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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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聚碳硅烷纤维在环己烯气氛中的不熔化处理
Abstract:
？将聚碳硅烷(pcs)纤维在环己烯气氛中进行化学气相交联不熔化处理,其氧含量比空气不熔化处理大大降低,组成和结构也发生了变化,气体副产物中存在环己烷和小分子硅烷.在环己烯气氛中,随着温度的升高,pcs分子的si-h键的反应程度逐渐提高,纤维的凝胶含量逐渐增大.环己烯受热引发pcs分子中的si-h和si-ch3键断裂生成si自由基和si-ch2自由基,促进pcs分子间形成si-ch2-si交联结构;同时,环己烷作为侧基引入到pcs分子结构中,使纤维的碳含量随之增高.随着反应温度的升高,部分环己烷侧基和少量小分子硅烷会从pcs分子主链脱出.
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