高效自修复聚硫-环氧材料的制备及修复性能  

Preparation and Repair Performance of Highly Efficient Self-Healing Polysulfide-Epoxy Materials

作　　者：方永勤[1] 吕梦力 许亮 Yongqin Fang;Mengli Lü;Liang Xu(Design Research Institution of Changzhou University,Changzhou 213164,China;Changzhou Finechemical Insititute,Changzhou 213004,China)

机构地区：[1]常州大学设计研究院,江苏常州213164 [2]常州精细化工研究所,江苏常州213004

出　　处：《高分子材料科学与工程》2022年第11期28-33,共6页Polymer Materials Science & Engineering

基　　金：江苏省研究生科研与实践创新计划(SJCX21_1226)。

摘　　要：为避免树脂力学强度和自修复性能间的冲突,合成了一系列具有嵌段结构的聚硫-环氧树脂,并制备了基于该树脂的自修复弹性体/涂层,研究了修复效率的影响因素和涂层的修复性能。自修复效率测试表明,弹性体最佳的原料配比为E20环氧树脂与LP-3聚硫橡胶的摩尔比=2∶1,固化剂为聚醚胺,并使用三乙胺催化修复过程。拉伸性能测试表明,固化后样品的拉伸强度为12.95 MPa,截断后经80℃-24 h修复可恢复93.5%,修复3次后拉伸强度未见衰减。中性盐雾测试表明,聚硫-环氧自修复涂层具有良好的防腐性能,表面划痕经修复后可耐受72 h中性盐雾,完好涂层可耐168 h盐雾,具有应用潜力。Here,a series of polysulfide-epoxy resins with block structure were prepared to avoid the conflict between the mechanical strength and self-healing properties.Besides,self-healing elastomers/coatings based on these resins were prepared to investigate the factors influencing the repair efficiency and self-healing properties in the applications.Self-repair efficiency tests indicate that the best raw material resins for the elastomer is E20 epoxy resin and LP 3 polysulfide rubber(mole ratio of 2:1),and the curing agent is polyetheramine D400.In addition,the catalyst plays an important role in repair process,and 1%triethylamine was utilized to catalyze the healing reaction.Tensile tests show that the tensile strength of the cured sample is 12.95 MPa,and the fractured sample can be repaired to 93%of original strength(repair conditions:80℃,24 h).The tensile strength of the elastomer doesn’t decay after three times of repair.The neutral salt spray test indicates that the polysulfide-epoxy self-healing coating possesses the excellent corrosion resistance and the scratched surface can withstand 72 h neutral salt spray after healing.Besides,the intact coating could withstand 168 h salt spray,which has application potential.

关 键 词：自修复 环氧 聚硫橡胶 嵌段结构 涂层应用 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]