Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers
Abstract
Here, 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 (R or S) 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 [mm]% ~ 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.
- Authors:
-
- Univ. of California, Santa Barbara, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1346162
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Polymer Chemistry
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 9; Journal ID: ISSN 1759-9954
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
McGrath, Alaina J., Shi, Weichao, Rodriguez, Christina G., Kramer, Edward J., Hawker, Craig J., and Lynd, Nathaniel A. Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers. United States: N. p., 2014.
Web. doi:10.1039/c4py01503g.
McGrath, Alaina J., Shi, Weichao, Rodriguez, Christina G., Kramer, Edward J., Hawker, Craig J., & Lynd, Nathaniel A. Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers. United States. https://doi.org/10.1039/c4py01503g
McGrath, Alaina J., Shi, Weichao, Rodriguez, Christina G., Kramer, Edward J., Hawker, Craig J., and Lynd, Nathaniel A. Thu .
"Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers". United States. https://doi.org/10.1039/c4py01503g. https://www.osti.gov/servlets/purl/1346162.
@article{osti_1346162,
title = {Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers},
author = {McGrath, Alaina J. and Shi, Weichao and Rodriguez, Christina G. and Kramer, Edward J. and Hawker, Craig J. and Lynd, Nathaniel A.},
abstractNote = {Here, 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 (R or S) 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 [mm]% ~ 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.},
doi = {10.1039/c4py01503g},
journal = {Polymer Chemistry},
number = 9,
volume = 6,
place = {United States},
year = {Thu Dec 11 00:00:00 EST 2014},
month = {Thu Dec 11 00:00:00 EST 2014}
}
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