甲基丙烯酸甲酯-马来酸酐共聚物的合成及热性能

Thermal Degradation Behavior of Methyl Methacrylate-Maleic Anhydride Copolymer

通过溶液聚合法,在不同的反应温度、不同马来酸酐投料质量百分比的条件下,合成了甲基丙烯酸甲酯-马来酸酐共聚物P(MMA-co-MAH)。通过傅立叶红外光谱以及滴定法对合成的P(MMA-co-MAH)共聚物进行表征,结果表明,在实验条件下甲基丙烯酸甲酯(MMA)与马来酸酐(MAH)均能发生共聚合反应。提高共聚合反应温度以及马来酸酐的投料比都能够显著提高P(MMA-co-MAH)共聚物中的马来酸酐含量。通过对P(MMA-co-MAH)共聚物的热失重分析,利用Ozawa及Kissinger方程研究了共聚物的降解动力学,结果表明,P(MMA-co-MAH)共聚物的热稳定性受聚合反应温度和马来酸酐投料比的共同影响,共聚物中马来酸酐含量对P(MMA-co-MAH)共聚物的热稳定性起决定性作用。

Poly（methyl methacrylate-co-maleic anhydride） copolymer was synthesized by solution polymerization.The influence of reaction temerature and maleic anhydride（MAH） ingredient on the copolymer was investigated.The copolymer was characterized by Fourier transfrums infrared spectroscopy（FT-IR）.It is found that maleic anhydride is copolymerized with methyl methacrylate in the copolymer.The higher reaction temperature,the larger percent of maleic anhydride in（MMA-MAH） copolymer.The more maleic anhydride in the comonomer,the more maleic anhydride in the copolymer.The thermal weight loss behavior and activation energy results were calculated by the Ozawa and Kissinger equation.It shows that the copolymerization reaction temperature and the content of maleic anhydride in comonomer affect the thermal stability of（MMA-MAH） copolymer.And the thermal stability of（MMA-MAH） copolymer is affected mainly by the content of maleic anhydride in copolymer.