Solid State Carbon-13 NMR Studies of Vulcanized Elastomers. III, Accelerated Sulfur Vulcanization of Natural Rubber
Solid State Carbon-13 NMR Studies of Vulcanized Elastomers. III, Accelerated Sulfur Vulcanization of Natural Rubber
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硫化弹性体的固态碳 13 NMR 研究。
DOI：
10.5254/1.3536130
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发表时间：
1987
影响因子：
1.5
通讯作者：
J. Koenig
中科院分区：
文献类型：
--
作者：
A. Zaper;J. Koenig
总之，固态C-13 NMR技术已被证明是检测加速硫磺硫化NR体系中交联和其他结构变化的重要方法。当促进剂的量与所使用的硫的量成比例时，网络结构似乎更简单，具有较少的交联、较少的主链结构改性和较少的环状硫化物结构，如在C-13 NMR光谱中观察到的。除了由促进剂残基封端的多硫化物外，还检测到多硫化物交联。顺式到反式链异构化在这些硫化橡胶中也是明显的。
Abstract In summary, the solid state C-13 NMR technique has proven to be a significant method for the detection of crosslinks and other structural modifications in accelerated sulfur-vulcanized NR systems. When the amount of accelerator is high in proportion to the amount of sulfur used, the network structure appears to be simpler with less crosslinking, less main chain structural modification, and fewer cyclic sulfide structures as observed in the C-13 NMR spectra. Polysulfidic crosslinks have been detected in addition to polysulfides terminated by accelerator residues. Cis-to-trans chain isomerization is also evident in these vulcanizates.