typically has a trans isomer content of at least about 70 in most cases the tpbd made by the process of this invention will have a trans isomer content which is within the range of about 75 to about 85 the polymerizations of this invention result in the formation of solutions containing the tpbd standard techniques can be utilized to recover the tpbd from the solution in which it is dissolved coagulation techniques will typically be employed to recover the tpbd from the organic solvent such coagulation procedures typically involve the addition of an alcohol or ketone to the tpbd solution to induce coagulation however the tpbd can also be recovered from the organic solvent by evaporation procedures such as steam stripping such evaporation procedures typically involve heating the polymer solution to a slightly elevated temperature in conjunction with the application of vacuum the tpbd made utilizing the techniques of this invention is a thermoplastic resin it can be molded into various useful articles because the tpbd contains many double bonds in its backbone it can also be blended and cocured with rubbers despite the fact that tpbd of this invention is a thermoplastic resin it becomes elastomeric when cured alone or when cocured with one or more rubbers tpbd has the ability to strain crystallize which improves properties such as tensile strength tear strength and flex fatigue it can accordingly be used in manufacturing rubber articles such as hoses belts and tires which have improved performance characteristics this invention is illustrated by the following examples which are.