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

HRID 1603164Notes

Reaction equation

HRID 1603164 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.C=CC=C>O1CCCC1>[CH2:1]=[CH:2][CH:3]=[CH2:4].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

4

Reactant 2

HCID 7501StyreneHCID 78451,3-Butadiene

Product 1

HCID 62697Benzene, ethenyl-, polymer with 1,3-butadiene

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

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%.

Sources & evidence

ORD record
ord-39fa4f1a315e4cc68f3055bc47f7362f
Source dataset
uspto-grants-1999_11
Patent number
US05985995

Reaction notes

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