Rapid, catalyst‐free crosslinking of silicones using triazines,Journal of Polymer Science

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Rapid, catalyst‐free crosslinking of silicones using triazines
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-06-23 , DOI: 10.1002/pol.20200289
Ayodele Fatona ₁ , Andrew Osamudiamen ₁ , Jose Moran‐Mirabal ₁ , Michael A. Brook ₁

Affiliation

Silicone elastomers are a class of polymers that are typically cured with metal‐based catalysts. There is a need to reduce the presence of metals in polymers for both cost and environmental reasons. We describe the preparation of amino‐triazinyl silicone networks that are readily formed, without catalysts, from aminopropyl silicones and cyanuric chloride or, more practicably, a pre‐modified dichlorotriazinyl silicone (a masterbatch). The amine groups serve both as nucleophiles leading to crosslinks and to neutralize the HCl byproduct of the reaction. Elastomer properties, ranging from very soft gels to rigid elastomers, could be controlled simply by choice of the telechelic or pendant aminopropylsilicones that were added to the masterbatch. The presence of amines and ammonium ions in the products do not significantly affect the high stability of the elastomers toward hydrolytic or thermal oxidative stress.

中文翻译：

使用三嗪快速，无催化剂地交联有机硅

有机硅弹性体是一类聚合物，通常使用金属基催化剂进行固化。出于成本和环境的原因，需要减少金属在聚合物中的存在。我们描述了氨基-三嗪基有机硅网络的制备，该网络很容易在没有催化剂的情况下由氨基丙基有机硅和氰尿酰氯或更实际地由预改性的二氯三嗪基有机硅（母料）形成。胺基既充当亲核试剂，导致交联并中和反应的HCl副产物。弹性体的性能，从非常软的凝胶到刚性弹性体，都可以通过选择添加到母料中的远螯或悬垂的氨基丙基硅氧烷来控制。

更新日期：2020-06-23

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