【摘要】 利用端氨基丁腈橡胶(ATBN)和韧性环氧树脂制备了一系列高力学强度的密封胶。力学性能测试结果表明,调节固化剂和补强填料的用量,可以得到一系列拉伸强度在5.6MPa~11.2MPa,伸长率在150%~550%之间的密封胶。丁腈橡胶中丙烯腈的含量越高,密封胶的断裂伸长率也越高,拉伸强度则在增加到一定程度后,基本保持不变。动态力学分析研究显示,该密封胶体系在软硬段的作用下,存在着两相结构。该密封胶具有优良的耐高低温和耐压缩性能。更多还原

【Abstract】 The performance of sealants based on liquid Amine-Terminated Butadiene Acrylonitrile(ATBN) and epoxy was outlined.The sealants have inherent resistance to high temperature and,in addition,exhibit high flexibility at temperatures as low as 253K due to their chemical structure the ATBN.Sealants based on this technology possess more excellent physical properties than traditional sealants such as low-molecular-weight polysulfide(Thiokols LP) sealants or silicon sealant.Dynamic mechanical analysis shows ATBN and epoxy form two phases in the sealants.The tensile strength and the ultimate elongation increase with increasing content of acrylonitrile of ATBN.Sealants based on ATBN show good properties on resistance to compression.更多还原