BPO与TBPB引发丙烯酸酯聚合对树脂性能的影响

Influence of TBPB and BPO Initiator on the Properties of Acrylic Resins

分别使用BPO和TBPB作为引发剂,引发丙烯酸酯单体聚合反应制备了丙烯酸酯树脂,详细研究了使用2种不同引发剂引发对树脂黏度、相对分子质量大小和分布的影响。分别用2种树脂配漆,在马口铁板上喷涂制板,干燥后测试漆膜的光泽、附着力、柔韧性和耐冲击性等机械性能,并把用2种树脂制备好的马口铁漆板放入QUV紫外光老化机中,测试紫外光照射对漆膜颜色和光泽随时间的变化,并进行对比研究。根据实验结果得出结论:用液体引发剂TBPB代替固体引发剂BPO,树脂相对分子质量更小,相对分子质量分布更窄,漆膜的耐候性能更好。

The polyacrylate resins were synthesized with two different initiators respectively, t- butyl peroxide benzoate （TBPB） and benzoyl peroxide （BPO）. The influence of initiators on the properties of the obtained resins and coatings was studied in detail, including viscosity, molecular weight and distribution of the resins. Coatings were formulated with these two resins, which were applied on tinplate to test the gloss, adhesion, flexibility and impact strength, etc. after dried in QUV chamber, the paint films were tested with gloss and color change over time. Conclusion from the experiments ： use liquid initiator TBPB instead of solid initiator BPO to prepare resin which can show smaller molecular weight, narrower molecular weight distribution and better paint weatherability.