title: Effect of ultrasound in the free radical polymerization of acrylonitrile under a new multi-site phase-transfer catalyst - a kinetic study.
abstract: The kinetics of polymerization of acrylonitrile (AN) was carried out under heterogeneous condition using a new multi-site phase-transfer catalyst (MPTC), viz., N,N'-dihexyl-4,4'-bipyridinium dibromide in the presence of water soluble initiator, potassium peroxydisulphate (PDS) under chlorobenzene/water two phase system assisted by ultrasound irradiation at constant temperature 60+1°C under nitrogen atmosphere. The rate of polymerization increases with an increasing the concentrations of AN, MPTC and PDS. The order with respect to [AN], [MPTC], and [PDS] were found to be 1.01, 1.03 and 0.52, respectively. Based on the observed results a suitable mechanism has been proposed to account for the experimental observations followed by a discussion on its significance.
authors.affiliation: Sri Chandrashekarendra Saraswathi Viswa Mahavidyalaya University, Enathur, Kanchipuram, Tamil Nadu 631 561, India. Electronic address: selvarajptc@gmail.com.
authors.forename: Varathan
authors.initials: V
authors.lastname: Selvaraj
authors.affiliation: Sri Chandrashekarendra Saraswathi Viswa Mahavidyalaya University, Enathur, Kanchipuram, Tamil Nadu 631 561, India. Electronic address: srisakthi84@sifymail.com.
authors.forename: Perumal
authors.initials: P
authors.lastname: Sakthivel
authors.affiliation: Head of The Department of Chemistry, Pachaiyappa's College for Men, Kanchipuram, Tamil Nadu 631 501, India. Electronic address: rajendranv1967@gmail.com.
authors.forename: Venugopal
authors.initials: V
authors.lastname: Rajendran
keywords: Acrylonitrile; Multi-site phase-transfer catalysis; N,N′-dihexyl-4,4′-bipyridinium dibromide; Ultrasound irradiation