讨论以聚乙二醇为亲水软段,聚己二酸乙二酯为疏水软段的嵌段型APU(BAPU)的结构表征及其透湿性能.用调制温度示差扫描量热分析方法研究了BAPU的玻璃化转变,发现具有混合软段BAPU的玻璃化转变温度和热容增量均介于纯亲水和纯疏水性软段BAPU的相应值之间,透湿性能测定证明,BAPU的透湿系数随其亲水性及交联密度显著变化.
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