Ni. Pakuro et al., CHAIN-BREAKING REACTIONS IN THE COURSE OF ISOPRENE POLYMERIZATION WITH ORGANOSODIUM INITIATORS, Vysokomolekularnye soedinenia. Seria A, 36(1), 1994, pp. 136-139
Molar mass characteristics of polymers obtained in various solvents by
anionic polymerization of isoprene initiated with an hydrocarbon-solu
ble organosdium initiator that does not contain polar substances are s
tudied. Chain transfer to solvent is found for polymerization in tolue
ne and xylene. Number-average molar masses of the polymers obtained in
heptane and benzene are shown to increase linearly with increasing co
nversion and to correspond to those characteristic of the living chain
s. Evidence of chain transfer to polymer is also obtained. The effect
of polar additives on the process under study is discussed.