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High-strength and low-stiffness composites of nanoclay-filled thermoplastic polyurethanes

2005; Wiley; Volume: 45; Issue: 11 Linguagem: Inglês

10.1002/pen.20373

1548-2634

Asim Pattanayak, Sadhan Jana,

Silicone and Siloxane Chemistry

Polymer Engineering & ScienceVolume 45, Issue 11 p. 1532-1539 Article High-strength and low-stiffness composites of nanoclay-filled thermoplastic polyurethanes Asim Pattanayak, Asim Pattanayak Department of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301Search for more papers by this authorSadhan C. Jana, Corresponding Author Sadhan C. Jana [email protected] Department of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301Department of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301Search for more papers by this author Asim Pattanayak, Asim Pattanayak Department of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301Search for more papers by this authorSadhan C. Jana, Corresponding Author Sadhan C. Jana [email protected] Department of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301Department of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301Search for more papers by this author First published: 04 October 2005 https://doi.org/10.1002/pen.20373Citations: 35AboutPDF 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 Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract In this study, bulk polymerized clay-tethered thermoplastic polyurethane (TPU) composites were synthesized that offered much improved tensile strength with negligible changes in tensile modulus. These composites contained intercalated, tethered layered silicate particles and were synthesized by mixing low molecular weight prepolymer chains containing unreacted –NCO groups with reactive layered silicate clay followed by catalyzed chain extension reaction with butanediol. The molar ratio of –NCO and –OH functional groups in the composite was varied between 1.0 and 1.2. It was found that an appreciable amount of –NCO groups was consumed in reaction with moisture present in the clay and some in quaternary ammonium ion-catalyzed dimerization and trimerization. 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