Poly(methacryloyloxyethyl trimethyl ammonium chloride-co-acrylamide) (P(DMC-AM)), is widely used for various applications under a wide range of conditions. In this work the thermal stabilities and decomposition kinetics of P(DMC-AM) with various intrinsic viscosities, synthesized in our laboratory, were studied by thermogravimetric analysis (TGA) at various heating rates, 5, 10, 20 and 40 K/min, and differential scanning calorimetry (DSC) at 10 K/min, all under a dynamic nitrogen atmosphere. The kinetic parameters were calculated using a model fitting method (Coats–Redfern, CR) and two model–free methods (Kissinger–Akahira–Sunose, KAS and Flynn–Wall-Ozawa, FWO). The result showed that all samples exhibited three steps of mass loss, one for the elimination of the adsorbed water and organic solvents and two for the thermal decomposition of P(DMC-AM). The first decomposition stage for the three samples was in the range of 5% to 45%, the second decomposition stage in the range of 65% to 95% and with 55% conversion separating the first and second decomposition stages. The E values increased with the increasing intrinsic viscosity of the samples. Hence, P(DMC-AM) had good thermal stability and the higher the molecular weight, the better the thermal stability was.

聚（甲基丙烯酰氧基乙基三甲基氯化铵-共-丙烯酰胺）（P（DMC-AM））在各种条件下广泛用于各种应用。在这项工作中，我们通过热重分析（TGA）以5、10、20和40 K / min的升温速率研究了在我们实验室中合成的具有各种固有粘度的P（DMC-AM）的热稳定性和分解动力学，和差示扫描量热法（DSC）均在动态氮气气氛下以10 K / min的速度进行。使用模型拟合方法（Coats–Redfern，CR）和两种无模型方法（Kissinger–Akahira–Sunose，KAS和Flynn–Wall-Ozawa，FWO）计算动力学参数。结果表明，所有样品均表现出三步质量损失，一步为吸附水和有机溶剂的消除，二步为P（DMC-AM）的热分解。三个样品的第一分解阶段在5％至45％的范围内，第二分解阶段在65％至95％的范围内，其中55％的转化率将第一分解阶段和第二分解阶段分开。这E值随着样品的特性粘度的增加而增加。因此，P（DMC-AM）具有良好的热稳定性，并且分子量越高，热稳定性越好。