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

Participants

Reaction Steps

In a 2 l reactor, styrene and butadiene was sequentially polymerizated using n-buthyllithium as initiator and tetrahydrofurane as polar modifier to obtain a styrene-butadiene living copolymer, that is made to react with Cl4Si as coupling agent for 5 min, obtaining so a SBS copolymer with a star shape, with four arms. The polymer had 29,7% of styrene, 42,5% of vinyl content in polybutadiene and a Mn=93400. The percentage of coupling was 96,5%.

Provenance & Evidence