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Effect of Functionalization on the Crystallization Behavior of MWNT-PBT Nanocomposites

Published online by Cambridge University Press:  01 February 2011

Gaurav Mago ,
Carlos Velasco-Santos ,
Ana L. Martinez-Hernandez ,
Dilhan M. Kalyon  and
Frank T. Fisher
Gaurav Mago
Affiliation:
[email protected], Stevens Institute of Technology, Department of Mechanical Engineering, Castle Point at Hudson, Hoboken, NJ, 07030, United States
Carlos Velasco-Santos
Affiliation:
[email protected], Universidad Nacional Autonoma de Mexico, Centro de Fisica Aplicada y Technologia Avanzada, Queretaro, Mexico
Ana L. Martinez-Hernandez
Affiliation:
[email protected], Universidad Nacional Autonoma de Mexico, Centro de Fisica Aplicada y Technologia Avanzada, Queretaro, Mexico
Dilhan M. Kalyon
Affiliation:
[email protected], Stevens Institute of Technology, Department of Chemical, Biomedical and Materials Engineering, Hoboken, NJ, 07030, United States
Frank T. Fisher
Affiliation:
[email protected], Stevens Institute of Technology, Department of Mechanical Engineering, Hoboken, NJ, 07030, United States
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Abstract

There is tremendous interest in using low loadings of multiwalled carbon nanotubes (MWNTs) to enhance the multifunctional properties of polymers, with functionalization often pursued to increase the dispersion and effective reinforcement of MWNTs within the polymer. In our interest to understand the effect of MWNT functionalization on Poly (butylene terephthalate) (PBT) crystallization kinetics, morphology and mechanical properties, nanocomposites were fabricated with both as-received and carboxyl group (-COOH) functionalized MWNTs. Initial results indicate as-received and functionalized nanotubes alter the crystallization temperature and crystal size for quiescent samples. In addition, isothermal crystallization studies using an Advanced Rheometric Expansion System (ARES) show that the addition of MWNTs increases the rate of PBT crystallization. However, functionalization was found to decrease the rate of nanocomposite crystallization as compared to nanocomposites samples prepared using pristine MWNTs, suggesting that nanotube functionalization weakens the nucleation effect observed in the nanocomposite samples. These results suggest that semicrystalline polymer nanocomposite crystallization kinetics and morphology can be significantly influenced by nanoparticle functionalization and chemistry. Further study of how these changes impact the rheological and multifunctional properties of semicrystalline nanocomposite systems are ongoing.

Keywords

polymernanoscalecrystal
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH11-35
Copyright
Copyright © Materials Research Society 2008

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References

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