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两组份互穿网络聚合物的合成研究 总被引:1,自引:0,他引:1
以蓖麻油聚氨酯和聚醚聚氨酯的不同重量比与光敏剂、催化剂、稀释剂、促进剂所组成的多相体系为反应物,分别在紫外光照射和加热的条件下合成网络Ⅰ和网络Ⅱ的互穿网络聚合物(IPN)。改变网络Ⅱ聚醚聚氨酯中各组份的摩尔比制得系列样品。红外光谱,应力-应变曲线和动态力学性能测定发现,样品的力学性能与两组份重量比和网络Ⅱ中不同组成都存在着一定关系。这些结果,为该体系IPN的合成和应用提供了一定依据。 相似文献
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A new series of Interpenetrating polymer networks (IPN) was prepared by using both free radical and cationic photoinitiators simultaneously under ultraviolet radiation. The systems studied were castor oil based ure'thane acrylates (Network I) and epoxy resin (Network II) (UV-IPN). In order to compare the effect of different crosslinking operations, urethane-acrylate/ amine cured epoxy resin (AC-IPN) and urethane-acrylate/epoxy-acrylate conetwork (EA-CPN) systems were also synthesized and their dynamic mechanical and stress-strain properties were examined. The results show that UV-IPN exhibits only one Tan δ peak,while two Tan δ peaks can be seen in AC-IPN systems. This suggests that the former is much more compatible than the later.The stress at break was found to increase as epoxy resincomponent increased in both UV-IPN and AC-IPN,while appeared to decrease in EA-CPN as epoxy-acrylate increased. 相似文献
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互穿网络聚合物的进展 总被引:1,自引:0,他引:1
在这篇文章中,我们首先简要地叙述了互穿网络聚合物的定义和类型,还进一步说明了它们特殊的性质与结构形态的关系。并且概要介绍了相稳定性理论,最后讨论了近年来 IPN 研究方法的新进展。 相似文献
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紫外光固化蓖麻油型聚氨酯-甲基丙烯酸羟乙酯网络聚合物的合成 总被引:4,自引:1,他引:3
本工作对蓖麻油/甲苯二异氰酸酯(TDI)/甲基丙烯酸羟乙酯(HEMA)形成的预聚体和不同的活性稀释剂以不同的光敏剂在紫外光照射下的产物进行了红外光谱和力学性能的测定。结果表明:该体系能形成很好的网络聚合物。所有的产品不仅透明度高,而且都具有一定的机械强度,但仍具有两相结构。 相似文献
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