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Journal of Materials Science

, Volume 41, Issue 21, pp 7225–7231 | Cite as

Synthesis, characterization and thermal history dependence of the polymorphic structure of nylon6/montmorillonite nanocomposites

  • Xiong-Yan Zhao
  • Ming-Zhu Wang
Article

Abstract

Nylon6/clay nanocomposites with 5-wt% montmorillonite (NCN5) were prepared by a twin-screw extruder. The effects of thermal histories including annealing temperature (195 °C, solid-state annealing; 245 °C, melt-state annealing), annealing time and cooling rate on the polymorphic behavior and thermal property of NCN5 have been studied using Modulated Differential Scanning Calorimetry (MDSC) and wide angle X-ray diffraction. It was found that longer annealing time and faster cooling rate favored the formation of the γ crystal when NCN5 samples were annealed at 195 °C. As the annealing temperature was elevated to 245 °C, the α crystal became the absolutely dominating crystalline phase independent on the annealing durations and cooling rate. Moreover, a small endothermic peak was observed around 195 °C in NCN5 samples and this new transition peak was also found to be dependent on the thermal history.

Keywords

Cool Rate Thermal History Melting Peak Annealing Duration Modulate Differential Scanning Calorimetry 

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.College of Material Science & EngineeringHebei University of Science and TechnologyShijiazhuangP.R. China
  2. 2.Hebei Province Analysis and Testing Research CentreHebei University of Science and TechnologyShijiazhuangP.R. China

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