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

HRID 2188050Notes

Reaction equation

HRID 2188050 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.C=CC=C.C([Li])CCC.C(Cl)(C)(C)C>O1CCCC1.C1CCCCC1>[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

7

Reactant 4

HCID 7501StyreneHCID 78451,3-ButadieneHCID 10486tert-BUTYL CHLORIDEHCID 178418339Butyllithium

Product 1

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

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8078CyclohexaneSolvent

Procedure

5000 g of cyclohexane was placed in a 10 l autoclave reactor, followed by the addition of 100 g of tetrahydrofuran, 130 g of styrene monomer, 870 g of butadiene monomer and 10 mmol of n-butyl lithium for one-hour polymerization. Then, 0.9 g of t-butyl chloride was added to the mixing solution to deactivate the terminal of polymer. Thus, a styrene-butadiene random copolymer, so obtained, had the following characteristics: 13% as a combined content of styrene, 57% as a combined 1,2 vinyl content of butadiene unit, and a number average molecular weight of about 100,000.

Workup

  1. custompolymerization

Sources & evidence

ORD record
ord-fcb986a5b15242518625b8a11e54fa35
Source dataset
uspto-grants-2002_06
Patent number
US06410657B1

Reaction notes

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