K. Hatada, H. Nakanishi, K. Ute
Aug 1, 1986
Citations
0
Influential Citations
46
Citations
Journal
Polymer Journal
Abstract
Abstractp- and m-Vinylbenzylmagnesium chlorides (VBzMgCl) were prepared in diethyl ether from the corresponding chloromethylstyrenes, and used as initiators in the polymerizations of MMA and styrene. PMMAs with a variety of tacticities were obtained in toluene and THF by these initiators, and highly syndiotactic (S>96%) PMMA of low polydispersity (Mw/Mn=1.19) could be prepared with m-VBzMgCl in THF at −110°C. It was found by the totally deuterated monomer technique that the polymer molecule thus obtained had one vinylbenzyl group at the beginning of the chain (α-end). The PMMAs could be used as macromers, which were polymerized and copolymerized with styrene by a radical initiator. p-VBzMgCl polymerized styrene in THF at 0°C, and the resulting polystyrene can also be used as a macromer. m-VBzMgCl and benzylmagnesium chloride did not give polystyrene. Spontaneous polymerizations of VBzMgCls to poly(Grignard reagent)s were also studied.