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<p>(ABS), <a href="page.php?w=Nitrile_rubber">nitrile-butadiene</a> (NBR), <a href="page.php?w=styrene-butadiene">styrene-butadiene</a> (SBR) and <a href="page.php?w=polybutadiene_acrylonitrile">polybutadiene acrylonitrile</a> (PBAN). These copolymers are tough and/or elastic depending on the ratio of the monomers used in their preparation. SBR is the material most commonly used for the production of automobile tires. Precursors to still other synthetic rubbers are prepared from butadiene. One is <a href="page.php?w=chloroprene">chloroprene</a>.</p><p>
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