Structural development during the early stages of polymer melt spinning by in-situ synchrotron X-ray techniques

被引：125
|
作者：
Schultz, JM [1 ]
Hsiao, BS
Samon, JM
机构：
[1] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA
[2] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA
来源：
POLYMER | 2000年 / 41卷 / 25期
关键词：
fiber spinning; in-situ study; synchrotron X-ray;
D O I：
10.1016/S0032-3861(00)00232-9
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Recent results from melt spinning of several polymers (nylon 6, polyethylene:, poly(vinylidene fluoride) using in-situ simultaneous synchrotron small- and wide-angle X-ray scattering (SWAXS) techniques are summarized. Here, mechanisms of early stages of structural and morphological development during crystallization under melt flow are probed. We find that a model consisting of the formation of defective shish-like structures, followed by the formation of kebab crystals is most consistent with our results. We have further verified that the defective shish structure cannot be detected by the wide-angle X-ray scattering (WAXS) technique, but is visible by small-angle X-ray scattering (SAXS). This model has been proposed by Keller et al., for structural development during elongational flow. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：8887 / 8895
页数：9
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