Methanol → Styrene-butadiene-styrene

HRID 280358

Reaction equation

HRID 280358 reaction equation
[CH3:1]O.[C:3]1([CH3:9])[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1>>[CH2:1]=[CH:9][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH2:8]=[CH:3][CH:4]=[CH2:5].[CH2:1]=[CH:9][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

3

Reactant 2

HCID 887MethanolHCID 1140Toluene

Product 1

HCID 22280236Styrene-butadiene-styrene

Procedure

In a 100-ml of toluene was dissolved 5 g of the polymer produced above. The resulting solution was subjected to high speed centrifugation at 10,000 rpm to separate it into a toluene-soluble portion (A) and a toluene-insoluble portion (I). The toluene-insoluble portion was 20.2% of the original polymer. Methanol was added in small portions to the toluene-soluble portion to precipitate part of the polymer of the toluene-soluble portion and thus Sample B was obtained. Then, a large amount of methanol was added to the residue to obtain Sample C. Thus, the toluene-soluble portion of the original polymer was subjected to fractional precipitation to obtain Samples B and C. Incidentally, the styrene-butadiene-styrene block copolymer produced in the first step of polymerization was named "Sample S".

Workup

  1. customproduced above
  2. customto separate it into a toluene-soluble portion (A)
  3. additionMethanol was added in small portions to the toluene-soluble portion
  4. customto precipitate part of the polymer of the toluene-soluble portion
  5. customthus Sample B was obtained
  6. customto obtain Sample C
  7. customThus, the toluene-soluble portion of the original polymer was subjected to fractional precipitation
  8. customto obtain Samples B and C

Sources & evidence

ORD record
ord-1c62778477324394958c98e21bca8dd7
Source dataset
uspto-grants-1986_05
Patent number
US04588782

Linked notes

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