• 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 >Effect of processing conditions on crystallization behavior and mechanical properties of poly(lactic acid) staple fibers
【24h】

Effect of processing conditions on crystallization behavior and mechanical properties of poly(lactic acid) staple fibers

机译：加工条件对聚乳酸短纤维结晶行为和力学性能的影响

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

Within this study, the applicability of Raman spectroscopy to characterize the crystallinity of PLA staple fibers was evaluated. The influence of the fiber alignment on the possibility to detect crystallinity by using Raman spectroscopy was studied. PLA staple fibers were produced by melt spinning by varying both draw temperature and draw ratio. Systematic interrelationships between the processing parameters of PLA staple fibers and the degrees of crystallinity and the cold crystallization enthalpies were established. Raman spectroscopy showed that the carbonyl stretching band of Raman spectra measured in fiber axis and parallelly polarized was not sensitive to detect crystallinity. However, for perpendicularly polarized measurements, a higher sensitivity was observed. With increasing degree of crystallinity, a reduction of the band width of the normalized carbonyl stretching band was found. The morphology affected the mechanical properties significantly. Increased draw ratio resulted in increased tensile strength and decreased elongation at break. (C) 2015 Wiley Periodicals, Inc.
机译：在这项研究中，评估了拉曼光谱表征PLA短纤维结晶度的适用性。研究了纤维取向对拉曼光谱检测结晶度的影响。通过改变拉伸温度和拉伸比，通过熔融纺丝生产PLA短纤维。建立了PLA短纤维的加工参数与结晶度和冷结晶焓之间的系统相互关系。拉曼光谱表明，沿纤维轴测量并平行极化的拉曼光谱的羰基拉伸带对检测结晶度不敏感。但是，对于垂直极化测量，观察到更高的灵敏度。随着结晶度的增加，发现归一化羰基拉伸带的带宽减小。形态显着影响机械性能。增加的拉伸比导致增加的拉伸强度和降低的断裂伸长率。 （C）2015年Wiley Periodicals，Inc.

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