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本文以在位红外光谱数据处理了丙烯腈共聚物热解动力学,提出了稳定化丙烯腈(AN)/二丙酮丙烯酰胺(DAA)/丙烯酸甲酯(MA)三元共聚物中各反应基团的速度表达式。通过氧吸附在共聚物薄膜上发生的化学反应实验数据进行验证,结果与推导式相符。由此求出共聚物分子中的有关反应速度常数,将反应速度常数的对数值与1/T 作图,符合阿累尼乌斯规律,得各基团的反应活化能为:△E_(>CH_2)=6.537千卡/克分子,△E_(-C≡N)=3.432千卡/克分子,△E_(>C=N-)=3.435千卡/克分子和△E_(-CH_3、>CH_2)=9.152千卡/克分子。同时,还讨论了各反应基团在不同温度条件下的热解行为与热处理时间的关系。
In this paper, the kinetics of pyrolysis of acrylonitrile copolymer was studied by in-situ infrared spectroscopy data. The reaction of each reactive group in stabilized acrylonitrile (AN) / diacetone acrylamide (DAA) / methyl acrylate (MA) terpolymer Mission Expressions. The experimental data of chemical reaction happened on the copolymer film by oxygen adsorption were validated and the results were consistent with the deduced results. From this, we get the related reaction rate constant in the copolymer molecule. The logarithm of the reaction rate constant is plotted against 1 / T, which is in accordance with the Arrhenius law. The reaction activation energies of each group are: CH 2) = 6.537 kcal / mol, ΔE - (- C≡N) = 3.432 kcal / mol, △ E _ (> C = N -) = 3.435 kcal / mol and △ E_ (- CH_3, CH 2) = 9.152 kcal / mol. At the same time, the relationship between pyrolysis behavior and heat treatment time of each reactive group at different temperatures was also discussed.