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.
作者
方永勤
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)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
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)。
关键词
自修复
环氧
聚硫橡胶
嵌段结构
涂层应用
self-healing
epoxy
polysulfide
block structure
coating application
