Polymerization of styrene in the presence of benzoyl peroxide and di‐n‐alkylaniline. Vinyl polymerization. XLIX.

Abstract

AbstractThe polymerization of styrene was carried out in benzene at 30°C. As initiator, a system of benzoyl peroxide – di‐n‐alkylaniline was applied. It was found that the initial rate of polymerization was proportional to the square root of the initial concentrations of both benzoyl peroxide and di‐n‐alkylaniline. The decomposition of benzoyl peroxide with di‐n‐alkylaniline was also carried out in the presence of styrene and it was found that the initial rate of decomposition was proportional to the initial concentrations of benzoyl peroxide and di‐n‐alkylaniline. The plots of the initial rate constant of the polymerization of styrene and that of decomposition of the benzoyl peroxide vs. the number of carbons of the alkyl group of di‐n‐alkylaniline showed a similar trend as those obtained in the previous paper. From the relationship between the initial rates of polymerization of styrene and that of the decomposition of benzoyl peroxide, the values of the initiator efficiency were computed.