Oriented Crystallization in Polypropylene Fibers Induced by a Sorbitol-Based Nucleator
Oriented Crystallization in Polypropylene Fibers Induced by a Sorbitol-Based Nucleator
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DOI：
10.1021/ma071387u
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发表时间：
2008
期刊：
影响因子：
5.5
通讯作者：
J. Lipp;M. Shuster;G. Feldman;Y. Cohen
中科院分区：
文献类型：
--
作者：
J. Lipp;M. Shuster;G. Feldman;Y. Cohen
研究了 1,3:2,4-二（3,4-二甲基亚苯亚甲基）山梨醇 (DMDBS) 在聚丙烯 (PP) 纤维熔体纺丝过程中诱导定向结晶的作用，涉及纤维的拉伸性能和晶体取向（WAXS、SAXS）。在 DMDBS 纳米纤丝在 PP 熔体中充分发育的条件下，DMDBS 含量为 0.4%（w/w）时获得了更好的取向和更高的杨氏模量。建议在聚丙烯结晶之前通过剪切和拉伸流动定向的纳米原纤维作为其后续结晶的成核中心。
The role of 1,3:2,4-di(3,4-dimethylbenzylidene)sorbital (DMDBS) in inducing oriented crystallization during the melt spinning of polypropylene (PP) fibers has been investigated, regarding the tensile properties and crystal orientation (WAXS, SAXS) of the fibers. Better orientation and higher Young's modulus were obtained at a content of 0.4% (w/w) DMDBS, under conditions in which the DMDBS nanofibrils are fully developed in the PP melt. It is suggested the nanofibrils, oriented by the shear and elongational flow prior to PP crystallization, serve as nucleation centers for its subsequent crystallization.