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	Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications
	Gou, Qingqiang; Li, Huihui; Yu, Zhenqiang; Chen, Erqiang; Zhang, Yudong; Yan, Shouke
刊名	Colloid and polymer science
	2007-07-01
卷号	285期号:10页码:1149-1155
关键词	Alpha-ipp Gamma-ipp Crystallization Dsc Waxd Afm
ISSN号	0303-402X
DOI	10.1007/s00396-007-1669-x
通讯作者	Yan, shouke(skyan@iccas.ac.cn)
英文摘要	A random propylene-based copolymer containing 1.0 mol% 1-butene as co-unit, synthesized with ziegler-natta catalyst and then fractionated to make the sample having a uniform in molecular microstructure, was investigated by differential scanning calorimetry (dsc), wide-angle x-ray scattering (waxd), and atomic force microscopy (afm). in the dsc curves, one can see clearly the endothermic peaks corresponding to the melting of alpha-ipp crystals and a group of broad endothermic peaks associated to the melting of the gamma-ipp crystals. wide-angle x-ray diffraction results indicate that both the alpha and gamma modifications can be formed in the copolymer in a wide temperature range. the gamma fraction increases first with increasing the crystallization temperature at the expense of its alpha component, which has been explained according to crystalline structures of ipp in its alpha and gamma forms, and then decreases with increasing crystallization temperature as the crystallization of ipp in its gamma phase has been suppressed at high temperatures. the gamma-ipp content in the copolymer reaches maximum at the temperature of 130 degrees c. the in situ x-ray diffraction characterization on the isothermal crystallization process at 130 degrees c indicates that, as long as the gamma-ipp can be detected, it takes always ca. 25% of the overall crystallinity. this leads to the conclusion that alpha- and gamma-ipp crystals grow simultaneously during the crystallization process. the fact that the alpha and gamma phases cannot be distinguished by morphological observation leads to the conclusion that they may intermix within one spherulite.
WOS关键词	WEIGHT ISOTACTIC POLYPROPYLENE ; FORM ; PHASE ; MORPHOLOGY ; POLYMORPH ; POLYMERS ; CHAIN ; RATES
WOS研究方向	Chemistry ; Polymer Science
WOS类目	Chemistry, Physical ; Polymer Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000247783900010
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2380298
专题	中国科学院大学
通讯作者	Yan, Shouke
作者单位	1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 2.SINOPEC, Beijing Res Inst Chem Ind, Beijing 100013, Peoples R China 3.Peking Univ, Sch Chem, Dept Polymer Sci, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Gou, Qingqiang,Li, Huihui,Yu, Zhenqiang,et al. Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications[J]. Colloid and polymer science,2007,285(10):1149-1155.
APA	Gou, Qingqiang,Li, Huihui,Yu, Zhenqiang,Chen, Erqiang,Zhang, Yudong,&Yan, Shouke.(2007).Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications.Colloid and polymer science,285(10),1149-1155.
MLA	Gou, Qingqiang,et al."Crystallization behavior of a propylene-1-butene random copolymer in its alpha and gamma modifications".Colloid and polymer science 285.10(2007):1149-1155.

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