丙烯酸酯/有机硅接枝改性水性环氧树脂的合成研究  

Study on synthesis of acrylic ester/organosilicon modified waterborne epoxy resin

作　　者：沈一丁[1] 吕鑫[1] 费贵强 王海花[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2016年第6期81-86,92,共7页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(21204046;51373091);教育部留学回国人员科研基金项目(2012(1707));陕西省教育厅重点实验室科研计划项目(14JS014;2011JS057)

摘　　要：通过环氧树脂与丙烯酸、甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸羟丙酯和有机硅氧烷单体乙烯基三乙氧基硅烷接枝共聚反应,在环氧树脂分子上引入亲水性羧基和有机硅氧烷单元,生成丙烯酸酯/有机硅改性水性环氧树脂.采用红外光谱(FTIR)、核磁共振(NMR)表征了接枝产物的结构;并用原子力显微镜(AFM)、示差扫描量热仪(DSC)、热重分析仪(TGA)分析了涂膜表面形貌,玻璃化转变温度和热稳定性.探讨了不同质量分数的有机硅单体对水性环氧树脂乳液固化涂膜微观结构与宏观性能的影响.结果表明,当有机硅单体为环氧树脂质量分数的3%时,乳液粒径为140nm,固化涂膜吸水率为7.9%,铅笔硬度为4H,附着力为0级,玻璃化转变温度为81.4℃,结构均一致密,耐热性增强.Modified epoxy resin was prepared through graft copolymerization between epoxy resin and mixture monomers such as Acrylic acid（AA）,Methyl methacrylate（MMA）,Butyl acrylate（BA）,Hydroxypropyl acrylate（HPA）and organosilicon monomer trithoxyvinylsilane（A-151）.As a result,hydrophilic carboxyl and organosilicone unit were incorporated into epoxy molecules and then acrylate/organosilicone modified waterborne epoxy resin was produced.The structure of modified epoxy was characterized by infrared spectroscopy（FTIR）and nuclear magnetic resonance（NMR）,The surface morphology,glass-transition temperature and thermal stability of epoxy coating with different organosilicone contents were determined by atomic force microscope（AFM）,differential scanning calorimetry（DSC）and thermal gravimetric analyzer（TGA）respectively.Effects of organosilicone content on the microstructure and properties of epoxy coatings were discussed.The results showed that the particle size of emulsion was 140 nm when the organosilicone content was 3%（based on the weight of epoxy resin）,water absorption of cured film decreased to 7.9%,pencil hardness reached 4H,adhesive force was 0level,and glass-transition temperature was 81.4 ℃.In addition,the coating displayed as uniform and compact structure and endowed with remarkable heat resistance.

关 键 词：水性环氧树脂 丙烯酸酯 有机硅 接枝共聚 

分 类 号：TQ316.343[化学工程—高聚物工业]