ANALYSIS OF NMR TRIAD DISTRIBUTION IN ETHYLENE 1-BUTENE COPOLYMERS

被引:22
作者
CHENG, HN
机构
[1] Research Center, Hercules Incorporated, Wilmington, 19894, DE
关键词
15;
D O I
10.1007/BF01033103
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
For Ziegler-Natta polymers where the catalyst system can contain more than one active site, the analysis of NMR triad distribution data needs to be carried out with care. The best result is obtained when the NMR data of fractionated polymers are available. An analysis of the triad sequence distribution from the ethylene/1-butene copolymers indicate that the data are compatible with the occurrence of three discrete catalytic sites. © 1990 Springer-Verlag.
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页码:589 / 596
页数:8
相关论文
共 15 条
[1]  
ABIS L, 1986, MAKROMOL CHEM, V187, P1877
[2]  
ASAKURA T, 1987, POLYMER, V28, P1038
[3]  
CHENG HN, 1989, ACS SYM SER, V404, P174
[4]   C-13-NMR SEQUENCE DETERMINATION FOR MULTICOMPONENT POLYMER MIXTURES [J].
CHENG, HN .
JOURNAL OF APPLIED POLYMER SCIENCE, 1988, 35 (06) :1639-1650
[5]  
CHENG HN, 1987, J CHEM INF COMP SCI, V17, P8
[6]   ETHYLENE-PROPYLENE COPOLYMERS - REACTIVITY RATIOS, EVALUATION, AND SIGNIFICANCE [J].
COZEWITH, C ;
VERSTRAT.G .
MACROMOLECULES, 1971, 4 (04) :482-&
[8]  
DOI Y, 1982, MAKROMOL CHEM-RAPID, V3, P635
[10]   STUDIES OF THE STEREOSPECIFIC POLYMERIZATION MECHANISM OF PROPYLENE BY A MODIFIED ZIEGLER-NATTA CATALYST BASED ON 125 MHZ C-13 NMR-SPECTRA [J].
INOUE, Y ;
ITABASHI, Y ;
CHUJO, R ;
DOI, Y .
POLYMER, 1984, 25 (11) :1640-1644