ICCAS OpenIR
Effect of copolymerized ethylene unit on the crystallization behavior of poly(propylene-co-ethylene)s
Wang, S; Yang, DC
2004-10-13
Source PublicationPOLYMER
ISSN0032-3861
Volume45Issue:22Pages:7711-7718
AbstractThe crystallization behavior of two kinds of commercial poly(propylene-co-ethylene)s (PPE1, PPE2) with similar average molecular weight and molecular weight distribution, isotacticity and copolymerized ethylene unit content and their fractions was investigated by differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and polarized optical microscopy (POM) techniques. The results indicate that the PPE1 isothermally crystallized films possess thicker and less cross-hatched lamellar structure than those of the PPE2. As for the fractionated samples, the thin films of low temperature (less than or equal to 90 degreesC) fractions (PPE1-80, PPE2-80) of both PPE1 and PPE2 exhibit similar crystallization behavior, while for the high temperature ( greater than or equal to 95 degreesC) fractions (PPE1-108, PPE2-108), the crystalline morphology has marked differences. Compared with PPE2-108, the PPE1-108 isothermally crystallized thin films possess thicker lamellae and less crosshatched lamellar structure, while for the fibrous crystal number, the former is less than that of the latter. The main reason to create the crystallization behavior differences between the two PPEs and their fractions is due to the effect of molecular chain structure, i.e. the different distribution of copolymerized ethylene unit in polypropylene chains. (C) 2004 Elsevier Ltd. All rights reserved.
KeywordPoly(propylene-co-coPolymer) Crystallization Morphology
DOI10.1016/j.polymer.2004.09.007
Indexed BySCI
Language英语
WOS IDWOS:000224497900035
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81884
Collection中国科学院化学研究所
Corresponding AuthorYang, DC
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Wang, S,Yang, DC. Effect of copolymerized ethylene unit on the crystallization behavior of poly(propylene-co-ethylene)s[J]. POLYMER,2004,45(22):7711-7718.
APA Wang, S,&Yang, DC.(2004).Effect of copolymerized ethylene unit on the crystallization behavior of poly(propylene-co-ethylene)s.POLYMER,45(22),7711-7718.
MLA Wang, S,et al."Effect of copolymerized ethylene unit on the crystallization behavior of poly(propylene-co-ethylene)s".POLYMER 45.22(2004):7711-7718.
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