活性稀释剂对环氧树脂固化及固化环氧涂层性能的影响,Journal of Coatings Technology and Research

您所在的位置:网站首页 环氧稀释剂692和AGE哪个更好 活性稀释剂对环氧树脂固化及固化环氧涂层性能的影响,Journal of Coatings Technology and Research

活性稀释剂对环氧树脂固化及固化环氧涂层性能的影响,Journal of Coatings Technology and Research

2024-07-12 08:26| 来源: 网络整理| 查看: 265

通过 DSC 和振荡流变仪研究了单官能、双官能和三官能活性环氧稀释剂 (RD) 对胺固化剂固化环氧树脂的影响。已确定含有双官能团 RD 的环氧树脂的固化以最低的活化能Ea为特征。,并且固化反应是一级的。固化下最短的胶凝时间是含有双官能团 RD 的环氧树脂的特征,而含有双官能团或三官能团 RD 的固化环氧树脂的玻璃化时间相似。使用双官能 RD 作为环氧树脂的一部分是最有利的,因为它们促进了固化过程,从而能够更快地达到高度固化。不同官能度的RDs对玻璃化转变温度T g的影响固化的环氧树脂和环氧涂层的机械性能明显但很小。RD 的功能对环氧涂层的附着力和柔韧性没有显着影响。含有双官能团 RD 的固化环氧树脂涂层的特点是硬度略高,耐磨性提高。双官能反应性环氧稀释剂通过促进固化过程和改善固化环氧涂层的机械性能显示出用于环氧配方的巨大潜力。

"点击查看英文标题和摘要"

The effect of reactive diluents on curing of epoxy resins and properties of the cured epoxy coatings

The effect of monofunctional, difunctional, and trifunctional reactive epoxy diluents (RDs) on curing of epoxy resins by amine hardeners was studied by DSC and oscillatory rheometry. It was determined that curing of the epoxy resins containing difunctional RD was characterized by the lowest activation energy Ea, and the cure reaction was of first order. The shortest gelation time under curing was characteristic for the epoxy resins containing difunctional RDs, while vitrification time of the cured epoxy resins containing difunctional or trifunctional RDs was similar. The use of difunctional RDs as a part of epoxy resins was the most advantageous since they facilitated curing process enabling to reach high degree of curing faster. The effect of RDs of various functionalities on glass transition temperature Tg of the cured epoxy resins and mechanical properties of the epoxy coatings was noticeable but small. Functionality of RDs had no noticeable effect on adhesion and flexibility of the epoxy coatings. Coatings of the cured epoxy resins containing difunctional RD were characterized by slightly higher hardness and increased abrasion resistance. Difunctional reactive epoxy diluents show great potential to be used in epoxy formulations by facilitating curing process and improving mechanical properties of the cured epoxy coatings.



【本文地址】


今日新闻


推荐新闻


CopyRight 2018-2019 办公设备维修网 版权所有 豫ICP备15022753号-3