Solid state carbon-13 NMR studies of silica-filled, TBBS-accelerated, sulfur vulcanized, cis-1,4 polyisoprene

被引：4

作者：

Hill, CM ^{[1
]}

Koenig, JL ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Macromol Sci, Cleveland, OH 44106 USA

来源：

POLYMER BULLETIN | 1998年 / 40卷 / 2-3期

关键词：

D O I：

10.1007/s002890050252

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The network formation of silica-filled, TBBS accelerated sulfur vulcanization of cis-1,4 polyisoprene (Natsyn 2200) was studied by solid state C-13 NMR spectroscopy, and equilibrium swelling measurements. Samples with varying silica levels at different stages of cure were analyzed. It was observed that silica retards the cure reaction, and results in an overall lower cure state. Silica also has an influence on the vulcanization chemistry causing an enhancement of the cis-trans isomerization, chain scission, and the formation of monosulfidic linkages. It was also determined that the polysulfidic linkages decreased as silica level was increased. Intermolecular crosslinks decreased, while intramolecular structures (including pendant side groups and cyclic sulfur structures) increased. Cross link density, as determined by swelling measurements, decreased as the silica level was increased.

引用

页码：275 / 282

页数：8

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