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MANUFACTURING METHOD OF POLYPROPYLENE CARBONATE CAPABLE OF IMPROVING THERMAL STABILITY OF POLYPROPYLENE CARBONATE RESIN BY INTRODUCING URETHANE GROUP AND SEALING ENDS OF THE POLYPROPYLENE CARBONATE
MANUFACTURING METHOD OF POLYPROPYLENE CARBONATE CAPABLE OF IMPROVING THERMAL STABILITY OF POLYPROPYLENE CARBONATE RESIN BY INTRODUCING URETHANE GROUP AND SEALING ENDS OF THE POLYPROPYLENE CARBONATE
PURPOSE: A manufacturing method of polypropylene carbonate resin is provided to increase thermal stability while maintaining molecular weight or physicochemical property of the polypropylene carbonate.;CONSTITUTION: A manufacturing method of polypropylene carbonate resin comprises the following step: reacting polyols which include polypropylene carbonate resin containing hydroxyl group at one end with alkylisocyanates or diisocyanates with a reactive extrusion method. The alkyl isocyanate is alkyl isocyanate having less than 14 carbons or alkyl isocyanate which includes an aromatic group within a molecule. The polyol is a mixture including 100.0 parts by weight of polypropylene carbonate resin and 2-25 parts by weight of a third polyol.;COPYRIGHT KIPO 2012
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