Język Polski
English
Published
: 2022-09-19
The solvation effect in the thermal decomposition of 2,2'-azoisobutyronitrile in acrylonitrile/methyl methacrylate mixtures in diluted solutions of N,N-dimethylformamide
Abstract
The thermal decomposition rate constant (kd) of 2,2'-azoisobu-tyronitrile (AIBN) was studied in acrylonitrile (AN)-methyl methacrylate (MMA) comonomer mixtures dissolved in dilute solutions of N,N-dimethyl-formamide (DMF) as a function of the comonomer mixture composition and concentration in the solvent at 60°C. The relationships kd = i(xA, C) (xA - mole fraction of acrylonitrile in comonomer mixture, C - comonomer mixture concentration) produce convex curves in relation to the straight linę drawn through the kd values obtained at the boundary conditions (xA = 0, xA = 1). The radius of curvature is related to concentration C, which was fixed at 0.1, 0.5, 1.0 and 3.0 mol o dm~3. The higher the dilution of the monomer mixfure, me smal/er the convexify of the kd = f(xA) curve. Ali the experimentaJ courses of kd = f(xA) may be interpreted in terms of soJvation of the initiator by monomer A (AN), monomer B (MMA) and solvent S (DMF). The soJvation forms occurring in the system AN-MMA/DMF/AIBN/60°C, their relative stability constants and relative contents, and the thermal decomposition rate constants of the solvated forms were determined (Tables 2-5).
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Zasady cytowania
Szafko, J., & Pabin-Szafko, B. (2022). The solvation effect in the thermal decomposition of 2,2’-azoisobutyronitrile in acrylonitrile/methyl methacrylate mixtures in diluted solutions of N,N-dimethylformamide. Polimery, 46(2), 125–131. Retrieved from https://ichp.vot.pl/index.php/p/article/view/2058
