Preparation of poly(alkylene carbonate) containing cross-linked high molecular weight chains
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United States of America Patent
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Jul 22, 2014
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Mar 15, 2012
app pub date -
Sep 7, 2011
filing date -
Sep 9, 2010
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Abstract
Provided is preparation of poly(alkylene carbonate) through alternating copolymerization of carbon dioxide and epoxide. According to the disclosure, by introducing a diepoxide compound to alternating copolymerization of carbon dioxide and epoxide compound using a metal(III) prepared with salen-type ligands containing quaternary ammonium salt as a catalyst, some of the polymer chains may be cross-linked to thus increase an average molecular weight of the copolymer and extend a distribution of molecular weight. A resin prepared according to this method may have high mechanical strength and rheological advantages.
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