Styrene → Benzene, ethenyl-, polymer with 1,3-butadiene

Participants

Reaction Steps

A six armed asymmetrical styrene-butadiene blockcopolymer P4 was prepared as in example 1, except that 72 g styrene were added to 6 l cyclohexane at 50° C., after which 7.25 mol sec-butyllithium were added. After the polymerization was completed, 362 g butadiene were dosed to the same reactor. The polymerization continued until completion. Hereafter 1.81 mmol of the coupling reagent BTCSE was added. INT4 was sampled at this stage. The reaction sequence was followed by adding 65 g of butadiene to the reaction and 3.62 mol sec-butyllithium.

Provenance & Evidence