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McGrath AJ, Shi W, Rodriguez CG, Kramer EJ, Hawker CJ, Lynd NA. Synthetic Strategy for Preparing Chiral Double-semicrystalline Polyether Block Copolymers. Polym Chem 2015; 6:1465-1473. [PMID: 25914726 PMCID: PMC4408015 DOI: 10.1039/c4py01503g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
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.
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Affiliation(s)
- Alaina J. McGrath
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
| | - Weichao Shi
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
| | | | - Edward J. Kramer
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
- Materials Department, University of California, Santa Barbara, CA 93106, USA
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106, USA
| | - Craig J. Hawker
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
- Materials Department, University of California, Santa Barbara, CA 93106, USA
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA
| | - Nathaniel A. Lynd
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
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Affiliation(s)
- Yingfeng Yu
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China, and Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Macel.li Domingo s/n, 43007 Tarragona, Spain
| | - Minghai Wang
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China, and Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Macel.li Domingo s/n, 43007 Tarragona, Spain
| | - David Foix
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China, and Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Macel.li Domingo s/n, 43007 Tarragona, Spain
| | - Shanjun Li
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China, and Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Macel.li Domingo s/n, 43007 Tarragona, Spain
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