Abstract
Polymerization of methylmethacrylate was studied using benzoyl peroxide and cetyl benzyl dimethyl ammonium chloride (CBDAC) combination as the redox initiator at 40°. Equilibrium complexation between the redox components precedes the radical generation process, and the complex acts as the actual initiating species. Initiator exponent was 0.5 under various conditions of homogeneous polymerization. Kinetics of polymerization in diluted systems were variable in respect of order with respect to monomer depending on the nature of the solvent or additive. DMF, acetonitrile and pyridine produced rate enhancing effects through actively influencing the initiation step; cyclohexanone, acetone, chloroform, methanol and benzene behaved as (normal) inert diluents, while formamide and acetamide produced retardation. Termination of polymerization occurred exclusively bimolecularly. As a redox component, the quaternary chloride salt, CBDAC behaved somewhat differently from quaternary bromide salts cetyl trimethyl ammonium bromide and cetyl pyridinium bromide.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
