ationincluding polyolefins such as low and high density polyethylene, polypropylene, polybutylene, polyisobutylene, polypentylene and polyisopentylene, vinyl polymers such as polystyrene, polydienes such as polybutadiene and polyisoprene, and copolymers ofolefins and dienes with other ethylenically and acetylenically unsaturated monomers such as ethylene-propylene copolymers, ethylene-butene copol