The thermal decomposition behavior of polyacrylamide poly (methacryloyloxyethyl trimethylammonium chloride-acrylamide) (P(DMC-AM)) was studied by means of TG and DSC under nitrogen atmosphere at temperature range of 323.15–823.15 K. The effect of cationicity on thermal stability was discussed. The TG/DSC curves indicated that the decomposition process of P(DMC-AM) included three steps, and an increase in cationicity resulted in a slightly increased decomposition temperature and decomposition enthalpy, indicating a higher thermostability for P(DMC-AM). Furthermore, the evolved gases during the degradation were analyzed simultaneously via TG coupled with FTIR and MS. The possible thermal composition mechanism was proposed and validated by calculating the bond orders. The results from this study might supply useful message for expanding innovative application.

利用TG和DSC在氮气气氛中323.15–823.15 K的温度范围内，通过TG和DSC研究了聚丙烯酰胺-聚（甲基丙烯酰氧基乙基三甲基氯化铵-丙烯酰胺）（P（DMC-AM））的热分解行为。阳离子对热稳定性的影响为讨论过。TG / DSC曲线表明P（DMC-AM）的分解过程包括三个步骤，阳离子度的增加导致分解温度和分解焓略有增加，表明P（DMC-AM）的热稳定性更高。此外，通过TG，FTIR和MS结合同时分析了降解过程中产生的气体。提出了可能的热组成机理，并通过计算键序进行了验证。