双组分室温硫化硅橡胶胶粘剂的改性研究

来源 :西南科技大学 | 被引量 : 0次 | 上传用户:li5301251975
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近年来,国内外关于室温硫化硅橡胶胶粘剂的研究大多是针对单组份室温硅橡胶胶粘剂及应用,关于双组份室温硫化硅橡胶粘剂相对较少。随着现代武器的发展,硅橡胶胶粘剂的优越性引起了人们的关注,室温硫化硅橡胶结构稳定,具有良好的热稳定性、卓越的耐老化性以及突出的阻尼特性,因此其在武器设备领域具有明显的优越性,但硅橡胶分子间的相互作用力弱,内聚能低导致其粘接强度低,使其在特殊装备方面的应用受到了限制。 本文对双组份室温硫化硅橡胶胶粘剂进行了初步的改性研究,提高了硅橡胶胶粘剂的粘接强度。采用原位聚合法,以羟基封端的缩合型室温硫化硅橡胶为基础胶,选用甲基丙烯酸酯、自制聚氨酯、MQ硅树脂三种改性室温硫化硅橡胶,结合偶联剂、白炭黑有效提高了双组份室温硅橡胶粘胶剂的粘接力,最高达5.64MPa。同时结合一定分析手段测定了改性硅橡胶胶粘剂的结构、分子量、耐温性、填料分散性等物理化学性质,探索了改性胶粘剂组份用量、制备工艺等对硅橡胶胶粘剂性能的影响,确定了较佳的制作工艺。
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