陕西师范大学学报（自然科学版）2026，Vol.54Issue(1)：94-102,9.DOI:10.15983/j.cnki.jsnu.2026010
基于氨基树脂-环氧树脂交联固化体系的无皂苯丙树脂性能研究
Study on the properties of soap-free styrene-butadiene-acrylate resin based on amino resin-epoxy resin crosslinking and curing system
摘要
Abstract
A stable styrene-acrylic emulsion with high hydroxyl content was successfully synthesized via soap-free emulsion polymerization.A dual cross-linking system was constructed by incorporating epoxy resin E-51 and amino resin,with systematic investigation on the performance optimization mechanism of cross-linked films.The self-emulsification was achieved through water-soluble monomers including acrylic acid,methacrylic acid,and poly(ethylene glycol)methyl ether methacrylate.By choosing the soft/hard monomer ratio(mbutyl acrylate∶mstyrene=1∶2),the theoretical glass transition temperature of copolymer reached 45 ℃.Experimental results demonstrated that when the mass curing ratio of epoxy resin E-51 to styrene-acrylic emulsion was 20∶1,the cross-linked film exhibited optimal comprehensive performance with continuous and compact surface morphology.Under this condition,pencil hardness significantly improved to 5 H,dry/wet adhesion enhanced to grade 0.24-hour water absorption rate decreased to 2.5％,representing 66.6％reduction compared to epoxy-free system.The corrosion potential elevated to-0.079 V and the corrosion current density reduced to 9.2 × 10-4 mA/cm2.The tensile strength reached 1.8 MPa,increasing by 137％.The initial decomposition temperature rose to 235.7 ℃.The synergistic cross-linking between amino resin and epoxy resin,through ring-opening reactions of epoxy groups with carboxyl groups and etherification of alkoxy groups with hydroxyl groups,effectively reduced hydrophilic groups and formed a dense network structure.This mechanism significantly enhanced the chemical resistance and mechanical properties of the coating,thus providing novel insights for developing high-performance environmentally friendly water-based metal baking paints.关键词
无皂苯丙乳液/环氧树脂E-51/氨基树脂/交联固化/水性金属烤漆Key words
soap-free styrene-acrylic emulsion/epoxy resin E-51/amino resin/crosslinking curing/water-based metal baking paints分类
化学化工引用本文复制引用
谭伏奎,龚林波,龚淑玲..基于氨基树脂-环氧树脂交联固化体系的无皂苯丙树脂性能研究[J].陕西师范大学学报（自然科学版）,2026,54(1):94-102,9.基金项目
国家自然科学基金(52373104) （52373104）
