Ring-opening polymerization of unsaturated alicyclic compounds

✍ Scribed by Calderon, Nissim ;Ofstead, Eilert A. ;Judy, W. Allen

• Book ID: 104534227
• Publisher: Wiley (John Wiley & Sons)
• Year: 1967
• Tongue: English
• Weight: 508 KB
• Volume: 5
• Category: Article
• ISSN: 0449-296X
• DOI: 10.1002/pol.1967.150050901

✦ Synopsis

The ring-opening polymerizations of cyclooctene, cyclododecene, 1,5cyclooctadiene, 1,5,9-~yclododecatriene, 3-methylcyclooctene, and 3-phenylcyclooctene have been carried out by using a twycomponent catalyst system composed of ethylaluminum dichloride and tungsten hexachloride. NMR and infrared analyses of the respective polymers indicate structures which are consistent with a ring-cleavage mode of propagation. No evidence for double-bond shifts or transannular reactions during the polymerizations of 1,5cyclooctadiene, 1,5,9-~yclododecatriene, 3-methylcyclooctene, and 3-phenylcyclooctene was found. The polymerizability of substituted, unsaturated, mediumsized alioyclic monomers suggests a convenient method for synthesis of certain perfectly alternating terpolymers. Since polymerizations occurred rapidly with little evolution of heat, it was concluded that entropy is a substantial contributor to the free energy of the ring-opening polymerization of medium-sized, unsaturated alicyclic monomers.