Abstract

Modification of the rheological and thermal properties of polypropylene (PP) was accomplished through the in-situ generation of PP/poly(trimethylene terephthalate) (PTT) nanocomposites fibrils containing organoclay via a melt spinning process. The development of the fibrillar structures in the fibers during the melt spinning and a subsequent hot drawing process was confirmed by scanning electron microscopy; the lowest mean diameter of the nano-fibrils was 74 nm for the hot drawn nanocomposite fibers consisting of 10 wt.% of PTT and 1 wt.% organoclay in the PP. The results of wide-angle X-ray diffraction and differential scanning calorimetry indicated that the presence of the 10 wt.% of PTT and 1 wt.% organoclay in the nanocomposite fibers led to an approximately 16% increase in the crystallinity of the PP, compared to pure PP fibers. The distribution of the organoclay in the nanocomposites was investigated using transmission electron microscopy and small-angle X-ray scattering.

摘要

聚丙烯（PP）的流变学和热学性能的改性是通过熔融纺丝工艺原位生成包含有机粘土的PP /聚对苯二甲酸丙二醇酯（PTT）纳米复合原纤维来完成的。通过扫描电子显微镜证实了在熔体纺丝和随后的热拉伸过程中纤维中纤维状结构的发展。对于由10重量％的PTT和1重量％的PP中的有机粘土组成的热拉伸纳米复合纤维，纳米原纤维的最低平均直径为74nm。广角X射线衍射和差示扫描量热法的结果表明，纳米复合纤维中10 wt。％的PTT和1 wt。％的有机粘土的存在导致PP的结晶度增加了约16％，与纯PP纤维相比。