Influence of pressure on the radical polymerization of styrene in solution Communication 2. Polymerization in para-butyraldehyde, butyraldehyde, and their mixtures

Autor:	V. M. Zhulin, V. N. Zagorbinina, M. G. Gonikberg
Rok vydání:	1966
Předmět:	chemistry.chemical_compound Chain propagation Polymerization chemistry Radical polymerization Physical chemistry Chain transfer General Chemistry Degree of polymerization Chain termination Butyraldehyde Photochemistry Styrene
Zdroj:	Bulletin of the Academy of Sciences, USSR Division of Chemical Science. 15:953-956
ISSN:	1573-9171 0568-5230
Popis:	1. The radical polymerization of styrene in para-butyraldehyde, included by azoisobutyrodinitrile, was investigated at 50°. The rate and average degree of polymerization increase substantially when the pressure is raised to 4000 kg/cm2. On the basis of the data on the influence of pressure on the rate and average degree of polymerization, it was concluded that the rate constants of initiation and chain termination decrease with increasing pressure. The values of the volume effects of activation in initiation and chain termination were estimated. 2. The dependence of the change in the average degree of polymerization on the molar ratio butyraldehyde: styrene was investigated at pressures up to 4000 kg/cm2. The data obtained confirm our earlier conclusion of a substantial decrease in the ratio of the rate constants of chain transfer through butyraldehyde and chain propagation in the polymerization of styrene at increased pressure.
Databáze:	OpenAIRE
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