{HEAD ~ The multi branched diene polymers} obtained by gas phase anionic polymerization employing the catalysts exhibit {TAIL ~ desirable properties}, such as an extremely high molecular weight, a controlled molecular weight distribution, Tg and vinyl content, and the ability to readily absorb hydrocarbon solvents and oils 
{ HEAD ~ The multi branched diene polymers } obtained by gas phase anionic polymerization employing the catalysts exhibit { TAIL ~ desirable properties } , such as an extremely high molecular weight , a controlled molecular weight distribution , Tg and vinyl content , and the ability to readily absorb hydrocarbon solvents and oils
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