Polymerizations of diolefins

Claim 1

IN A PROCESS OF POLYMERIZING CONJUGATED 1,3-DIOLEFINS BY MEANS OF ORGANO-METALLIC CATALYSTS TO FORM STEREOSPECIFIC SPATIALLY ORIENTED POLYMERS THE IMPROVEMENT COMPRISING ADDING TO THE POLYMERIZATION MIXTURE, PRIOR TO CATALYST DEACTIVATION, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ARYL-AZO COMPOUNDS OF THE FORMULA R-N=N-R$ WHEREIN R AND r$ ARE SELECTED FROM THE GROUP OF RADICALS CONSISTING OF PHENYL THE HALOGEN SUBSTITUTED PHENYLS, THE LOWER ALKYL SUBSTITUTED PHENYLS, THE LOWER ALKOXY SUBSTITUTED PHENYLS, THE ARYL SUBSTITUTED PHENYLS, THE ARYLOXY SUBSTITUTED PHENYLS, NAPHTHYL, THE HALOGEN SUBSTITUTED NAPHTHYLS, THE LOWER ALKYL SUBSTITUTED NAPHTHYLS, THE LOWER ALKOXY SUBSTITUTED NAPHTHYLS, THE ARYL SUBSTITUTED NAPHTHYLS AND THE ARYLOXY SUBSTITUTED NAPHTHYLS ALLOWING THE MOLECULAR WEIGHT OF THE POLYMERS TO INCREASE AND ISOLATING THE POLYMERS FROM THE REACTION MIXTURE.