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Modification of a thermoplastic elastomer gel through the addition of an endblock-selective homopolymer

1999; Wiley; Volume: 37; Issue: 15 Linguagem: Inglês

10.1002/(sici)1099-0488(19990801)37

1099-0488

Nicole R. Jackson, Elizabeth A. Wilder, Scott A. White, Rudy Bukovnik, Richard J. Spontak,

Polymer composites and self-healing

Journal of Polymer Science Part B: Polymer PhysicsVolume 37, Issue 15 p. 1863-1872 Article Modification of a thermoplastic elastomer gel through the addition of an endblock-selective homopolymer Nicole R. Jackson, Nicole R. Jackson Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695Search for more papers by this authorElizabeth A. Wilder, Elizabeth A. Wilder Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695Search for more papers by this authorScott A. White, Scott A. White Polymer Science and Technology Department, Becton Dickinson Research Center, Research Triangle Park, North Carolina 27709Search for more papers by this authorRudy Bukovnik, Rudy Bukovnik Telecom and Electrical Products Division, Raychem Corporation, Fuquay-Varina, North Carolina 27526Search for more papers by this authorRichard J. Spontak, Corresponding Author Richard J. Spontak [email protected] Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695 Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695Search for more papers by this author Nicole R. Jackson, Nicole R. Jackson Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695Search for more papers by this authorElizabeth A. Wilder, Elizabeth A. Wilder Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695Search for more papers by this authorScott A. White, Scott A. White Polymer Science and Technology Department, Becton Dickinson Research Center, Research Triangle Park, North Carolina 27709Search for more papers by this authorRudy Bukovnik, Rudy Bukovnik Telecom and Electrical Products Division, Raychem Corporation, Fuquay-Varina, North Carolina 27526Search for more papers by this authorRichard J. Spontak, Corresponding Author Richard J. Spontak [email protected] Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695 Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695Search for more papers by this author First published: 29 June 1999 https://doi.org/10.1002/(SICI)1099-0488(19990801)37:15 3.0.CO;2-XCitations: 14AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Addition of a midblock-selective oil to an ABA triblock copolymer with a rubbery B-midblock and thermoplastic A-endblocks yields a thermoplastic elastomer gel (TPEG) if the oil constitutes the majority blend constituent and a physically crosslinked network, responsible for solid-like mechanical properties, is retained. These blends typically exhibit a micellar morphology in which the micellar cores are composed of the oil-incompatible A-endblocks. Since the micelles serve as crosslink sites, the properties of TPEGs depend on (i) the intrinsic characteristics of the solid-state endblocks, and (ii) the degree to which the micelles interact through bridged and looped midblocks. In this work, a poly[styrene-b-(ethylene-co-butylene)-b-styrene] triblock copolymer and an aliphatic oil are used to prepare TPEGs into which poly(2,6-dimethylphenylene oxide) (PPO), a styrene-compatible homopolymer, is added. The morphologies and bulk properties of these ternary systems are examined by electron microscopy, viscometry, and dynamic rheology. A slight increase in the PPO content in these TPEGs promotes increases in micelle size, confirming that the PPO primarily resides within the micelles, and disordering temperature, signified by an abrupt change in rheological properties. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 1863–1872, 1999 REFERENCES AND NOTES 1 Bates, F. S.; Fredrickson, G. H. Annu Rev Phys Chem 1990, 41, 525. 2 Binder, K. Adv Polym Sci 1994, 112, 181. 3 Fredrickson, G. H.; Bates, F. S. Annu Rev Mater Sci 1996, 26, 501. 4 Lohse, D. J.; Hadjichristidis, N. Curr Opin Coll Interface Sci 1997, 2, 171. 5 Mortensen, K. Curr Opin Coll Interface Sci 1998, 3, 12. 6 Förster, S.; Khandpur, A. K.; Zhao, J.; Bates, F. S.; Hamley, I. W.; Ryan, A. J.; Bras, W. Macromolecules 1994, 27, 6922. 7 Khandpur, A. K.; Förster, S.; Bates, F. S.; Hamley, I. W.; Ryan, A. 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