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<p><b>Polycarbonates</b> (<b>PC</b>) are a group of <a href="page.php?w=thermoplastic">thermoplastic</a> polymers containing <a href="page.php?w=carbonate_ester">carbonate group</a>s in their chemical structures. Polycarbonates used in engineering are strong, <a href="page.php?w=toughness">tough</a> materials, and some grades are optically transparent. They are easily worked, <a href="page.php?w=injection_molding">molded</a>, and <a href="page.php?w=thermoforming">thermoformed</a>.  Because</p><p>
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