Abstract: The self -emulsified waterborne nitrocellulose(WNC )was synthesized with nitrocellulose(NC)for coating, isophorone diisocyanate(IPDI)trimer and dimethylol propionic acid( DMPA). The structure of WNC was characterized by FT-IR. The thermal decomposition of WNC was analyzed by TG. And the activation energy and pre-exponential factor were by using Kissinger and Ozawa method. 9 types of commonly used kinetic functions calculated were proposed to define the most probable thermal decomposition kinetic function. The results showed that the obtained average activation energy and per-exponential of the thermal decomposition were 221. 31 KJ/mol and 1.108 2 X10²⁴ s^-1. The solid-state decomposition process follows a random nucleation mechanism in sigmoidal model.

Key words: waterborne nitrocellulose, non-isothermal TGA, TGA/DTG, thermal decomposition kinetics

摘要： 以硝化纤维（NC）、异佛尔酮二异氰酸酯（ IPDI）三聚体、二羟甲基丙酸（DMPA）为原料，通过自乳化方法合成了水性硝化纤维（WNC）。 通过傅里叶变换红外光谱（FT-IR）对目标产物的结构进行表征；采用热重法（TG）研究了 WNC 薄膜中硝化纤维基体的热分解行为；并分别采用 Kissinger法、Ozawa 法求解出热分解反应的活化能和频率因子等动力学常数，结合 9 种常用的动力学函数来判断 WNC 中硝化纤维基体的热分解机理函数。 结果表明：水性硝化纤维基体的热稳定性明显提高，平均热分解活化能为 221.31kJ/mol、频率因子为1.1082 × 10²⁴ s^-1，热分解反应遵从 Sigmodal 类型中的随机核化机理。

关键词: 水性硝化纤维, 非等温热重法, TGA/DTG, 热分解动力学