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将原位插层聚合与聚合物互穿技术相结合,制备了有机蒙脱土改性的聚氨酯/环氧树脂互穿网络纳米复合材料.差示扫描量热法(DSC)分析表明,随着有机蒙脱土含量的增加,纳米复合材料的玻璃化温度先升高后降低.溶胀法、傅里叶红外光谱(FTIR)、X射线衍射(XRD)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)分析结果表明,有机蒙脱土改变了聚氨酯/环氧树脂互穿网络的交联密度及氢键指数,促进了聚氨酯与环氧树脂互穿网络结构的形成,同时妨碍了聚氨酯硬段的结晶.
In-situ intercalation polymerization and interpenetrating polymer technology were used to prepare interpenetrating polyurethane / epoxy resin nanocomposites modified by montmorillonite.The results of differential scanning calorimetry (DSC) The glass transition temperature of nanocomposites increased firstly and then decreased with the increase of montmorillonite content.The swelling and Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy TEM) results showed that the organic montmorillonite changed the crosslink density and hydrogen bond index of the polyurethane / epoxy interpenetrating network, promoted the formation of interpenetrating network structure between polyurethane and epoxy resin, and hindered the formation of polyurethane hard segment crystallization.