环氧苯丙树脂的制备及有机-无机杂化膜的性能

The preparation of the epoxy styrene acrylic resin and the performance of the organic-inorganic hybrid films

摘要:

为了改善膜的附着力、稳定性及力学性能，采用自由基溶液聚合法制备了环氧苯丙树脂，并将此树脂与无机钛溶胶进行复配制得一种新型有机-无机杂化膜。讨论了工艺条件对树脂合成的影响，利用傅里叶变换红外光谱（FT-IR）、高效液相凝胶渗透色谱（GPC）、差示扫描量热分析（DSC）、热重（TG）等手段对共聚物及有机-无机杂化膜性能进行了表征。结果表明，以单体总质量14 %的过氧化苯甲酰（BPO）为引发剂，反应温度为 90℃，N-羟甲基丙烯酰胺量为1.5 %，软硬单体配比为1：1时，制得了数均分子量为6923、重均分子量17213及多分散性为2.48的环氧改性苯丙树脂。与环氧苯丙树脂膜相比，有机-无机杂化膜具有较好的综合性能，所得涂膜的附着力1级，硬度为5H，耐水性、耐盐水性及耐酸性等各项性能优异

Abstract:

In order to improve the adhesion, stability and mechanical properties of the films, the epoxy styrene acrylic resin was synthesized by free radical solution polymerization ,and then blended with an inorganic Titanium sol to prepare a novel organic-inorganic hybrid films . The main factors influencing the resin synthesis were studied. The composition and structure of the resin and the organic-inorganic hybrid films were characterized by FT-IR, GPC, DSC, TG. It was found that the epoxy styrene acrylic resin with a number-average molecular weight of 6923, a weight-average molecular weight of 17213 and the polydispersity of 2.48 was obtained with 14% (relative to total monomer weight) benzoyl peroxide(BPO) as initiator, 1.5%(relative to total monomer weight) N - methylol acrylamide (NMA) as crosslinking agent and the hard and soft Monomer ratio of 1:1 at a reaction temperature of 90℃. In summary , the organic-inorganic hybrid films has better comprehensive performance compared with the epoxy styrene acrylic resin films , the films features good resistance to water ,saline ,and acid ,adhesion strength of 1 grade and pencil hardness of 5H .