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制备了N-[(4-溴-3,5-二氟)苯基]马来酰亚胺/苯乙烯/马来酸酐(BDPM/St/MA)三元共聚物,通过傅里叶红外光谱对其结构进行了确认。利用热分析考察了原料配比、热分解气氛和热解时间对聚合物热性能的影响,并研究了三元共聚物的热分解动力学。结果表明,随着共聚原料中BDPM物质的量的增加,三元聚合物的热稳定性逐渐提高,且BDPM/St/MA在氮气中的热稳定性较空气中更好。Flynn-Wall-Ozawa法获得BDPM/St/MA的热分解表观活化能为139.69 k J/mol,显示该聚合物热稳定性能优良。
A ternary copolymer of N - [(4-bromo-3,5-difluoro) phenyl] maleimide / styrene / maleic anhydride (BDPM / St / MA) was prepared and characterized by Fourier transform infrared spectroscopy The structure was confirmed. Thermal analysis was used to investigate the effect of raw material ratio, pyrolytic atmosphere and pyrolysis time on the thermal properties of the polymers. The thermal decomposition kinetics of the terpolymers was also investigated. The results show that the thermal stability of the terpolymer increases with the increase of the amount of BDPM in the copolymerization feedstock, and the thermal stability of BDPM / St / MA in nitrogen is better than that in air. The thermal decomposition apparent activation energy of BDPM / St / MA obtained by Flynn-Wall-Ozawa method is 139.69 kJ / mol, which shows that the thermal stability of this polymer is excellent.