ICCAS OpenIR
Synthesis and morphological structure of crystalline syndiotactic 1,2-polybutadiene
Chen, Y; Yang, DC; Hu, YM; Zhang, XQ
2003-11-01
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN0251-0790
Volume24Issue:11Pages:2119-2121
AbstractThe 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.
KeywordSynthesis Morphological Structure Transmission Electron Microscopy Syndiotactic 1 2-polybutadiene
Indexed BySCI
Language英语
WOS IDWOS:000186799000051
PublisherHIGHER EDUCATION PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80728
Collection中国科学院化学研究所
Corresponding AuthorYang, DC
Affiliation1.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
Recommended Citation
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.
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