of PLA. PLA/Flax composites were fabricated by extrusion and injection molding processes. The flax fiber surfaces were modified before blending to improve the compatibility, and the chemical structures of both untreated and treated fiber were characterized by Fourier transform infrared spectroscopy. Results of mechanical test showed that the impact strength and elongation at break of PLA/Flax composites were remarkably higher than PLA. The impact fractures of PLA/Flax composites were also observed by scanning electron microscope. The results showed uniform dispersion of fibers in PLA matrix and good compatibility between treated fibers and PLA matrix. Moreover, it can be observed that crazing propagation was hindered by fibers and transcrystalline developed along fibers by polarized optical microscope. Differential scanning calorimetry analysis was carried out to study the crystallinity of PLA and it was found that incorporation of fiber improved the crystallinity of PLA. The toughening mechanism of PLA/Flax composites was discussed according to the results. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42573.
机译：聚乳酸（PLA）是具有高模量，高强度但低韧性的可再生和可生物降解的聚合物。人们一直认为，将PLA与植物纤维混合可以提高PLA的韧性。 PLA /亚麻复合材料是通过挤出和注塑工艺制造的。在共混之前对亚麻纤维的表面进行改性以改善相容性，并通过傅立叶变换红外光谱对未处理和处理过的纤维的化学结构进行表征。力学测试结果表明，PLA /亚麻复合材料的冲击强度和断裂伸长率明显高于PLA。通过扫描电子显微镜还观察到了PLA /亚麻复合材料的冲击断裂。结果表明纤维在PLA基质中均匀分散，并且处理后的纤维与PLA基质之间具有良好的相容性。此外，通过偏振光学显微镜可以观察到裂纹阻碍了纤维的传播，并且沿着纤维发展了跨晶。进行差示扫描量热分析以研究PLA的结晶度，发现掺入纤维改善了PLA的结晶度。根据结果​​讨论了PLA /亚麻复合材料的增韧机理。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42573。

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