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首页> 外文期刊>RSC Advances >Self-gradient mechanism, morphology and damping analysis of a thickness continuous gradient epoxy–polyurethane interpenetrating polymer network
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Self-gradient mechanism, morphology and damping analysis of a thickness continuous gradient epoxy–polyurethane interpenetrating polymer network

机译：厚度连续梯度环氧 - 聚氨酯互穿聚合物网络的自梯度机理，形态和阻尼分析

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摘要

A simple and affordable gradient-distributing interpenetrating polymer network (IPN) composite was created that takes advantage of the relatively poor compatibility and the curing rate discrepancy between epoxy (EP) and polyurethane (PU) resins. Organic element content analysis (CHNS/O) and attenuated total reflection infrared spectroscopy (ATR-FTIR) reveal that the PU content is a gradient that changes along the direction of the thickness. Morphology analysis by scanning electron microscopy (SEM) and atomic force microscopy (AFM) proves that it has a continuously changing modulus with no stratified structure. Dynamic thermomechanical analysis (DMA) and fatigue testing demonstrate that the composite has better performances than traditional homogeneous IPNs with the same compositions.
机译：产生简单且价格合理的梯度分布的互穿聚合物网络（IPN）复合材料，其利用相对差和环氧（EP）和聚氨酯（PU）树脂之间的固化速率差异。有机元素含量分析（CHNS / O）和衰减的全反射红外光谱（ATR-FTIR）揭示了PU含量是沿厚度方向变化的梯度。通过扫描电子显微镜（SEM）和原子力显微镜（AFM）的形态分析证明它具有不断变化的模量，没有分层结构。动态热机械分析（DMA）和疲劳试验表明，复合材料比具有相同组成的传统均质IPN具有更好的性能。

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