间位取代苯并噁嗪树脂的聚合行为和性能研究  

Study on polymerization behavior and properties of meta-substituted benzoxazine resin

作　　者：任士通 吴艾妍 童彤 田芳菁 杜永刚 Ren Shitong;Wu Aiyan;Tong Tong;Tian Fangjing;Du Yonggang(School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China;Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment,Shijiazhuang 050043,Hebei,China)

机构地区：[1]石家庄铁道大学材料科学与工程学院,河北石家庄050043 [2]河北省交通工程与环境协同发展新材料重点实验室,河北石家庄050043

出　　处：《中国胶粘剂》2024年第11期62-67,共6页China Adhesives

基　　金：河北省自然科学基金面上项目(E2021210060)。

摘　　要：苯并噁嗪树脂的聚合行为和性能与其分子结构密切相关。目前已有研究主要集中于对位取代基对苯并噁嗪树脂聚合行为和性能的影响,而关于间位取代苯并噁嗪树脂的研究较少。为了进一步探究苯并噁嗪树脂的结构-性能关系,本文分别以间位取代苯胺和间位取代苯酚为原料,制备了双官能苯并噁嗪树脂。利用傅里叶变换红外光谱(FT-IR)表征了其分子结构,通过差示扫描量热分析(DSC)和动态热机械分析(DMA)分别研究了不同结构苯并噁嗪树脂的聚合行为、热机械性能和热稳定性。研究结果表明:(1)分别由间位取代苯胺和间位取代苯酚成功合成了间位取代苯并噁嗪。(2)对于间位取代苯胺型苯并噁嗪,间位取代基的引入使苯并噁嗪的聚合温度降低;对于间位取代苯酚型苯并噁嗪,给电子的甲基取代基使苯并噁嗪的聚合温度明显升高,而吸电子的甲氧基和氯取代基使聚合温度明显降低,尤其是取代基为甲氧基时聚合温度最低。(3)间位取代基对于苯并噁嗪树脂的热机械性能的影响较为复杂。苯酚间位引入吸电子取代基使聚苯并噁嗪的热稳定性降低,芳香二胺型聚苯并噁嗪比二酚型聚苯并噁嗪具有更好的热稳定性。The polymerization behavior and properties of benzoxazine resin are closely related to its molecular structure.Current research has mainly focused on the effects of para-substituents on the polymerization behavior and properties of benzoxazine resin,while studies on meta-substituted benzoxazine resin are relatively scarce.In order to further investigate the structure-property relationship of benzoxazine resin,bis-functional benzoxazine resins using meta-substituted anilines and meta-substituted phenols as raw materials were prepared in this paper.The molecular structure of benzoxazine resin was characterized by Fourier transform infrared spectroscopy(FT-IR),and the polymerization behavior,thermomechanical properties,and thermal stability of different structures of benzoxazine resin were studied by differential scanning calorimetry(DSC)and dynamic thermomechanical analysis(DMA),respectively.The research results showed that,(1)Meta-substituted benzoxazines were successfully synthesized from meta-substituted anilines and meta-substituted phenols(.2)For meta-substituted aniline type benzoxazines,the introduction of meta-substituent lowered the polymerization temperature of benzoxazines.For meta-substituted phenol type benzoxazine,the electron-donating methyl substituent significantly increased the polymerization temperature of benzoxazines,while the electron-withdrawing methoxy and chlorine substituents significantly decreased the polymerization temperature,especially when the substituent was methoxy,the polymerization temperature was the lowest(.3)The influence of meta-substituents on the thermomechanical properties of benzoxazine resins was more complex.The introduction of electron-withdrawing substituents at the meta position of phenol reduced the thermal stability of the polybenzoxazine,and aromatic diamine type polybenzoxazine had better thermal stability compared to diphenol type polybenzoxazine.

关 键 词：间位取代 苯并噁嗪 聚合行为 热机械性能 

分 类 号：TB324[一般工业技术—材料科学与工程] TQ430.4[化学工程]