含能材料2025，Vol.33Issue(3)：277-283,7.DOI:10.11943/CJEM2024157
PNIMMO的初始热老化行为的等温量气法研究
Initial Thermal Aging Behavior of PNIMMO Studied by Isothermal Gasometric Method
摘要
Abstract
The initial isothermal aging behavior of poly(3-nitratomethyl-3-methyloxetane)(PNIMMO)was studied.The aging ki-netic parameters and thermal aging mechanism of PNIMMO at 100-120℃were investigated using an isothermal gas measuring device.The storage life of PNIMMO was determined by the Berthelot equation.The results indicate that the activation energy(Ea)is 156.42 kJ·mol-1 and the logarithm of the pre-exponential factor(lg A)is 16.86 s-1 when the aging depth of PNIMMO reaches 0.1%.Conversely,at an aging depth of 0.5%,Ea is measured at 156.05 kJ·mol-1 and lg A at 16.03 s-1,as derived from the Arrhenius equation.According to the mode matching method,the thermal aging of PNIMMO at 100-120℃conforms to the mechanism function No.28,that is,the reaction order n=1/4,Ea=154.33 kJ·mol-1.Using an aging depth of 0.1%as the evalua-tion criterion,PNIMMO can be stored at room temperature for 51.6 years.During the initial phase of thermal decomposition,the side chain—O—NO2 bond undergoes cleavage followed by hydrogenation,subsequently leading to gradual degradation of the main chain into stable polyaromatic compounds.关键词
聚3-硝酸酯甲基-3-甲基氧杂环丁烷/等温热老化/动力学/贮存寿命Key words
poly(3-nitrilomethyl-3-methyloxetane)/isothermal thermal aging/kinetics/storage life分类
武器工业引用本文复制引用
龚雪玲,关健,刘红妮,莫洪昌,张庆元,彭汝芳,金波..PNIMMO的初始热老化行为的等温量气法研究[J].含能材料,2025,33(3):277-283,7.基金项目
国家自然科学基金(22305197)、西南科技大学研究生创新基金(24ycx1070) National Natural Science Foundation of China(No.22305197),Postgraduate Innovation Fund Project by South-west University of Science and Technology(24ycx1070) （22305197）
