The examination of synthetic rubbers prepared by the copolymerization of butadiene with various olefins has shown that the nature of the olefin exerts a considerable influence on the properties of the rubbers obtained. Relative to butadtenestyrene rubbers the butadiene- dichlorostyrene rubbers are more easily milled and processed and show better hot tensile strength. The butadienevinylpyridine rubbers are outstanding in tensile strength but are ...
