• 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 >The effect of solvent mixture on the properties of solvent cast polylactic acid (PLA) film
【24h】

The effect of solvent mixture on the properties of solvent cast polylactic acid (PLA) film

机译：溶剂混合物对溶剂流延聚乳酸（PLA）薄膜性能的影响

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

The objective of this study was to investigate the effects of various solvents on the crystallinity and thermal expansion stability of PLA film. Three different PLA films were produced by the solvent casting technique; PLA in chloroform (PLA-C), PLA in methylene chloride (PLA-M), and PLA in methylene chloride: acetonitrile = 50: 50 (PLA-MA). The PLA-MA had higher % crystallinity, 46.15, than the PLA-C, 24.03, and the PLA-M, 14.25. With this increase in crystallinity, the PLA-MA had improved thermal expansion stability as shown by very low accumulated dimensional changes at 20 to 100°C. Wide-angle X-ray diffraction identified multiple crystalline structures for the PLA-MA. Film barrier properties were also measured. PLA-MA had the lowest oxygen permeability. However, there was no significant difference in water vapor permeability among the three PLA films. The mechanical property tests revealed that the PLA-C and PLA-M were ductile while the PLA-MA was brittle in behavior. The PLA-MA was very hazy as compared with the PLA-C and PLA-M. This work has shown that the PLA-MA had increased % crystallinity and, more importantly, it had improved thermal expansion stability which can be very beneficial for the flexible packaging industry.
机译：这项研究的目的是研究各种溶剂对PLA膜的结晶度和热膨胀稳定性的影响。通过溶剂流延技术生产了三种不同的PLA薄膜;氯仿中的PLA（PLA-C），二氯甲烷中的PLA（PLA-M）和二氯甲烷：乙腈= 50：50（PLA-MA）中的PLA。 PLA-MA的％结晶度为46.15，高于PLA-C的24.03和PLA-M的14.25。随着结晶度的增加，PLA-MA具有改善的热膨胀稳定性，如在20至100°C时非常小的累积尺寸变化所示。广角X射线衍射确定了PLA-MA的多个晶体结构。还测量了膜阻隔性能。 PLA-MA具有最低的透氧性。但是，这三种PLA膜之间的水蒸气渗透率没有显着差异。力学性能测试表明，PLA-C和PLA-M具有延性，而PLA-MA则具有脆性。与PLA-C和PLA-M相比，PLA-MA非常模糊。这项工作表明，PLA-MA具有更高的结晶度％，更重要的是，它具有改善的热膨胀稳定性，这对软包装行业非常有利。

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