ICCAS OpenIR
Shear-induced orientation in the crystallization of an isotactic polypropylene nanocomposite
Sun, Tongchen1,2,3; Chen, Fenghua1,2; Dong, Xia1,2; Zhou, Yong1,2,3; Wang, Dujin1,2; Han, Charles C.1,2
2009-05-22
Source PublicationPOLYMER
ISSN0032-3861
Volume50Issue:11Pages:2465-2471
AbstractIsothermal crystallization of isotactic polypropylene (iPP)/organic montmorillonite (OMMT) binary composite under shear field was investigated by in situ polarized optical microscopy, rheometry and transmission electron microscopy. When shear strain was small, shear flow could enhance the crystallization of iPP, and the crystallizing entity was spherulitic in iPP/OMMT composite in which the OMMT content was below the percolation threshold. With shear strain increasing, the orientation extent became stronger and cylindrites and strings of spherulites appeared in these samples. However, for iPP/OMMT composite with OMMT content higher than the percolation threshold, when the shear strain was not big enough to destroy the fillers network in the matrix, the crystallization of iPP was similar with that of the un-sheared sample. When shear strain was large enough, the fillers network was destroyed and clay layers were aligned along the flow direction. There formed oriented crystals including cylindrites and strings of spherulites, which were much smaller in size than those formed in the previous case, because the aligned clay layers acted as heterogeneous nucleation agents to promote crystallization of iPP. (C) 2009 Elsevier Ltd. All rights reserved.
KeywordShear-induced Crystallization Polypropylene Nanocomposite Rheology
DOI10.1016/j.polymer.2009.03.048
Indexed BySCI
Language英语
WOS IDWOS:000266319100016
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66690
Collection中国科学院化学研究所
Corresponding AuthorDong, Xia
Affiliation1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Sun, Tongchen,Chen, Fenghua,Dong, Xia,et al. Shear-induced orientation in the crystallization of an isotactic polypropylene nanocomposite[J]. POLYMER,2009,50(11):2465-2471.
APA Sun, Tongchen,Chen, Fenghua,Dong, Xia,Zhou, Yong,Wang, Dujin,&Han, Charles C..(2009).Shear-induced orientation in the crystallization of an isotactic polypropylene nanocomposite.POLYMER,50(11),2465-2471.
MLA Sun, Tongchen,et al."Shear-induced orientation in the crystallization of an isotactic polypropylene nanocomposite".POLYMER 50.11(2009):2465-2471.
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