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Carbon Nanotube-Induced Changes of Crystal Growth In Polymer Films

Published online by Cambridge University Press:  01 February 2011

Georgi Yordanov Georgiev ,
Yaniel Cabrera ,
Lauren Wielgus ,
Zarnab Iftikhar ,
Michael Mattera ,
Peter Gati ,
Austin Potter  and
Peggy Cebe
Georgi Yordanov Georgiev
Affiliation:
georgi@alumni.tufts.eduggeorgie@assumption.edu, Assumption College, Natural Sciences, Worcester, Massachusetts, United States
Yaniel Cabrera
Affiliation:
yaniel.cabrera@gmail.com, Tufts University, Physics, Medford, Massachusetts, United States
Lauren Wielgus
Affiliation:
Lauren.Wielgus@tufts.edu, Tufts University, Physics, Medford, Massachusetts, United States
Zarnab Iftikhar
Affiliation:
ziftikhar@assumption.edu, Assumption College, Natural Sciences, Worcester, Massachusetts, United States
Michael Mattera
Affiliation:
mmattera@assumption.edu, Assumption College, Natural Sciences, Worcester, Massachusetts, United States
Peter Gati
Affiliation:
pgati@assumption.edu, Assumption College, Natural Sciences, Worcester, Massachusetts, United States
Austin Potter
Affiliation:
apotter@assumption.edu, Assumption College, Natural Sciences, Worcester, Massachusetts, United States
Peggy Cebe
Affiliation:
peggy.cebe@tufts.edu, Tufts University, Physics, Medford, Massachusetts, United States
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Abstract

Isotactic Polypropylene (iPP) nanocomposites with low concentrations of multiwall carbon nanotubes (CNTs) 0-1% were studied, using differential scanning calorimetry and Avrami analysis. The nanocomposites were isothermally crystallized at 135°C, in order to measure the effect of nanotubes on the kinetics of crystallization. In our study there is a great effect of the CNTs on the iPP crystallization kinetics. The Avrami analysis shows increase in the crystallization rate constant and constancy the Avrami exponent with increase of the CNTs concentration. The full width at half maximum (FWHM) of the heat flow exotherm and the peak time for crystallization (tp) change dramatically. For iPP, the carbon nanotubes serve as nucleation agents to speed up the crystallization process.

Keywords

polymercrystal growthcalorimetry
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1150: Symposium RR – Artificially Induced Grain Alignment in Thin Films , 2008 , 1150-RR04-16
Copyright
Copyright © Materials Research Society 2009

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References

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