Ethyl benzoate → Styrene-butadiene-styrene

HRID 1169004Notes

Reaction equation

HRID 1169004 reaction equation
[CH2:1]=[CH:2][CH:3]=[CH2:4].[CH2:5]=[CH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[Li]CCCC.C(OC(=O)C1C=CC=CC=1)C>>[CH2:5]=[CH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[CH2:1]=[CH:2][CH:3]=[CH2:4].[CH2:5]=[CH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1

Participants

5

Reactant 4

HCID 7165Ethyl benzoateHCID 7501Styrene2×HCID 78451,3-Butadiene2×HCID 178418339Butyllithium

Product 1

HCID 22280236Styrene-butadiene-styrene

Procedure

In this experiment 1000 grams of premix (1,3-butadiene monomer or styrene monomer) was added to a one-gallon (3.79 liter) batch reactor using BaDEGEE/TOA/nBuLi with molar ratios of 1/4/3. The polymerization was carried out until complete conversion was attained. An additional 1000 grams of premix (styrene or 1,3-butadiene) was added to the reactor and the polymerization was continued until completion. The polymer was then coupled with ethylbenzoate. Hence an styrene-butadiene-styrene triblock polymer was produced. The table below depicts the polymer characterization data.

Workup

  1. additionwas added to the reactor

Sources & evidence

ORD record
ord-bb13475e94074254b0f297bdd9705bbe
Source dataset
uspto-grants-2003_09
Patent number
US06627715B2

Reaction notes

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