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以三异丙醇胺(TIPA)为交联剂制备了不同交联度的阳离子型水性聚氨酯(CWPU).用红外表征其结构,并分别对CWPU乳液的粒径分布和胶膜的机械性能、热学性能以及耐水性进行了测试.结果表明:随着TIPA含量的增加,CWPU乳液的平均粒径先减小后增大,胶膜硬度增加,拉伸强度增大,软段玻璃化转变温度提高,耐水性和耐热性提升.当TIPA加入量为1.80%时,胶膜机械性能最优,拉伸强度达17.5 MPa,硬度达邵D65,耐热性也最好;当TIPA加入含量为1.35%时,胶膜耐水性最好,96h吸水率为4.2%,并且乳液粒径较小,较适合作木器封底漆.

参考文献

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