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Divinylbenzene
Sep 10, 2018

All three isomers are colorless liquid and easy to polymerize. Containing 55% divinyl benzene to pale yellow liquid, freezing point - 87 ℃, boiling point 195 ℃, relative density 0.918 (25/25 ℃), the refractive index of 1.5621, flash point 61 ℃. Soluble in methanol, diethyl ether, 25 ℃ in the water solubility of 0.0025 g / 100 g of water. Flammable. Under normal temperature, it can self-polymerize, usually adding 0.2%, 4-dichloro-6-nitrophenol or 0.1% terbutyl catechol as stabilizer.



Preparation method: when ethylbenzene is prepared by alkylation of ethylene and benzene, diethylbenzene is obtained as a byproduct. The three isomers of diethylbenzene have similar boiling points and are difficult to separate. Therefore, the preparation of o-diethylbenzene, m-diethylbenzene and p-diethylbenzene is usually made by dehydrogenation.



Use: two ethylenes, diethylenes can copolymerize to form a three dimensional structure of non-fusible polymer. Therefore, it is a very useful crosslinker, widely used in ion-exchange resin, off-exchange membrane, ABS resin, polystyrene resin, unsaturated polyester resin, synthetic rubber, wood processing, carbon processing and so on.