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Polymorphism in polypropylene fibers

机译：聚丙烯纤维的多态性

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The structure of polypropylene fibers formed by different spinning conditions was studied. The investigations were carried out using wide-angle X-ray scattering (WAXS) and small-angle X-ray scattering (SAXS) methods. It was stated that in noncolored fibers the mesophase and the monoclinic a forms were formed. The highest content of the mesophase was observed for fibers extruded at the higher temperature and taken at the medium take-up velocity. In fibers colored with quinacridone pigment the structure containing the monoclinic a and the trigonal 0 forms was obtained. The highest content of the 0 form occurred in fibers taken at the lowest take-up velocity. The increase of the take-up velocity caused a rapid drop in 0 form content. In fibers taken at higher velocities only the a form was formed. It was found that the content of different forms as well lamellar thickness depends on crystallization conditions, which were influenced by the formation parameters. (C) 2003 Wiley Periodicals, Inc. [References: 43]
机译：研究了不同纺丝条件下聚丙烯纤维的结构。研究使用广角X射线散射（WAXS）和小角X射线散射（SAXS）方法进行。据说在无色纤维中形成了中间相和单斜晶a形式。对于在较高温度下挤出并以中等吸收速度吸收的纤维，观察到中间相的含量最高。在用喹ac啶酮颜料着色的纤维中，获得了包含单斜晶a和三角0形式的结构。 0形式的最高含量出现在以最低卷绕速度吸收的纤维中。卷绕速度的增加导致0形式含量的快速下降。在以较高速度采集的纤维中，仅形成α形式。发现不同形式的含量以及层状厚度取决于结晶条件，该结晶条件受形成参数的影响。 （C）2003 Wiley Periodicals，Inc. [参考：43]

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