Addition of two molecules of sec‐butyllithium to one molecule of m‐diisopropenylbenzene produces a bifunctional initiator which is soluble in non‐polar solvents. This initiator is quite efficient for the polymerization of isoprene and butadiene and allows the preparation of samples of particular interest: bifunctional polydienes with high 1,4‐cis and 1,4 contents, respectively, and by using a cross‐linking agent elastomeric gels even after removal of the solvent.
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Beinert et al. (1978) studied this question.
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