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Husted KL, Herzog-Arbeitman A, Kleinschmidt D, Zhang W, Sun Z, Fielitz AJ, Le AN, Zhong M, Johnson JA. Pendant Group Modifications Provide Graft Copolymer Silicones with Exceptionally Broad Thermomechanical Properties. ACS Cent Sci 2023; 9:36-47. [PMID: 36712487 PMCID: PMC9881205 DOI: 10.1021/acscentsci.2c01246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Indexed: 06/18/2023]
Abstract
Graft copolymers offer a versatile platform for the design of self-assembling materials; however, simple strategies for precisely and independently controlling the thermomechanical and morphological properties of graft copolymers remain elusive. Here, using a library of 92 polynorbornene-graft-polydimethylsiloxane (PDMS) copolymers, we discover a versatile backbone-pendant sequence-control strategy that addresses this challenge. Small structural variations of pendant groups, e.g., cyclohexyl versus n-hexyl, of small-molecule comonomers have dramatic impacts on order-to-disorder transitions, glass transitions, mechanical properties, and morphologies of statistical and block silicone-based graft copolymers, providing an exceptionally broad palette of designable materials properties. For example, statistical graft copolymers with high PDMS volume fractions yielded unbridged body-centered cubic morphologies that behaved as soft plastic crystals. By contrast, lamellae-forming graft copolymers provided robust, yet reprocessable silicone thermoplastics (TPs) with transition temperatures spanning over 160 °C and elastic moduli as high as 150 MPa despite being both unentangled and un-cross-linked. Altogether, this study reveals a new pendant-group-mediated self-assembly strategy that simplifies graft copolymer synthesis and enables access to a diverse family of silicone-based materials, setting the stage for the broader development of self-assembling materials with tailored performance specifications.
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Affiliation(s)
- Keith
E. L. Husted
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
| | - Abraham Herzog-Arbeitman
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
| | - Denise Kleinschmidt
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
| | - Wenxu Zhang
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
| | - Zehao Sun
- Department
of Materials Science and Engineering, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Alyssa J. Fielitz
- Core
R&D, Analytical Science, The Dow Chemical
Company, Midland, Michigan 48640, United States
| | - An N. Le
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Mingjiang Zhong
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Jeremiah A. Johnson
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
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Beebe JM, Ahn D, Eldred DV, Fielitz AJ, Heyl TR, Lee M, Mangold S, Pearce EZ, Reinhardt CW, Roggenbuck C, Scherzer JM, Shull KR, Silvaroli AJ, Tan YJ, Wang M. Photocured Simultaneous and Sequential PDMS/PMMA Interpenetrating Polymer Networks. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeremy M. Beebe
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | - Dongchan Ahn
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | - Donald V. Eldred
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | | | - Tyler R. Heyl
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Myoungbae Lee
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | - Shane Mangold
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | - Eric Z. Pearce
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | | | | | | | - Kenneth R. Shull
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Anthony J. Silvaroli
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Yu-Jing Tan
- The Dow Chemical Company, Midland, Michigan 48686, United States
| | - Muzhou Wang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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