Synthetic Strategy for Preparing Chiral Double-semicrystalline Polyether Block Copolymers

We report an effective strategy for the synthesis of semi-crystalline block copolyethers with well-defined architecture and stereochemistry. As an exemplary system, triblock copolymers containing either atactic (racemic) or isotactic ( or ) poly(propylene oxide) end blocks with a central poly(ethyle...

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Bibliographic Details
Published in:Polymer chemistry 2015-03, Vol.6 (9), p.1465-1473
Main Authors: McGrath, Alaina J, Shi, Weichao, Rodriguez, Christina G, Kramer, Edward J, Hawker, Craig J, Lynd, Nathaniel A
Format: Article
Language:English
Subjects:
Block copolymers
Isotactic
MATERIALS SCIENCE
Optical microscopy
Oxides
Polymerization
Resultants
Stereochemistry
Strategy
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Summary:We report an effective strategy for the synthesis of semi-crystalline block copolyethers with well-defined architecture and stereochemistry. As an exemplary system, triblock copolymers containing either atactic (racemic) or isotactic ( or ) poly(propylene oxide) end blocks with a central poly(ethylene oxide) mid-block were prepared by anionic ring-opening procedures. Stereochemical control was achieved by an initial hydrolytic kinetic resolution of racemic terminal epoxides followed by anionic ring-opening polymerization of the enantiopure monomer feedstock. The resultant triblock copolymers were highly isotactic (meso triads [ ]% ~ 90%) with optical microscopy, differential scanning calorimetry, wide angle x-ray scattering and small angle x-ray scattering being used to probe the impact of the isotacticity on the resultant polymer and hydrogel properties.
ISSN:1759-9954
1759-9962
DOI:10.1039/c4py01503g