乙醇在聚氨酯/乙烯基酯树脂互穿网络中的吸收动力学及传递分析

The Transport Phenomena of Ethanol in the Membrane of Polyurethane /Vinyl Ester Resin Interpenetrating Polymer Networks

采用石英弹簧称重法测定了乙醇在几种聚氨酯(PU)/乙烯基酯树脂互穿网络(IPN)中的吸收动力学数据, 用蠕变传递模型对实验数据进行关联, 并对IPN的微观结构进行了分析。结果表明: 乙醇在PU/含仲羟基的乙烯基酯树脂(CBIPN)膜和PU/正丁醇接枝乙烯基酯树脂(HBIPN)膜中的D远大于在PU膜和PU/不含仲羟基的乙烯基酯树脂(PIPN)膜中的D, 关联得到的CBIPN和HBIPN膜的杨氏模数也远大于纯PU和PIPN膜,与其它实验结果相吻合, 说明在网络间引入化学键或氢键作用能有效地改善聚氨酯/乙烯基酯树脂互穿网络的相容性, 从而提高材料的力学性能。

The absorption kinetics of ethanol in several polyurethane(PU) / vinyl ester resin interpenetrating polymer network membranes was measured by quartz spring weighing method and correlated by Liu et al.s creep transport model. The microstructures of interpenetrating polymer networks were analyzed through the correlated results[8]. It is shown that the mean diffusion coefficientsDof ethanol in membrane of PU/ vinyl ester resin including hydroxy group (CBIPN) and of PU/ vinyl ester resin branching with n-butanol (HBIPN) were much larger than that in membrane of PU and of PU/ vinyl ester resin without hydroxy group (PIPN). Meanwhile the YONGs modules of CBIPN and HBIPN membranes were much larger than that of PU and PIPN membranes too. These results are consistent with that obtained by other experimental methods[6]. The strong interaction between polyurethane network and vinyl ester resin network such as chemical bond and hydrogen bond can enhance the compatibility of IPN and reinforce its mechanic properties obviously.