【摘要】 以甲苯二异氰酸酯、聚氧化丙烯二醇、氨乙基氨丙基聚二甲基硅氧烷为原料在无溶剂条件下合成了有机硅改性聚氨酯预聚体 ,用红外光谱对其进行了表征。以 3,3′ 二氯 4 ,4′ 二氨基 二苯基甲烷复合固化剂固化得氨基硅油改性聚氨酯材料 ,对材料的力学性能、耐热性、表面水接触角测试等表明 ,改性聚氨酯在ω(氨基硅油 ) =3%～ 15 %时 ,有较明显的改性效果 ,且在ω(氨基硅油 ) =10 %时 ,具有最佳综合性能 ,其拉伸强度和伸长率较未改性的分别提高 31%和 5 2 % ,表面水接触角提高了 2 3° ,耐热性也有所提高更多还原

【Abstract】 A series of modified polyurethane preoligomers with different amino siloxane content were synthesized by reaction of aminoethyl-aminopropyl poly(dimethyl siloxane)(AEAPS) with toluene diisocyanate and polyoxypropylene glycol and characterized by FT-IR. The modified polyurethane materials were prepared by the reacting the preoligomers with curing agent 3,3′-dichloro-4,4′-diamino-diphenylmethane(MOCA). The properties of materials were examined by stress-strain analysis, thermal resistance analysis and surface water contact angle measurement. The siloxane modified polyurethanes with 10%(mass fraction) AEAPS revealed the best comprehensive properties in comparison with the pure polyurethanes, the strain and stress were improved by 31% and 52% respectively, and the water contact angle increased by 23°.更多还原