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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).
Iran BR with high content of cis-1.4 structural units has the best elastic properties. Presence of other structural units in BR significantly limits its crystallization ability, thus BR have low tensile strengths.
