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用一步本体法合成了聚醚氨酯/环氧树脂(PU/EP)互穿聚合物网络(IPN)。以透射电镜(TEM)、红外光谱(FT-IR)及动态粘弹仪(TOYO Baldwin Rheovibron DDV-Ⅲ-EA)对IPN体系前进行了表征,并以自行设计的悬臀梁法测量了该体系的阻尼性能。结果表明:PU/EPIPN中PU和EP两高分子网络间存在着强物理相互作用——互穿作用而无化学相互作用。互穿作用的大小依赖于PU/EP原料配比、PU交联密度、PU软段长度、PU扩链剂结构及未固化EP的本体粘度等因素;该IPN体系的阻尼温域宽(大于100℃)且阻尼值高(tgδ大于0.4),是性能优越的阻尼材料。由表征结果对该IPN体系的形成过程进行了探讨,提出了互穿——迁移相竞争的概念。
A polyether urethane / epoxy (PU / EP) interpenetrating polymer network (IPN) was synthesized by one-step ontology. The IPN system was characterized by transmission electron microscopy (TEM), infrared spectroscopy (FT-IR) and dynamic viscoelasticity (TOYO Baldwin Rheovibron DDV-Ⅲ-EA), and the system was measured by a self-designed method Damping performance. The results show that PU / EPIPN PU and EP polymer networks exist between the strong physical interaction - interpenetrating without chemical interaction. The size of the interpenetrating effect depends on factors such as PU / EP ratio, PU cross-link density, PU soft segment length, PU chain extender structure and bulk viscosity of uncured EP. The IPN system has a wide temperature range (greater than 100 ℃) and high damping value (tgδ greater than 0.4), is a superior damping material. The formation process of this IPN system is discussed from the characterization results, and the concept of interpenetrating-migrating phase competition is proposed.