The bulk copolymerization of methacrylonitrile with methyl, ethyl and butyl methacrylates, initiated by AIBN under high vacuum, was studied dilatometrically at 60°C. The composition of the reaction medium sensitively affects the overall rate of copolymerization in such a way that a decrease in the copolymerization rate with increasing concentration of methacrylonitrile in the feed was observed. The reactivity ratios of the three systems were calculated according to the general copolymerization equation, from composition data of copolymer samples determined by lH n.m.r. spectroscopy. The values obtained indicate that the methacrylonitrile/methyl methacrylate system approaches ideal behaviour and the other two systems seem to fit a typical random copolymerization
Посилання на статтю:
Bulk copolymerization of methacrylonitrile with n-alkyl methacrylates: rate of copolymerization and reactivity ratios / B. Vbzquez, J. Areizaga, M. Valero and the late G. Martin Guzmiin // Polymer. – 1992. – Vol 33. – P. 1999-2002.