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

Participants

Reaction Steps

A six armed asymmetrical styrene-butadiene blockcopolymer P6 was prepared as in example 1, except that 143 g styrene were added to 6 l cyclohexane at 50° C., after which 4.76mmol sec-butyllithium were added. After the polymerization was completed, 238 g butadiene were dosed to the same reactor. The polymerization continued until completion. Hereafter 1.19 mmol of the coupling reagent BTCSE were added. INT6 was sampled at this stage. The reaction sequence was followed by adding 50 g of butadiene to the reaction and 2.38 mmol sec-butyllithium. Hereafter, 69 g of butadiene were dosed to the reactor.

Provenance & Evidence