The determination of unsaturation in ethylene propylene terpolymers

✍ Scribed by Marjorie E. Tunnicliffe; Duncan A. Mackillop; Rudolf Hank

• Publisher: Elsevier Science
• Year: 1965
• Tongue: English
• Weight: 471 KB
• Volume: 1
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(65)90027-3

✦ Synopsis

The reaction between unsaturated ethylene propylene terpolymers and iodine monoehloride has been investigated for dicyclopentadiene and other terpolymer units, and for some model olefines.

Dicyclopentadiene terpolymers undergo addition with very slight side reactions, and a correct result can be obtained. With terpolymers from 1:4 hexadiene or 1:7 octadiene as the unsaturated component the side reactions are still minor, and the unsaturation can be determined with an acceptable degree of accuracy. Cyclo-octadiene terpolymers, on the other hand, undergo extensive elimination and further addition reactions, and their unsaturation can only be determined empirically.

The variable reactivity of ethylene propylene copolyrners introduces an unknown but usually small error into the determination for all unsaturated terpolymers.