二苯醚异氰酸酯聚醚氨酯的合成及性质

SYNTHESIS AND PROPERTIES OF POLYETHERURETHANES BASED ON 4,4'-DIPHENYLETHER DIISOCYANATE

合成了以聚四氢呋喃(PTMO)为软段,4,4’-二异氰酸二苯醚(ODI)和不同扩链剂[乙二胺(EDA、丁二醇(BD)、N,N-二羟乙基甲胺(MDEA)]为硬段的链段型聚氨酯。并通过MDEA的第三胺和γ-丙磺酸内酯反应,转化为双离子型离聚体。用差示扫描量热、动态力学性能、应力-应变以及紫外老化等实验方法研究了化学组成和氨磺化程度对材料相分离程度、力学性能和形态结构的影响。

Three series of segmented polyurethanes were synthesized which are based on 4,4'-oxydi (phenyl isocyanate) (ODI) , hydroxy terminated polytetramethylene oxide (PTMO) (1000 molecular weight) and ethylene diamine (BDA) . butandiol-1,4 (BD) , N-methyldiethano-lamine(MDEA).The tertiary amine of MDEA was sulfonated with γ-propane sultone there by converting the polyurethane into zwitterionomer.The effects of the chemical composition and the level of ammonium sulfonation on the extent of phase separation, physical properties, and morphologies were studied. Using differential scanning calorimetry, dynamic mechanical analysis, stress-strain testing.The ageing stability of the material was also studied.