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

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
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
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creator Holtcamp, Matthew W
Lopez-Barron, Carlos R
Wright, Pamela J
Culcu, Gursu
Faler, Catherine A
Mattler, Sarah J
description 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.
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title Catalyst Systems for Ring-Opening Polymerization Processes to Produce Syndiotactic Polymer
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