Representatives examples of useful homopolymers include the homopolymers such as polyethylene, polypropylene, poly(1-butene), poly(3-methyl-l-butene), poly( 3-methyll -pentene poly( 4-methyl- 1 -pentene) poly(4,4-dimethyl- 1 -pentene poly( 3-methyl' l -hexene), poly(4-methyl-lhexene), and poly(4,4-dimethyl-l-hexene).