ICCAS OpenIR
Stress-induced structure transition of syndiotactic polypropylene via melt spinning
Zhang, Xiuqin; Li, Rongbo; Kong, Lei; Wang, Dujin
2008-03-03
Source PublicationPOLYMER
ISSN0032-3861
Volume49Issue:5Pages:1350-1355
AbstractSyndiotactic polypropylene (sPP) fiber was prepared by melt spinning with the taken-up velocity of 200-700 m/min, the conformation and crystallization of which were systematically investigated by a combination of Fourier transform infrared (FTIR) spectroscopy, wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). The results indicated that sPP fibers consist of form I crystal with helical conformation at the spinning velocity of 200-300 m/min, and the crystallinity and orientation are improved with the increase of spinning velocity in this range. As the spinning velocity exceeds 300 m/min, sPP fibers contain mainly mesophase with trans-planar conformation and the content of form I decreases correspondingly. The crystallization behavior of sPP fiber with spinning velocity is different from that of most other crystalline polymers, i.e., the theory of orientation-induced crystallization is not well conformed to. For sPP, form I comprising of helical conformation is thermodynamically stable, though extensional stress can lead to transition from helical to trans-planar conformation, which is not favorable for the crystallization of form 1. (C) 2008 Elsevier Ltd. All rights reserved.
KeywordSyndiotactic Polypropylene Structure Transition Melt Spinning
DOI10.1016/j.polymer.2008.01.019
Indexed BySCI
Language英语
WOS IDWOS:000254356400027
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63696
Collection中国科学院化学研究所
Corresponding AuthorWang, Dujin
AffiliationChinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat,Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xiuqin,Li, Rongbo,Kong, Lei,et al. Stress-induced structure transition of syndiotactic polypropylene via melt spinning[J]. POLYMER,2008,49(5):1350-1355.
APA Zhang, Xiuqin,Li, Rongbo,Kong, Lei,&Wang, Dujin.(2008).Stress-induced structure transition of syndiotactic polypropylene via melt spinning.POLYMER,49(5),1350-1355.
MLA Zhang, Xiuqin,et al."Stress-induced structure transition of syndiotactic polypropylene via melt spinning".POLYMER 49.5(2008):1350-1355.
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