【摘要】 使用双酚A型环氧乙烯基酯树脂(VER)与双酚F型环氧树脂(EP)同步固化的方法对环氧树脂进行增韧改性。研究了共混体系的固化反应过程、力学和热性能以及形态结构。结果表明,当环氧树脂与乙烯基酯树脂的质量比为90∶10时,所得到的树脂体系在韧性提高的同时,耐热性能(Tg)也有明显的提高,获得了一种兼具韧性和耐热性能的树脂基体。更多还原

【Abstract】 A bisphenol-F-epoxy resin (EP) toughening was performed by incorporating bisphenol-A-vinyl ester resin (VER) and cured simultaneously with it to form an interpenetrating polymer network (IPN). The curing behavior of the blend systems has been studied by using differential scanning calorimetry (DSC). The mechanical property changes of the systems with the content of the VER have also been investigated. Meanwhile, dynamical mechanical thermal analysis (DMTA) and scanning electron microscope (SEM) were used to determine the dynamic mechanical properties and heat resistance and to observe the microstructures of the IPN samples, respectively. The result shows that the IPNs formed by simultaneously curing the EP and VER blend with a VER content of 10% are contribute to both the toughness and heat resistance, with the impact strength and glass transition temperature (T_g) increased by 616% and 25 ℃, respectively.更多还原