Characterization of ethylene-propylene-diene terpolymers (EPDM) by 750 MHz on-line SEC-NMR

被引：22
|
作者：
Ute, K
Niimi, R
Hatada, K
Kolbert, AC
机构：
[1] Osaka Univ, Grad Sch Engn Sci, Dept Chem, Toyonaka, Osaka 5608531, Japan
[2] DSM Copolymer, Baton Rouge, LA 70821 USA
来源：
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION | 1999年 / 5卷 / 01期
关键词：
SEC; NMR; LC-NMR; molecular weight distribution; chemical composition; ethylene-propylene rubber;
D O I：
10.1080/10236669908014173
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Chemical compositions of ethylene-propylene-(2-ethylidene-5-norbornene) terpolymers were investigated by size exclusion chromatography coupled directly to 750 MHz H-1 NMR (on-line SEC-NMR). Comparison of the chromatograms obtained by monitoring the CH2 and CH3 resonances in a terpolymer sample showed clearly that ethylene/propylene ratio depends on molar mass. The measurements were carried out with continuous flow of eluent (chloroform-d, 0.2 mL/min), Molar mass dependence of a small amount (0.6-1.1 mol%) of 2-ethylidene-5-norbornene units in a terpolymer was determined by SEC-NMR using the stop-and-flow technique.
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页码：47 / 59
页数：13
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