Butadiene rubber ( BR ) is rubber for general use. The most usage of butadiene rubber is tire sidewall,floor covering-bicycle tire,foot wear,rubber toy,cable and rubber pipes.They are produced by butadiene. It may be present in macromolecules in form of cis-1.4, trans-1.4 and 1.2 structural units. 1.2 units have pendant vinyl group, thus they may create isomeric forms (syndiotactic, isotactic or atactic).