A new efficient monofunctional initiator transfer (minifer) system, comprising 2-cyclohexyl-2-propanol, BC13 and 1-methyl-2-pyrrolidinone, has been investigated for the first time in CH2CI 2 diluent at -40°C for the living polymerization of isobutylene. The use of this new minifer system has led to the synthesis of low molecular weight, living (near-monodisperse), new ~t-cyclohexyl-og(tert-chloro)polyisobutylenes. The structural analysis of these polymers by 13C n.m.r, spectroscopy confirmed the nature of the head and end groups to be a cyclohexyl and a tert-chloro, respectively. The living nature of these polymers has been demonstrated by kinetic investigations as well as by their low polydispersity (Mw/M, = 1.18-1.43 ) values from g.p.c, studies
Посилання на статтю:
A new initiating (minifer) system leading to the synthesis of living telechelic ~-cyclohexyl-~ (tert-chloro) polyisobutylenes* / G. Pratap, J. Wang and J. P. Heller // Polymer. – 1992. – Vol 33. – P. 443-446.