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以优选质量配比约为10∶1的双马来酰亚胺(BMI)前驱液与苯乙烯为原料,在超声波细胞粉碎机中均匀共混,采用束流为8.5mA的电子束引发反应,完成了BMI前驱液中聚酰胺酸的酰亚胺化,合成了苯乙烯-双马来酰亚胺共聚物。电子束辐照法具有均匀、高效和无需引发剂的显著优点。傅立叶变换红外(FT-IR)谱图分析结果表明,电子束辐照实现了酰亚胺结构的产生,并引发了BMI与苯乙烯中CC双键的自由基共聚。热分析结果表明,所制得的共聚物具有良好的热稳定性,热分解峰值温度高达452.18℃。
The precursor solution of bismaleimide (BMI) and styrene with a preferable mass ratio of about 10: 1 were uniformly blended in an ultrasonic cell crusher and subjected to electron beam initiation reaction at a beam current of 8.5 mA, The imidization of polyamic acid in BMI precursor solution was completed and a styrene-bismaleimide copolymer was synthesized. Electron beam irradiation has the significant advantage of being uniform, efficient, and initiator-free. Fourier transform infrared (FT-IR) spectroscopy analysis results show that the electron beam irradiation to achieve the imide structure, and lead to BMI and styrene CC double bond free radical copolymerization. Thermal analysis results show that the prepared copolymer has good thermal stability, thermal decomposition peak temperature up to 452.18 ℃.