F. Schue et al., SYNTHESIS OF STAR-BRANCHED OLIGOMERS BY REACTION OF OLIGOBUTADIENYLLITHIUM WITH DIESTERS AND EPOXIDIZED SOYBEAN OIL, Macromolecular symposia, 85, 1994, pp. 365-377
Anionic polymerization can produce branches with low molecular weight
and narrow molecular weight distributions. Post polymerization linking
involving the still active chain ends can then be done to produce bra
nched oligomers with a predetermined number of arms. These species are
then excellent model compounds for testing high molecular weight bran
ches. Here we chose the reaction of oligobutadienyllithium with ethyl
acetate, dimethyl adipate, diethyl adipate, dimethyl phthalate and epo
xidized soyabean oil. For the last linking agent, we compared the resu
lt obtained with a high molecular weight poly(styryl-b-butadienyl)lith
ium.