首页> 外文期刊>Journal of the Serbian Chemical Society >Determination of silanol end groups in polysiloxanes obtained from dimethyldichlorosilane hydrolysate (DDSH)
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Determination of silanol end groups in polysiloxanes obtained from dimethyldichlorosilane hydrolysate (DDSH)

机译:由二甲基二氯硅烷水解物(DDSH)获得的聚硅氧烷中硅烷醇端基的测定

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摘要

Dimethyldichlorosilane hydrolysate, DDSH, the linear part of which contains SiOH end groups, can be used in the preparation of difunctionally terminated (any end groups other than SiOH) polysiloxanes via equilibration polymerisations. In such a case, the problem arises: as to whether the obtained functionalised polymers also contain silanol end groups. To the best of our knowledge, the only direct and the most precise analytical procedure to clarify this question is the Karl Fischer titration/determination of SiOH groups. This determination was performed on a model system consisting of trimcthylsilyl terminated polysiloxanes, and it was shown that the obtained polymers contained no SiOH groups.
机译:二甲基二氯硅烷水解物DDSH(其线性部分包含SiOH端基)可用于通过平衡聚合反应制备双官能封端的(除SiOH以外的任何端基)聚硅氧烷。在这种情况下,出现问题:关于所获得的官能化聚合物是否还包含硅烷醇端基。据我们所知,唯一可以直接,最精确的分析程序来阐明这一问题是卡尔·费休滴定/测定SiOH基团。该确定是在由三甲基甲硅烷基封端的聚硅氧烷组成的模型系统上进行的,结果表明所获得的聚合物不含SiOH基团。

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