含炔基酚醛树脂的合成与表征

Novel Ethynyl-containing Novolac Resins-synthesis and Characterization

研究了普通Novolac线性酚醛、氨催化resol型酚醛的炔丙基化树脂的简便合成;采用FTIR、 HNMR、GPC等表征了其分子结构;研究影响热固化过程的因素(分子量、炔基含量、羟甲基含量)和典型树 脂的固化动力学。黏度测定、DMA、TGA等分析结果表明该类树脂具有良好的工艺性,100℃的黏度不超过 400mPa·s;树脂可以在200～250℃进行热固化;热固化物耐热性比传统酚醛树脂有明显改进,DMA表明树 脂固化物具有高达370℃的玻璃化温度,TGA则表明其初始热分解温度在400℃以上;XRD结果表明树脂固 化物的碳化物是典型的玻璃碳。

This paper reports the convenient synthesis of propargyl modified novolac and resol resins.Molecular structures are characterized by FTIR, HNMR and GPC methods.The effects of molecular weights, ethynyl contents and methylol contents on thermal cure and cure kinetics of typical propargyl resins are also reviewed. The results show that novel resins have excellent processability.The viscosities at 100℃ are not higher than 400 mPa·s.The resins can be thermally cured at 200℃ to 250℃.The cured materials improve thermal stability.DMA analysis shows their T g are up to 370℃ and TGA show initial decomposition temperatures are higher than 400℃.XRD results of carbon from the cured materials show these carbon materials are typical glass carbon.