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Molecular Disorder in Prestrained Nanocomposites: Effects of Processing on Durability of Thermally-Active Ethylene-Vinyl Acetate | PyChol | Multiwall Carbon Nanotubes

Published online by Cambridge University Press:  18 May 2015

Allen D. Winter ,
Cherno Jaye ,
Daniel Fischer ,
Maria Omastová  and
Eva M. Campo
Allen D. Winter
Affiliation:
School of Electronic Engineering, Bangor University, Bangor LL57 1UT, U.K.
Cherno Jaye
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, U.S.A.
Daniel Fischer
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, U.S.A.
Maria Omastová
Affiliation:
Polymer Institute, Slovak Academy of Sciences, Bratislava 84541, Slovak Republic.
Eva M. Campo
Affiliation:
School of Electronic Engineering, Bangor University, Bangor LL57 1UT, U.K. Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, U.S.A.
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Abstract

In situ temperature-resolved Near-edge X-ray Absorption Fine Structure (NEXAFS) measurements were performed on thermo-active ethylene-vinyl acetate (EVA) – multiwall carbon nanotube (MWCNT) composites 12 months following synthesis, and compared with spectra acquired shortly after synthesis to examine aging effects on non-covalent interactions. Room temperature spectra revealed no difference between unstrained and strained composites, suggesting relaxation. Further, energy shifts in π* C=C resonances indicated a change in π–π interactions between MWCNT walls and chemical dispersant, supported also by AFM phase imaging. Temperature-resolved NEXAFS analysis showed a lack of interaction between nanotubes and polymeric chains, suggesting the chemical dispersant unlatched from MWCNT walls. The extent of this effect is finally quantified through a comparative study of spectral trends.

Keywords

absorptionbondingpolymer
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1718: Symposium B – Multifunctional Polymeric and Hybrid Materials , 2015 , pp. 21 - 26
Copyright
Copyright © Materials Research Society 2015 

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