摘要
以邻硝基乙苯为原料，通过四步反应合成出一种重要的N，N’4，4’-二苯甲烷双马来酰亚胺（BDM）衍生物——3，3’-二乙基4，4’-二苯甲烷双马来酰亚胺（BEDM）树脂，并利用FTIR和1^H NMR证实了其化学结构．BEDM样品的酸值为1．74mg（KOH）·g^-1．BEDM的熔点为203℃～204℃（数字显微熔点仪）或212℃（DSC），高于BDM的熔点．与BDM相比．BEDM的溶解性显著改善，可溶于丙酮、氯仿和乙醇等低沸点溶剂．同时，对BEDM的非等温固化反应动力学进行研究，计算其固化反应级数（n）为0．94，并得到频率因子（A）和反应常数（k）等数据．BEDM的固化反应活化能（E）比BDM的高，可能与其分子结构中的乙基所产生的空间位阻有关．上述结果为进一步研究和利用BEDM树脂提供了基础．
As one of the major derivatives of the bis （4-maleimidophenyl） methane （ BDM ）, bis （ 3-ethyl-4-maleimidophenyl） methane （BEDM） was obtained via a four-step reaction, which was based on the material of oethylnitrylbenzene. Chemical structure of the BEDM was confirmed by FTIR and 1^ H NMR spectra. Acid value of the BEDM sample was 1.74 mg（KOH）/g. Melting point of the BEDM was determined to be 203 ℃ -204℃ with a Gallenkamp hot-block melting point apparatus, and 212℃ by DSC, which is higher than that of the BDM. Solubility of the BEDM is much better than that of the BDM. The BEDM dissolves in some solvents with lower boiling point, such as acetone, chloroform and ethane, etc. Furthermore, nonisothermal curing kinetics of the BEDM resin was investigated to provide information on kinetic parameters, including the curing reaction order （n）, activation energy （E）, frequency factor （A） and rate constant （k） at different heating rates. Value of the curing reaction order was calculated to be 0.94. The activation energy of the BEDM is higher than that for the BDM resin, which might be related to the sterie hindrance induced by the ethyl groups in the BEDM molecular structure. Above works laid the foundation for further study and application of the BEDM resin.
出处
《广州大学学报（自然科学版）》
CAS
2008年第4期50-54,共5页
Journal of Guangzhou University:Natural Science Edition
基金
广州市科技攻关计划--科技攻关引导项目(06A1201012)
