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Thermal decomposition of 2,2'-azobis [2-methyl-omega-hydroxy-oligo(oxyethylene) propionate] in the acrylonitrile/N, N-dimethyl-formamide system

机译:2,2'-偶氮双[2-甲基-ω-羟基-低聚(氧乙烯)丙酸酯]在丙烯腈/ N,N-二甲基-甲酰胺体系中的热分解

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摘要

The thermal decomposition (333 K) of initiator 2,2'-azobis [2-methyl-omega-hydroxyoligo(oxyethylene) propionate] [AIB-OOE(400)] in N,N-dimethylformamide (DMF), in acrylonitrile (AN) and in the mixture DMF/AN with the composition xAN = 0.52 and 0.87 (xAN - the mole fraction of acrylonitrile) was studied by volumetric method. A priority of the experimental determination of the order of decomposition reaction in relation to the initiator was established. It has been found, that the differential kinetic equations (7) and (9) can be used for this purpose. After the determination of the order equal to 1 for all solutios, the kinetic constant k_d~((I)) was determined from the integral equation (15). The differential equations (8) and (10) cannot be used for this purpose (k_d~I not = k_d~(II)). The method used allows to avoid diversities of meaning, occurring in the literature, in determination of the reaction order and thermal decomposition rate constant for the azo-initiators.
机译:引发剂2,2'-偶氮双[2-甲基-ω-羟基低聚(氧乙烯)丙酸酯] [AIB-OOE(400)]在N,N-二甲基甲酰胺(DMF)中在丙烯腈(AN)中的热分解(333 K) ),并通过体积法研究了xAN = 0.52和0.87(xAN-丙烯腈的摩尔分数)组成的DMF / AN混合物。建立了相对于引发剂的实验确定分解反应顺序的优先级。已经发现,微分动力学方程式(7)和(9)可用于该目的。在确定所有溶液的阶数等于1之后,根据积分方程(15)确定动力学常数k_d〜((I))。微分方程(8)和(10)不能用于此目的(k_d〜I not = k_d〜(II))。在确定偶氮引发剂的反应顺序和热分解速率常数时,所使用的方法可以避免文献中出现的含义的多样性。

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