V. L. Rao, G. N. Babu
1989
Citations
0
Influential Citations
28
Citations
Journal
European Polymer Journal
Abstract
Abstract γ-Methacryloxypropyl trimethoxy silane (MPTMS) was copolymerized with methyl methacrylate (MMA) and with styrene (STY) in toluene and with acrylonitrile (AN) in bulk at 65 ± 0.1°C using benzoyl peroxide as initiator. The compositions of the copolymers were determined from silicon contents estimated gravimetrically; the reactivity ratios were determined by the Kelen Tudos graphical method. For copolymerization of STY(M 1 ) with MPTMS(M 2 ), the reactivity ratios are r 1 = 0.45 ± 0.04 and r 2 = 0.9 ± 0.01; for AN(M 1 ) with MPTMS(M 2 ) they are r 1 = 0.11 ± 0.03 and r 2 = 3.7 ± 0.02; for MMA(M 1 ) with MPTMS(M 2 ) they are r 1 = 0.74 ± 0.06 and r 2 = 1.33 ± 0.02. In all cases, r 2 is greater than r 1 indicating that copolymers have blocks of MPTMS units interrupted by one or more organic comonomer units such as AN, STY or MMA. A comparison of relative reactivities of MPTMS, [(2-methacryloyloxy)propoxy] trimethyl silane, [(2-methacryloyloxy)propoxy] dimethylphenyl silane, [(2-methacryloyloxy)propoxy] diphenylmethyl silane and [(2-methacryloyloxy)ethoxy] trimethyl silane has been made. The influence of silicon comonomer on the properties of copolymers, such as solubility and thermal behaviour, was also studied.