The polymerization, copolymerization and terpolymerization of 1‐isopropylidene‐3a.4.7.7a‐tetrahydroindene by anionic coordinate, radical and anionic catalysts

Abstract

AbstractBy means of vanadium based anionic coordinate catalysts 1‐isopropylidene‐3a.4.7.7a‐tetrahydroindene (I) can be terpolymerized with ethylene and propylene and copolymerized with ethylene. IR, NMR, UV spectroscopic data, and mol. wt. distributions are reported for the polymers.The incorporation of I is predominantly by opening of the cyclohexene double bond. The content of I was generally less than 10 mole‐%.Attempts to obtain homopolymers of I and copolymers of propylene and I with this type of catalyst were unsuccessfull.No solid polymer could be produced from I by free radical or anionic catalysts. With AIBN only oligomers were obtained which had cyanoisobutyric groups attached to the conjugated double bond system. K or KNH2 in ammonia solution react with I in equimolar ratios to give waxy products which do not contain NH2 groups. With K di‐hydrogenated derivatives of I are formed.The results have been interpreted in terms of stabilized radicals and anions derived from I which are unable to propagate.