ICCAS OpenIR
Translation and Rotation of Spherulites during the Crystallization of Isotactic Polypropylene with Reduced Chain Entanglements
Wang, Xuehui1,2; Wang, Zhigang1,3; Luo, Kaifu1; Huang, Yong2
2011-04-26
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume44Issue:8Pages:2844-2851
AbstractThe isothermal crystallization of isotactic polypropylene (iPP) spherulites was observed under chain entanglements, reduced chain entanglements, and unconfined thick film conditions using polarized optical microscopy (POM). While spherulite translations and rotations were not observed in entangled iPP samples, the growing spherulites in the entanglements-reduced crystallizing melt conspicuously translated and/or rotated, even when their sizes exceeded the sample film thicknesses. Our entanglements-reduced samples were prepared by first slowly crystallizing a commercial entangled iPP in mineral oil (and then extracting the mineral oil with hexane) and by a direct polymerization method, respectively. The purity of the entanglements-reduced iPP samples and the extent of chain entanglements were examined by thermogravimetric analysis (TA), gel permeation chromatography (GPC), and rheological measurements. Our findings seem to provide new clues into the crystallization of high molecular mass polymers.
DOI10.1021/ma1025913
Indexed BySCI
Language英语
WOS IDWOS:000289593200055
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71658
Collection中国科学院化学研究所
Corresponding AuthorWang, Zhigang
Affiliation1.Univ Sci & Technol China, CAS Key Lab Soft Matter Chem, Dept Polymer Sci & Engn, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xuehui,Wang, Zhigang,Luo, Kaifu,et al. Translation and Rotation of Spherulites during the Crystallization of Isotactic Polypropylene with Reduced Chain Entanglements[J]. MACROMOLECULES,2011,44(8):2844-2851.
APA Wang, Xuehui,Wang, Zhigang,Luo, Kaifu,&Huang, Yong.(2011).Translation and Rotation of Spherulites during the Crystallization of Isotactic Polypropylene with Reduced Chain Entanglements.MACROMOLECULES,44(8),2844-2851.
MLA Wang, Xuehui,et al."Translation and Rotation of Spherulites during the Crystallization of Isotactic Polypropylene with Reduced Chain Entanglements".MACROMOLECULES 44.8(2011):2844-2851.
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