• 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 >A Morphological Study of Melt-Spun Polypropylene Filaments by Atomic Force Microscopy
【24h】

A Morphological Study of Melt-Spun Polypropylene Filaments by Atomic Force Microscopy

机译：熔融纺制聚丙烯长丝的原子力显微镜形态学研究

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

Surface morphology of melt-spun polypropylene (PP) filaments, supn from an additive-free PP powder and from a commercial-grade PP with different draw ratios were examined with atomic force microscopy (AMM). The surface morphology of as-spun filaments was spherulitic. The gradual transformations of the surface structure from a spherulitic morphology to a fibrillar morphology during stretching was studied. In the filaments spun from the commercial-grade PP, the transformation was initiated by deformation of spherulites with a draw ratio of 1.2 and continued wiht association of lamellar stacks into fibrillar chaisn with a draw ratio between 1.2 and 2.0. A hierarchial morpholigical microstructure of fibrils, microfibrils, and nanofibrils was developed with a draw ratio of 4.0. In the filaments spun from the additive-free PP, the association of lamellar stacks into fibrillar morphology occurred considerably later, between draw ratios of 2.0 and 4.0. An oriented lamellar structure was found in these filaments, still with a draw ratio of 4.0.
机译：用原子力显微镜（AMM）检查了由无添加剂的PP粉和具有不同拉伸比的商业级PP制成的熔纺聚丙烯（PP）长丝的表面形态。初纺长丝的表面形态是球形的。研究了拉伸过程中表面结构从球状形态到纤维状形态的逐渐转变。在从工业级PP纺制的长丝中，转变是通过拉伸比为1.2的球晶变形开始的，并继续将层状叠层结合为拉伸比在1.2和2.0之间的原纤维状链簇。拉伸比为4.0的原纤维，微纤维和纳米纤维的层级形态微观结构得到了发展。在由无添加剂的聚丙烯纺成的长丝中，层状堆叠与原纤维形态的缔合发生的时间相当晚，拉伸比在2.0和4.0之间。在这些长丝中发现取向的层状结构，拉伸比仍为4.0。

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