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利用化学接枝的方法将甲基丙烯酸缩水甘油酯及叔碳酸缩水甘油酯接枝到可再生原材料单宁酸上,制备了可UV固化的生物基超支化丙烯酸酯(BHAs)。通过环氧值测定、傅里叶红外光谱分析验证了接枝反应的进行;并通过凝胶渗透色谱分析了BHAs的分子量及分子量分布;采用实时红外研究了BHAs的光固化反应过程;考察了Q-panel铝板上BHAs固化涂膜的基本性能;同时以热重分析和差示扫描量热考察了固化膜的热稳定性(Td)及玻璃化转变温度(Tg)。结果表明,BHAs固化膜具有较高的硬度、附着力及热稳定性。
UV-curable bio-based hyperbranched acrylates (BHAs) were prepared by grafting glycidyl methacrylate and glycidyl versatate onto tannic acid, a renewable raw material, by chemical grafting. The grafting reaction was confirmed by the determination of epoxy value and Fourier transform infrared spectroscopy. The molecular weight and molecular weight distribution of BHAs were analyzed by gel permeation chromatography. The photocuring reaction of BHAs was studied by real time infrared. The effects of Q The basic properties of BHAs cured films on -panel aluminum were investigated. The thermal stability (Td) and glass transition temperature (Tg) of cured films were also investigated by thermogravimetric analysis and differential scanning calorimetry. The results show that BHAs cured films have high hardness, adhesion and thermal stability.