CAJ | 학술논문

以二乙醇胺、环氧E-44树脂等为原料,合成叔胺结构中间体,与溴乙烷反应制得季铵盐型水性环氧树脂乳化剂,以相反转技术乳化环氧树脂E-44.研究了乳化剂合成过程中反应温度、反应时间和环氧基转化率的关系;探讨了乳化剂用量对水性环氧树脂水分散性,稳定性及固化性能的影响.利用红外光谱对产物的结构进行了表征.结果表明:二乙醇胺与环氧E-44树脂在80 ℃反应3 h,环氧基转化率可达98%以上;乳化剂用量为ω=22%时其乳化效果及所制得乳液的稳定性最好.DSC和TG分析结果表明,水性环氧树脂乳液和工业环氧树脂E-44比较,固化后热性能基本一样,分解温度约在350 ℃,但其玻璃化转变温度有所降低,说明其韧性有一定提高.
이이을순알、배양E-44수지등위원료,합성숙알결구중간체,여추을완반응제득계안염형수성배양수지유화제,이상반전기술유화배양수지E-44.연구료유화제합성과정중반응온도、반응시간화배양기전화솔적관계;탐토료유화제용량대수성배양수지수분산성,은정성급고화성능적영향.이용홍외광보대산물적결구진행료표정.결과표명:이을순알여배양E-44수지재80 ℃반응3 h,배양기전화솔가체98%이상;유화제용량위ω=22%시기유화효과급소제득유액적은정성최호.DSC화TG분석결과표명,수성배양수지유액화공업배양수지E-44비교,고화후열성능기본일양,분해온도약재350 ℃,단기파리화전변온도유소강저,설명기인성유일정제고.
A kind of tertiary amine intermediate was prepared by the reaction of E-44 epoxy resin with diethanolamine, followed by reaction with bromoethane to give quaternary ammonium salt wa-ter-borne epoxy resin surfactants. The waterbome E-44 epoxy resin was prepared by the phase inversion technique. The rela-tionship between the conversion rate of epoxy group and the reac-tion time and temperature was studied.The effect of concentration of the emulsifier on water dispersibility, stability and curing prop-erties of the waterbome epoxy emulsion was also investigated.The structure of the polymer was characterized by FT-IR spec-troscopy. The results showed that upon the reaction of di-ethanolamine with epoxy resin E-44 at 80℃ the conversion rate of epoxy group could reach over 98% after the reaction had taken place for 3 h.The emulsifying performance and emulsion stability were the best when the amount of the emulsifier used was 22% . The DSC and TG analyses had shown that the thermal property of the waterborne epoxy emulsion and the epoxy resin E-44 after curing was similar, and decomposition occurred at about 350 ℃. The glass transition temperature of the waterbome epoxy emulsion was lower than that of epoxy resin E-44, as evidenced by its en-hanced toughness.