以聚丙醚(PPG)和甲苯二异氰酸酯(TDI)为原料,20%的二月桂酸二丁基锡邻苯二甲酸二甲酯溶液为催化剂,3,3′-二氯-4,4′-二氨基二苯甲烷(MOCA)和三羟甲基丙烷(TMP)作混合交联剂,通过浇注法得到用于极性分子印章制备的聚氨酯弹性体材料,其优化配方为:PPG,TDI和交联剂的摩尔比为1:2.5:0.90,交联剂中MOCA与TMP的摩尔比为5:1.这种聚氨酯材料,在乙腈或乙醇中浸泡2h,溶胀体积变化在0.5%以下;其机械硬度、抗拉强度和50%的压缩复原率分别为72HA、3.57MPa和99.6%.
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