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

被引：0

作者：

Fang Y. ^{[1
]}

Lü M. ^{[1
]}

Xu L. ^{[2
]}

机构：

[1] Design Research Institution of Changzhou University, Changzhou

[2] Changzhou Finechemical Insititute, Changzhou

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2022年 / 38卷 / 11期

关键词：

Block structure; Coating application; Epoxy; Polysulfide; Self-healing;

D O I：

10.16865/j.cnki.1000-7555.2022.0250

中图分类号：

学科分类号：

摘要：

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. © 2022, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：28 / 33

页数：5

共 14 条

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