Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 46, Issue 2, Pages 158-169Publisher
WILEY
DOI: 10.1002/polb.21351
Keywords
activation energy; isothermal crystallization kinetics; multi-walled carbon nanotube; nanocomposites; nylon 6
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The well dispersion of functionalized multi-walled carbon nanotube (f-MWCNT) in nylon 6 matrix was prepared by solution mixing techniques. The isothermal and nonisothermal crystallization kinetics of nylon 6 and nylon 6/f-MWCNT nanocomposites were studied by differential scanning calorimetry (DSC), X-ray diffraction and polarized optical microscopy analysis. DSC isothermal results revealed that the activation energy of nylon 6 extensively decreased by adding 1 wt % f-MWCNT into nylon 6, suggesting that the addition of small amount of f-MWCNT probably induces the heterogeneous nucleation. Nevertheless, the addition of more f-MWCNT into nylon 6 matrix reduced the transportation ability of polymer chains during crystallization process and thus increased the activation energy. The nonisothermal crystallization of nylon 6/f-MWCNT nanocomposites was also discussed. (C) 2007 Wiley Periodicals, Inc.
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