• Source: Divinylbenzene

Divinylbenzene (DVB) is an organic compound with the chemical formula C6H4(CH=CH2)2 and structure H2C=CH−C6H4−HC=CH2 (a benzene ring with two vinyl groups as substituents). It is related to styrene (vinylbenzene, C6H5−CH=CH2) by the addition of a second vinyl group. It is a colorless liquid manufactured by the thermal dehydrogenation of isomeric diethylbenzenes. Under synthesis conditions, o-divinylbenzene converts to naphthalene and thus is not a component of the usual mixtures of DVB.




Production and use


It is produced by dehydrogenation of diethylbenzene:

C6H4(C2H5)2 → C6H4(C2H3)2 + 2 H2
Divinylbenzene is usually encountered as a 2:1 mixture of m- and p-divinylbenzene, containing also the corresponding isomers of ethylvinylbenzene.
Styrene and divinylbenzene react to form the copolymer styrene-divinylbenzene, S-DVB or Sty-DVB. The resulting cross-linked polymer is mainly used for the production of ion exchange resin and Merrifield resins for peptide synthesis.




Nomenclature


Ortho: variously known as 1,2-diethenylbenzene, 1,2-divinylbenzene, o-vinylstyrene, o-divinylbenzene
Meta: known as 1,3-diethenylbenzene, 1,3-divinylbenzene, m-vinylstyrene, m-divinylbenzene
Para: known as 1,4-diethenylbenzene, 1,4-divinylbenzene, p-vinylstyrene, p-divinylbenzene.
These compounds are systematically called diethenylbenzene, although this nomenclature is rarely encountered.




References

Kata Kunci Pencarian:

• Divinylbenzene
• 4-tert-Butylcatechol
• Structural unit
• Siraitia grosvenorii
• Colestyramine
• Ion-exchange resin
• Patiromer
• Benzene
• Polyacrylonitrile
• Toluene