Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers

McGrath, Alaina J.; Shi, Weichao; Rodriguez, Christina G.; Kramer, Edward J.; Hawker, Craig J.; Lynd, Nathaniel A.

doi:10.1039/c4py01503g

Synthetic strategy for preparing chiral double-semicrystalline polyether block copolymers

Journal Article · Thu Dec 11 00:00:00 EST 2014 · Polymer Chemistry

DOI:https://doi.org/10.1039/c4py01503g· OSTI ID:1346162

McGrath, Alaina J. ^[1]; Shi, Weichao ^[2]; Rodriguez, Christina G. ^[2]; Kramer, Edward J. ^[2]; Hawker, Craig J. ^[2]; Lynd, Nathaniel A. ^[2]

Univ. of California, Santa Barbara, CA (United States); DOE Office of Scientific and Technical Information (OSTI)
Univ. of California, Santa Barbara, CA (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Santa Barbara, CA (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1346162

Journal Information:: Polymer Chemistry, Journal Name: Polymer Chemistry Journal Issue: 9 Vol. 6; ISSN PCOHC2; ISSN 1759-9954

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Bimetallic Chromium Catalysts with Chain Transfer Agents: A Route to Isotactic Poly(propylene oxide)s with Narrow Dispersities Morris, Lilliana S.; Childers, M. Ian; Coates, Geoffrey W. Angewandte Chemie International Edition, Vol. 57, Issue 20 https://doi.org/10.1002/anie.201801380	journal	April 2018
Controlled Synthesis of “Reverse Pluronic”‐Type Block Copolyethers with High Molar Masses for the Preparation of Hydrogels with Improved Mechanical Properties Markus, Felix; Bruckner, Johanna R.; Naumann, Stefan Macromolecular Chemistry and Physics, Vol. 221, Issue 3 https://doi.org/10.1002/macp.201900437	journal	December 2019
Recent progress in block copolymer crystallization Van Horn, Ryan M.; Steffen, Maxwell R.; O'Connor, Dana POLYMER CRYSTALLIZATION, Vol. 1, Issue 4 https://doi.org/10.1002/pcr2.10039	journal	December 2018
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