Synthesis and morphological structure of crystalline syndiotactic 1,2-polybutadiene

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	Synthesis and morphological structure of crystalline syndiotactic 1,2-polybutadiene
	Chen, Y ; Yang, DC ; Hu, YM ; Zhang, XQ
刊名	CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
	2003-11-01
卷号	24 期号:11 页码:2119-2121
关键词	Synthesis Morphological Structure Transmission Electron Microscopy Syndiotactic 1 2-polybutadiene
ISSN号	0251-0790
英文摘要	The crystalline syndiotactic 1,2-polybutadiene was synthesized in a catalytic system consisting of iron acetylacetonate [Fe(acac)3], triisobutylaluminum [Al(i-Bu)(3)] and diethyl phosphite (DEP), and its morphological structure was investigated by transmission electron microscopy (TEM). The polymer with a melting point 179 degreesC was found to have 89.3% 1,2 polybutadiene and 86.5% syndiotacticity based on C-13 NMR measurements. The bright field electron micrograph shows that the solution cast film of syndiotactic 1, 2-polybutadiene consists of lamellae with lateral scale in micron size. It should be noted that the lamellae have no branching and they are almost parallel each other in localized areas. The lamellar growing direction is along b axis. Surprisingly, the electron diffraction pattern of the film only exhibits strong (hko) reflections, which indicate that the lamellae possess a single crystal-like orientation, i. e., with their c axis perpendicular to the film plane, while a and b axes in the film plane. According to the orthorhombic packing of plane zigzag chains, the cell parameters calculated from the electron diffraction pattern are a=1. 102 nm, b=0.664 nm, respectively, which are completely consistent with the results reported by Natta et al.
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000186799000051
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/80727]
专题	中国科学院化学研究所
通讯作者	Yang, DC
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Engn Lab, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Chen, Y,Yang, DC,Hu, YM,et al. Synthesis and morphological structure of crystalline syndiotactic 1,2-polybutadiene[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2003,24(11):2119-2121.
APA	Chen, Y,Yang, DC,Hu, YM,&Zhang, XQ.(2003).Synthesis and morphological structure of crystalline syndiotactic 1,2-polybutadiene.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,24(11),2119-2121.
MLA	Chen, Y,et al."Synthesis and morphological structure of crystalline syndiotactic 1,2-polybutadiene".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 24.11(2003):2119-2121.