水利工程用环氧树脂改性聚氨酯丙烯酸酯性能研究
Study on the Performances of Epoxy-Resin-Modified Polyurethane Acrylate for Water Conservancy Projects
李贵勋 1李硕硕 2孔令辉 1刘书潭 1张雷1
作者信息
- 1. 黄河水利委员会黄河水利科学研究院,河南 郑州 450003;河南省水电工程磨蚀测试与防护工程技术研究中心,河南 郑州 450003
- 2. 郑州大学材料科学与工程学院,河南 郑州 450052
- 折叠
摘要
水利工程金属结构和水工建筑物常遭受腐蚀、高速含沙水流磨蚀破坏,需对其进行便捷有效的防护.利用环氧树脂对聚氨酯丙烯酸酯(PUA)进行改性提高PUA与基体黏结性能,采用紫外光(UV)固化技术制备PUA涂层.研究了环氧树脂改性PUA的化学结构及环氧树脂用量对PUA的力学性能、热稳定性能、耐溶剂性能和抗冲磨性能的影响.结果表明,环氧树脂改性PUA的拉伸强度随着环氧树脂用量增加,呈下降趋势,当加入5%时,PUA拉伸强度为103.0 MPa,材料呈强而脆的特性.环氧树脂加入提升了PUA的拉伸剪切强度,由0.25 MPa增至1.60 MPa.同时,环氧树脂改性PUA具有良好的耐水性能、耐溶剂性能、抗冲磨性能,5%环氧树脂改性PUA抗冲磨强度为800 h/(kg·m2).
Abstract
Metal structures and hydraulic buildings of water conservancy projects are often suffered from corrosion and abrasion damage,and convenient and effective protection should be carried out.Polyurethane acrylate(PUA)was modified by using epoxy resin and the adhesion performance between PUA and matrix was improved.The PUA coating was formed by using ultraviolet(UV)curing technology.The chemical structure of epoxy-resin-modified PUA and the effects of the addition of epoxy resin on the mechanical properties,thermal stability,solvent resistance and impact wear resistance were investigated.The results show that the tensile strength of epoxy-resin-modified PUA decreases with the increase of epoxy resin dosage.When the mass fraction of epoxy resin is 5%,the tensile strength of PUA reaches 103.0 MPa.The material exhibits strong and brittle characteristics.The tensile shear strength of PUA increases from 0.25 MPa to 1.60 MPa with the addition of epoxy resin.At the same time,epoxy-resin-modified PUA has good water resistance,solvent resistance and impact wear resistance.The impact wear strength of PUA containing epoxy resin with a mass fraction of 5%is800 h/(kg·m2).
关键词
聚氨酯丙烯酸酯/环氧树脂/涂层/黏结/抗冲磨/紫外光固化Key words
Polyurethane Acrylate/Epoxy Resin/Coating/Adhesion/Impact Wear Resistance/UV Curing引用本文复制引用
基金项目
河南省自然科学基金面上项目(222300420496)
出版年
2024
NETL
NSTL
万方数据