Novel isocoumarin-derived copolymer systems of 2-(isocoumarin-3-yl)-2-oxoethyl methacrylate (ICEMA) with methyl methacrylate (MMA) were prepared by free radical polymerization. The ICEMA monomer ratios at the copolymer compositions were found to be 25%, 48% and 64% ICEMA by integration method in ¹H-NMR technique. Thermal decomposition studies of copolymer systems were performed by thermogravimetric analysis. Various kinetic methods were applied to determine thermal decomposition kinetics of poly(ICEMA:0.48-co-MMA) copolymer. The maximum rate loss temperatures of this copolymer shifted from 295.38 to 323.17 °C depending on the increasing heating rate from 5 to 20 °C/min. The thermal decomposition activation energies of copolymer were investigated in the conversion range of 7–19%, which were resulted to be 126.17 and 125.32 kJ/mol by Flynn–Wall–Ozawa and Kissinger’s methods, respectively. In addition, thermal decomposition process of the studied copolymer followed with a D₁ solid-state mechanism, one-dimensional diffusion-type deceleration mechanism, at the optimum heating rate of 5 °C/min.

中文翻译：

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甲基丙烯酸2-（异香豆素-3-基）-2-氧代乙基酯与甲基丙烯酸甲酯的共聚物体系的制备及热分解动力学

通过自由基聚合反应制备了甲基丙烯酸2-（异香豆素-3-基）-2-氧代乙基酯与甲基丙烯酸甲酯（MMA）的新型异香豆素衍生的共聚物体系。通过积分法在¹中发现共聚物组合物处的ICEMA单体比率为25％，48％和64％ICEMA。1 H-NMR技术。通过热重分析进行共聚物体系的热分解研究。应用各种动力学方法确定聚（ICEMA：0.48-co-MMA）共聚物的热分解动力学。该共聚物的最大速率损失温度从295.38℃变化到323.17°C，这取决于从5到20°C / min的升温速率。在Flynn-Wall-Ozawa和Kissinger的方法下，研究了共聚物在7-19％的转化率范围内的热分解活化能，分别为126.17和125.32 kJ / mol。另外，在5℃/ min的最佳加热速率下，所研究的共聚物的热分解过程遵循D ₁固态机理，一维扩散型减速机理。