In Situ NMR Measurement of Novel Silicone Elastomer Obtained by Cross-Linking of Silicones Having Phenylene Backbone and Hyperbranched Molecular Architectures
In Situ NMR Measurement of Novel Silicone Elastomer Obtained by Cross-Linking of Silicones Having Phenylene Backbone and Hyperbranched Molecular Architectures
复制标题
通过具有亚苯基主链和超支化分子结构的有机硅交联获得的新型有机硅弹性体的原位核磁共振测量
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Yamanobe
中科院分区：
文献类型：
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作者：
H. Uehara;Masazumi Saitoh;Ryosuke Morita;Eiich Akiyama;T. Yamanobe
通过侧链含乙烯基的聚氧硅苯撑二硅氧烷与端硅氢超支化聚碳硅氧烷的热硅氢加成反应，制备了新型硅橡胶弹性体。原位测量使用固态1H NMR在加热交联反应期间进行。结果表明，交联反应在110 °C以上加速。两个重叠的反应机理反映了具有乙烯基的聚（氧硅亚苯基二硅氧烷）和SiH封端的超支化聚碳硅氧烷的特征分子结构。一个可能的结构模型，以满足这两种反应机制，提出了表征的交联反应的发展。
Novel silicone elastomer was obtained by cross-linking reaction of thermal hydrosilylation reaction between poly(oxysilphenylenesiloxydisiloxane) having vinyl groups in side chain and SiH-terminated hyperbranched polycarbosiloxane. In situ measurements using solid-state 1H NMR were performed during the cross-linking reaction on heating. The results suggest that the cross-linking reaction was accelerated beyond 110 °C. Two overlapping reaction mechanisms reflect the characteristic molecular structures of poly(oxysilphenylenesiloxydisiloxane) having vinyl groups and SiH-terminated hyperbranched polycarbosiloxane. A possible structural model to satisfy both reaction mechanisms is proposed to characterize the development of the cross-linking reaction.