Styrene → Styrene-butadiene-styrene

HRID 376476

Reaktionsgleichung

Reaktionsgleichung von HRID 376476
[CH2:1]1[CH2:6]CC[CH2:3][CH2:2]1.[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C([Li])CCC.C=CC=C>O1CCCC1>[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[CH2:6]=[CH:1][CH:2]=[CH2:3].[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1

Komponenten

6

Edukt 4

HCID 7501Styrene2×HCID 78451,3-ButadieneHCID 8078CyclohexaneHCID 178418339Butyllithium

Produkt 1

HCID 22280236Styrene-butadiene-styrene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

In a 2 gallon autoclave reactor, 4,500 g of cyclohexane was placed. 9 g of tetrahydrofuran, 112.5 g of styrene monomer and 1.3 g of n-butyllithium were charged into the reactor and then the reaction mixture was subjected to polymerization for 1 hour. Thereafter, 525 g of 1,3-butadiene monomer was injected into the reactor to polymerize for one hour. Finally, 112.5 g of styrene monomer was added and then polymerized for one hour to obtain styrene-butadien-styrene living block copolymer with a number average molecular weight of about 100,000 which had a styrene content of 29.9% (block styrene content of 29.5%) and 1,2-vinyl bond content of 39.6% (27.9% when reduced into whole polymer). Living lithium in the polymer was present in an amount of 1.00 mmol per 100 g of polymer.

Aufarbeitung

  1. customthe reaction mixture was subjected to polymerization for 1 hour
  2. customto polymerize for one hour
  3. custompolymerized for one hour

Quellen und Nachweise

ORD-Eintrag
ord-f7736a74c74a44e19187a776e49ec4d0
Quelldatensatz
uspto-grants-2000_02
Patentnummer
US06020439

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