化工学报2012，Vol.63Issue(8)：2629-2634,6.DOI:10.3969/j.issn.0438-1157.2012.08.041
异氰酸酯/环氧树脂的固化机理
Curing mechanism of isocyanate/epoxy resin
摘要
Abstract
The curing reaction of bisphenol A epoxy resin and isocyanate was carried out and the curing mechanism was investigated. Differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) were used to monitor and analyze quantitatively the decrease of the groups of isocyanate, epoxy group and generation of new groups of isocyanurate and oxazolidone. The DSC results showed that three reactions mainly occurred during the curing process of epoxy/isocyanate system corresponding to three exothermic peaks. The FTIR results indicated that when reaction temperature was below 140℃ trimerization of isocyanate groups into isocyanurate was observed; when temperature was up to 200℃ the formation of oxazolidone ring by the reaction between epoxy and isocyanate occurred; when temperature was above 230℃ the transformation reaction of isocyanurate with epoxide group to oxazolidone occurred. The curing reaction time dependence of the conversions of epoxide, isocyanate, isocyanurate, oxazolidone groups at different temperature were studied.关键词
异氰酸酯/环氧树脂/异氰脲酸酯/(哑)唑烷酮/固化机理Key words
isocyanate/ epoxy/ isocyanurate/ oxazolidone/ curing mechanism分类
化学化工引用本文复制引用
左浚茹,程珏,林欣,张军营..异氰酸酯/环氧树脂的固化机理[J].化工学报,2012,63(8):2629-2634,6.基金项目
国家自然科学基金项目(21176017) （21176017）
国家高技术研究发展计划项目(2012AA03A205) （2012AA03A205）
江苏省科技支撑项目(BE2010066) （BE2010066）
常州微电子化学材料公共工业技术平台项目(CZ2010003). （CZ2010003）
