Catalyst Systems for Ring-Opening Polymerization Processes to Produce Syndiotactic Polymer

Catalyst systems useful in ring-opening polymerization of β-butyrolactone to produce syndiotactic PHB are provided. The catalyst systems include a ligand of the structural Formula I, Formula II, or Formula III and a Group 3 metal or metal precursor such as yttrium. The present catalyst systems are u...

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Hauptverfasser: Holtcamp, Matthew W, Lopez-Barron, Carlos R, Wright, Pamela J, Culcu, Gursu, Faler, Catherine A, Mattler, Sarah J
Format: Patent
Sprache:eng
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Zusammenfassung:Catalyst systems useful in ring-opening polymerization of β-butyrolactone to produce syndiotactic PHB are provided. The catalyst systems include a ligand of the structural Formula I, Formula II, or Formula III and a Group 3 metal or metal precursor such as yttrium. The present catalyst systems are useful in adjusting syndiotacticity and thereby lowering the Tm of PHB for use in commercial applications.