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Ethylidene norborene

Polymerization of ethylene and propylene results in a saturated copolymer. In order to vulcanize this rubber, some unsaturation has to be introduced. This is commonly done by adding a few percent of non-conjugated diene (termonomer) such as dicyclopentadiene, 1,4-hexadiene, or ethylidene norborene during the polymerization. Since only one of the double bonds of the diene reacts during polymerization, the other is free for vulcanization. The amount of unsaturation left in the ethylene propylene diene terpolymer is of great interest because the vulcanization properties will be affected. [Pg.77]

Thermoplastic resin compositions consisting of ethylene, propylene, 5-ethylidene-2-norborene, and trimethylsilyl 4-methyl-tetracyclo[6.2.1.1 . 0 ]-dodec-9-ene -carboxylate were prepared and hydrolyzed into the corresponding carboxylic acid. These materials are useful as transparent resins in automotive components. [Pg.692]

Ethylene-propylene copolymers, EPR, and ter-polymers containing diene monomers, EPDM, crosslink on irradiation [Bradley, 1984 Aoshima et al, 1992]. The crosslinking can be enhanced by the use of crosslinking agents for example, EPDM containing 5-ethylidene-2-norborene, ENB, may be efficiently radiation crosslinked. Analogues of reaction (R-30) contribute to such crosslinking. [Pg.773]

Insufficient toxicolcgloal data on harmful effects to humans. Explosive limits not given in the literature. For safety purposes TLV tor 5-ethylidene-2-norborene is usually a good guide (TLV TWA C Sppm and C 25mg/m ). [Pg.921]


See other pages where Ethylidene norborene is mentioned: [Pg.332]    [Pg.1400]    [Pg.332]    [Pg.1400]    [Pg.693]    [Pg.694]    [Pg.694]   
See also in sourсe #XX -- [ Pg.67 ]

See also in sourсe #XX -- [ Pg.67 ]




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