Crystalline Transformations in Nylon-6/Single-Walled Carbon Nanotube Nanocomposites

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Abstract:

Nylon-6/single-walled carbon nanotube (SWNT) nanocomposites with different SWNTs loadings were prepared by melt-blending. An efficient dispersion of SWNTs into the nylon-6 matrix was confirmed by scanning electron microscopy. DSC and time-resolved synchrotron X-ray diffraction were used to provide detailed information on the effect of SWNTs on the crystalline phase transition of nylon-6 in the nanocomposites. The incorporation of SWNTs accelerated the crystallization rate of nylon-6 due to a nucleating effect. The variable-temperature WAXS experiments, in both neat nylon-6 and nylon-6 nanocomposites, showed that the crystallization from the melt occured through the formation of the pseudo-hexagonal crystal form () and its transformation to the monoclinic form (α) on cooling. Additionally, this crystalline transition was reversible as observed upon heating. The α crystalline transformation temperature of nylon-6 was dependent on heating rate and, more importantly, on the SWNT content.

Keywords: MORPHOLOGY; NYLON-6/SWNTS; PHASE TRANSITION; TIME-RESOLVED SYNCHROTRON X-RAY DIFFRACTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.1558

Publication date: October 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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