Structure and thermal behaviour of nylon 6 nanocomposites
| Autor: | Xiong-Yan Zhao, Ming-Zhu Wang |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Nanocomposite Polymers and Plastics Annealing (metallurgy) General Chemistry Endothermic process Surfaces Coatings and Films Amorphous solid Crystal chemistry.chemical_compound Nylon 6 Differential scanning calorimetry chemistry Polymorphism (materials science) Polymer chemistry Materials Chemistry Composite material |
| Zdroj: | Journal of Applied Polymer Science. 100:3116-3122 |
| ISSN: | 1097-4628 0021-8995 |
| Popis: | In this article, nylon 6/clay nanocomposites with 5 wt % clay (NCN5) were prepared by a twin screw extruder. The effects of annealing including solid-state annealing (170 and 190°C) and melt-state annealing (240°C) on the polymorphic behavior and thermal property of NCN5 and nylon 6 have been comparatively studied as a function of annealing time using modified differential scanning calorimetry (MDSC) and wide-angle X-ray diffraction. It was demonstrated that NCN5 and nylon 6 exhibit a similar polymorphic behavior when they were annealed at 190°C for different time durations. As the annealing temperature was elevated to 240°C, significant differences in thermal behavior and polymorphism between NCN5 and nylon 6 could be found. For example, the α crystal became the absolutely dominating crystalline phase for NCN5 sample independent on the annealing durations, whereas the formation of γ crystal is greatly enhanced in neat nylon 6 with increasing annealing time. Moreover, a small endothermic peak is observed around 180°C in both nylon 6 and NCN5 samples annealed at 170 and 190°C, which might be related to the melting of microcrystals formed in the amorphous regions during annealing. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3116–3122, 2006 |
| Databáze: | OpenAIRE |
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