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含能材料  2015 

PET/N-100黏合剂体系的交联网络结构完整性分析

DOI: 10.11943/j.issn.1006-9941.2015.10.005

Keywords: 端羟基环氧乙烷/四氢呋喃无规共聚醚(PET) 物理交联 氢键 交联网络结构完整性 黏合剂 韧性 校正因子

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Abstract:

用单轴拉伸测试、红外光谱、溶胀平衡法分析了端羟基环氧乙烷/四氢呋喃无规共聚醚(PET)与多官能度异氰酸酯(N-100)黏合剂胶片的力学性能、物理交联程度、交联网络结构完整性及韧性。结果表明:随着固化参数(R)值的增大,PET/N-100黏合剂胶片的交联密度逐渐增加,交联点间的链段平均分子量逐渐减小,拉伸强度和弹性模量逐渐增大,断裂伸长率逐渐减小。其交联网络完整性与氢键比例成正比,与N-100含量成反比。当R值为1.2时,PET/N-100黏合剂胶片的剪切模量校正因子D最大,交联网络结构完整性最好,力学性能较佳且韧性也最大

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