含氰基和芴Cardo环结构双马来酰亚胺的设计合成和性能

Synthesis and Property of Bismaleimide Resins Containing Fluorene Cardo and Cyano Groups

使用9,9′-双(4-羟基苯基)芴和2,6-二氯苯甲腈为原料,合成了含有氰基和芴基结构的n≈1寡聚双马来酰亚胺(PFCBMI);使用红外光谱(FITR)和1H NMR等手段表征和分析了中间体和目标产物的化学结构。使用差示扫描量热仪(DSC)和热重分析仪(TGA)研究了PFCBMI的固化反应和固化物的热稳定性,还研究了PFCBMI/BDM共聚树脂。动态DSC的结果表明:随着PFCBMI含量的提高其固化特征参数均逐渐增大;TGA的结果表明:随着PFCBMI含量的提高交联密度降低使PFCBMI/BDM树脂体系的热分解特征参数均有所降低;动态热机械分析(DMA)结果表明:PFCBMI/BDM树脂基复合材料的储能模量约为10 GPa,玻璃化转变温度高于470℃,具有优异的耐热性。

One novel oligomeric BMI monomer of n ≈1 containing fluorene cardo and cyano groups(PFCBMI) was synthesized with 9,9′-bis[4-(4-maleimidophenoxy)phenyl] fluorine and dichlorobenzonitrile as raw materials. The chemical structure as well as the curing behavior and the thermal stability of the BMIs were characterized by means of 1 H NMR spectroscopy and Fourier transform infrared spectroscopy(FTIR) as well as dynamic differential scanning calorimeter(DSC) and thermogravimetric analysis(TGA). In addition, the copolymerizations of PFCBMI/BDM resins were investigated. Results show that the characteristic parameters of DSC curves for PFCBMI/BDM resin system increased with the increase of PFCBMI; The increase of PFCBMI leads to the decrease of the crosslink density and thus the decrease of the characteristic parameters for PFCBMI/BDM resins. Furthermore, the PFCBMI/BDM com-posites present excellent heat resistance with the storage modulus about 10 GPa and the glass transition temperature above 470°C.