Divinylbenzene Chemical Properties
- Melting point:
- Boiling point:
- 195 °C(lit.)
- 0.919 g/mL at 20 °C
- vapor density
- 4.5 (vs air)
- vapor pressure
- 0.9 mm Hg ( 30 °C)
- refractive index
- Flash point:
- 148 °F
- storage temp.
- Specific Gravity
- Colorless to pale yellow
- explosive limit
- Water Solubility
- Miscible with ethanol and ether. Immiscible with water.
- Light Sensitive
- Stable in the presence of added inhibitor, but may polymerize in the absence of inhibitor. Light and heat sensitive. Incompatible with heavy metal salts, oxidizing agents, acids.
- CAS DataBase Reference
- 1321-74-0(CAS DataBase Reference)
- EPA Substance Registry System
- Divinylbenzene (1321-74-0)
- Hazard Codes
- Risk Statements
- Safety Statements
- NA 1993 / PGIII
- WGK Germany
- Autoignition Temperature
- 878 °F
- HS Code
- Hazardous Substances Data
- 1321-74-0(Hazardous Substances Data)
- LD50 orally in Rabbit: 4100 mg/kg LD50 dermal Rabbit 8000 mg/kg
Divinylbenzene Usage And Synthesis
Divinylbenzene is a clear yellow liquid with an aromatic odour. It is a highly flammable and reactive chemical, and the liquid and vapour are combustible. It is incompatible with strong acids and oxidising agents and peroxides. Divinylbenzene reacts vigorously with strong oxidising agents. It also reacts exothermically with both acids and bases, with reducing agents (such as alkali metals and hydrides), and release gaseous hydrogen. May react exothermically with both acids and bases or initiators undergo exothermic polymerisation. It is an extremely versatile chemical cross-linking agent used to improve polymer properties. Divinylbenzene has extensive industrial applications for example, in the manufacture of adhesives, plastics, elastomers, ceramics, biological materials, catalysts, membranes, pharmaceuticals, specialty polymers, and ion exchange resins, as coatings, divinyl benzene has been reported to improve surface properties of rubber goods for biomedical applications, used in photocurable protective coatings for wood, metal, glass, and plastic materials.
Divinylbenzene is a water-white to straw colored liquid. Slightly less dense than water and insoluble in water. Vapors may be toxic. Used in making rubber.Synthetic rubber is any one of a group of man-made elastomers that approximate one or more of the properties of natural rubber(polyisoprene). Divinylbenzene has been used in Styrene-Butadiene copolymers (SBR) as adhesives and as processing aids in the extrusion of general purpose rubbers. Rubbers used as impact modifiers such as Methacrylate-Butadiene-Styrene (MBS) have been improved with the inclusion of Divinylbenzene.
Divinylbenzene (DVB) is an extremelyversatile cross-linking agent that also improves polymer properties. it has been used to manufacture adhesives,plastics, elastomers, ceramics, biologicalmaterials, coatings, catalysts, membranes, pharmaceuticals, specialty polymers, and ion exchange resins.
DVB has been found to improve the hightemperature strength of adhesives used tobond aluminum to aluminum. Used in anacrylic hydrosol to bond Bakelite resin andpolyester film, DVB was found to increasecreep rupture time dramatically. DVB hasfound utility in cross-linked styrene/butadienepolymers used for caulks and mastics for theconstruction industry.
DVB has been used in the production ofreversed-phase packings for liquidchromatography. Highly cross-linkedpolystyrene packings have been shown tofunction under extreme conditions of highpressures and temperatures. Ion exchangechromatography (IEC) is applicable to theseparation of almost any type of chargedmolecule, from large proteins to smallnucleotides and amino acids.
- F. C. Huang, C. H. Ke, C. Y. Kao, W. C. Lee, Preparation and application of partially porous poly(styrene‐divinylbenzene) particles for lipase immobilization, Journal of Applied Polymer Science, 2001, vol. 80, pp. 39-46
- Teresa Norber-King, Toxicity Reduction and Toxicity Identification Evaluation for effluents, ambient waters, and other aqueous media, 2001, ISBN 1-880611-64-3
A water-white to straw colored liquid. Slightly less dense than water and insoluble in water. Flash point below 141°F. Vapors may be toxic. Used in making rubber.
Air & Water Reactions
Flammable. Insoluble in water.
Divinylbenzene may react vigorously with strong oxidizing agents. Can react exothermically with reducing agents (such as alkali metals and hydrides) to release gaseous hydrogen. May react exothermically with both acids and bases. May in the presence of various catalysts (such as acids) or initiators undergo exothermic polymerization. Inhibited by presence of an additive. When uninhibited violent polymerization may occur . Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.
Divinylbenzene is combustible.
Mildly toxic by ingestion. An eye irritant. Combustible. When heated to decomposition it emits acrid smoke and irritating fumes.
Purify divinylbenzene by dissolving in Et2O, shaking with H2O, drying over CaCl2, filtering, evaporating and distilling in vacuo. It polymerises within 2-3days unless 4-tertbutylcatechol (0.05%) is added as stabilizer. [Fries & Bestian Chem Ber 69 715 1936, Beilstein 5 III 1366.]
Divinylbenzene Preparation Products And Raw materials
- Benzoyl peroxide
- Potassium persulfate
- RARECHEM AL FD 0095
- Vinyl ester resin
- VINYL PROPIONATE
- Acetyl ketene
- AMBERLITE(R) XAD-1180
- 4-Vinylbenzoic acid
- Vinyl resin