液晶型聚氨酯弹性体的固体高分辨核磁共振研究
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摘要: 采用固体高分辨^13C核磁共振谱以及溶液碳谱、氢谱的方法对以聚四氢呋喃(PTMO)为软段、4,4'-二苯基甲烷二异氰酸酯(MDI)为硬段、4,4'-二羟已氧基联苯(HB6)为扩链剂的液晶型聚氨酯弹性体的相态结构、分子运动、氢键相互作用等问题进行了研究。探讨了样品的化学结构与上述问题间的关系。Abstract: he 13C CP/MAS,PST/MAS and DD/MAS NMR experiments were carried out on a mainchain liquid-crystalline polyurethane elastomer based on poly(tetramethylene oxid)(PTMO),4,4'-diphenylmethane diisocyanate(MDI)and 4,4'-bishydroxyhexyloxybiphenyl(HB6).The HB6 segm