| Tuning the Mechanical Properties of Composites from Elastomeric to Rigid Thermoplastic by Controlled Addition of Carbon Nanotubes. | |
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MedLine Citation:
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PMID: 21538861 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A commercial thermoplastic polyurethane is identified for which the addition of nanotubes dramatically improves its mechanical properties. Increasing the nanotube content from 0% to 40% results in an increase in modulus, Y, (0.4-2.2 GPa) and stress at 3% strain, σ(ϵ = 3%) , (10-50 MPa), no significant change in ultimate tensile strength, σ(B) , (≈50 MPa) and decreases in strain at break, ϵ(B) , (555-3%) and toughness, T, (177-1 MJ m(-3) ). This variation in properties spans the range from compliant and ductile, like an elastomer, at low mass fractions to stiff and brittle, like a rigid thermoplastic, at high nanotube content. For mid-range nanotube contents (≈15%) the material behaves like a rigid thermoplastic with large ductility: Y = 1.5 GPa, σ(ϵ = 3%) = 36 MPa, σ(B) = 55 MPa, ϵ(B) = 100% and T = 50 MJ m(-3) . Analysis suggests that soft polyurethane segments are immobilized by adsorption onto the nanotubes, resulting in large changes in mechanical properties. |
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Authors:
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Umar Khan; Peter May; Arlene O'Neill; Juan J Vilatela; Alan H Windle; Jonathan N Coleman |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-29 |
Journal Detail:
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Title: Small (Weinheim an der Bergstrasse, Germany) Volume: - ISSN: 1613-6829 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-5-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101235338 Medline TA: Small Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Affiliation:
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School of Physics and CRANN, Trinity College Dublin, Dublin 2, Ireland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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