OALib Journal期刊
ISSN: 2333-9721
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酚醛氰酸酯/环氧共固化树脂的结构和性能
Abstract:
?研究了具有不同摩尔比的酚醛型氰酸酯(nce)与双酚a型环氧(e-51)共固化树脂的化学结构与物理性能.结果表明,在共固化树脂的结构中,主要存在着三嗪、噁唑啉酮、异氰脲酸、醚键等化学结构.只有当氰酸酯的摩尔数大于环氧时,随着共固化体系中-ocn摩尔数的提高,化学结构中三嗪环含量增大,共固化树脂的力学性能、玻璃化转变温度(tg)、烧蚀残留率、吸水率随之提高;当-ocn/epoxy的摩尔比大于1时,固化树脂的tg比摩尔比小于1时提高30℃以上,力学性能的变化具有相同的规律.
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