细旦聚丙烯卷绕丝的结晶结构与其后拉伸性能的关系  

The Relationship Between the Crystalline Forms and Drawing Properties of Fine Polypropylene As-spun Filaments

作　　者：张瑜[1] 朱美芳[1] 陈彦模[1] 

机构地区：[1]中国纺织大学,中国纺织大学材料科学与工程学院

出　　处：《功能高分子学报》1995年第1期85-91,共7页Journal of Functional Polymers

摘　　要：应用电子计算机对一系列细旦聚丙烯卷绕丝样品的大角Ｘ射线衍射图进行分峰处理，发现用常规熔融纺丝制得的聚丙烯卷绕丝的Ｘ射线衍射曲线可以分解成六个峰：一个非晶峰，对应于α晶型的三个典型峰（２θ值分别为１４．０°，１６．８°，１８．５°），对应于次晶的典型的二个峰（２０＝１５．２°，２１．４°）。对样品中所含次晶和α晶相对含量与其后拉伸性能相互关系的研究结果表明：卷绕丝次晶对α晶的相对含量越高，后拉伸性能越好。这将有助于选择合适的纺丝工艺条件，制备具有优良物理机械性能的细旦聚丙烯长丝。series of WAXS Patterns of fine polypropylene as-spun filaments were resolved by the use of a computer. It was found that a general diffraction curve of PP as-spun filaments could be resolved into peaks in which include one amorphous peak, the typical three peaks corresponding to the α-form at 2θ=14.0°,16.8°, 16.8° and 18.5°, and the typical two peaks corresponding to the smectic form at 2θ = 15.2°and 21.4°. The relationship between the relative percent of the two crystal forms (α and smectic form) inthe filaments and the drawing properties are discussed. The result is useful for selecting the appropriatemelt spinning conditions in order to obtain the fine PP fibre with the good mechanical properties.

关 键 词：卷绕丝 晶型 拉伸性能 聚丙烯 

分 类 号：O632.12[理学—高分子化学] O631.21[理学—化学]