论文部分内容阅读
采用聚乙烯固相接枝马来酸酐共聚物 (PE g MAH)做粉末涂层 ,考察了接枝率、交联度以及碳钢的不同表面处理方式对极性化聚乙烯涂层性能的影响 ;研究了在PE g MAH中加入双官能团环氧化合物 (EP)的方法作用和效果 ,并以粘度突变和差热分析 (DSC)法探讨了环氧化合物及其潜伏性固化剂、促进剂对涂层 /碳钢界面性能的影响。结果表明 ,PE g MAH与碳钢粘接力比PE大 ,PE g MAH中接枝率越高 ,粘接强度越大 ,但受到交联度的限制 ;在PE g MAH中加入EP并辅以适量的潜伏性固化剂和促进剂 ,可形成PE接枝环氧共聚物 (PE g EP) ,显著提高了涂层 /碳钢的界面粘接力 ;适当的磷化处理可进一步提高涂层 /碳钢的界面性能
Polyethylene grafted maleic anhydride copolymer (PE g MAH) was used for powder coating. The effects of grafting degree, crosslinking degree and different surface treatments of carbon steel on the properties of polar polyethylene coating The effect and mechanism of adding bifunctional epoxy compounds (EPs) to PE g MAH were studied. The effects of epoxy compounds and latent curing agents and accelerators on the properties of PE g MAH were studied by means of viscosity mutation and differential thermal analysis (DSC) Effect of coating / carbon steel interface properties. The results showed that the adhesion of PE g MAH to carbon steel was larger than that of PE, the higher the graft ratio in PE g MAH, the greater the adhesive strength but limited by the degree of crosslinking; the addition of EP in PE g MAH Appropriate amount of latent curing agent and accelerator, can form PE grafted epoxy copolymer (PE g EP), significantly improve the coating / carbon steel interfacial adhesion; appropriate phosphating can further improve the coating / Carbon steel interface properties