H. Minato, M. Oku, N. Higosaki
Feb 1, 1970
Citations
0
Influential Citations
2
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
t-Butylmagnesium chloride was found to initiate the polymerization of vinyl chloride efficiently at −22–30°C. The best solvent was diethyl ether, but the degree of polymerization was the highest when no solvent was used (\barPn=1940 at 20°C). The apparent activation energy for the rate of polymerization was 13.2 kcal/mol and the frequency factor was 9.06×104. The rate of polymerization, Rp, was equal to const. ×[VC]3.90×[t−BuMgCl]1.98. Isopropylmagnesium bromide initiated the polymerization with less efficiency, and phenylmagnesium bromide was completely ineffective. Vinyl chloride and styrene were copolymerized in ether by t-butylmagnesium chloride at 30°C. The mole % styrene included in the copolymer was considerably different from those obtained by benzoyl peroxide at 48°C or by di-t-butylperoxy oxalate at 30°C.