Kinetics of Radical Copolymerization. XV. Absolute Rate Constants in the Copolymerization System Styrene-Ethyl Acrylate-Benzene

Autor:	T. Földes-Berezsnich, F. Tüdös, I. Gyöngyhalmi, A. Nagy
Rok vydání:	1996
Předmět:	Steric effects Polymers and Plastics Thermodynamics General Chemistry Rate equation Photochemistry Styrene chemistry.chemical_compound Reaction rate constant chemistry Elementary reaction Materials Chemistry Ceramics and Composites Copolymer Ethyl acrylate Benzene
Zdroj:	Journal of Macromolecular Science, Part A. 33:1723-1734
ISSN:	1520-5738 1060-1325
DOI:	10.1080/10601329608010936
Popis:	With the use of rate data of the system St-EA-AIBN-Bz-50°C measured earlier, the parameters of the rate equation derived in terms of the hot radical theory were determined. The reason for the reevaluation of experimental data was that the absolute values of propagation and termination rate constants could be determined in the homopolymerization of both monomers with the improved rotating sector method elaborated for nonsteady-state kinetic investigations. This enabled us to determine the rate constants of the elementary reactions and deactivation parameters (γ12 and γ21) of the copolymerization. The rate data calculated with the new parameter set are in good agreement with the measured ones, proving the applicability of the hot radical theory. The results are represented by a steric coordination system in order to call attention to the importance of the simultaneous study of composition-and dilution-dependence in copolymerization.
Databáze:	OpenAIRE
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