【摘要】 研究了适于纺制高收缩聚丙烯纤维的树脂的性能特点。添加改性组分共混纺丝可以进一步提高所得纤维的热收缩性。对热收缩聚丙烯纤维的聚集态结构特点和热收缩过程中的结构变化进行了研究。结果表明 :结晶速率小的聚丙烯树脂所得纤维的热收缩率高 ,添加适当的改性剂共混纺丝得到了收缩率近 30 %的聚丙烯纤维 ;具有潜在热收缩性的聚丙烯纤维聚集态结构具有结晶度低、晶粒尺寸小、非晶区取向程度高的特点 ,热收缩过程是结晶度变大、晶粒尺寸变大、结构趋于完善的过程。更多还原

【Abstract】 In this paper structures and properties of thermal shrinkage PP fiber were studied. The results showed that the fiber prepared by PP resin of low rate of crystallization possessed higher rate of shrinkage and a shrinkage of 30% was obtained by using the PP resin blended with certain amount of modifiers. It was observed that PP resins with high potential shrinkability showed a lower degree of crystallization, smaller crystal size and higher degree of orientation in the amorphous regions. During the process of the shrinkage, the degree of crystallization and the crystal size were increased resulting in an increase of the extent of crystalline perfection of the PP fibers.更多还原