Flammability and phase-transition studies of nylon 6/montmorillonite nanocomposites

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• 作者：Shaofeng Wang ; Yuan Hu ; Zhenlong Li ; Zhengzhou Wang ; Yonglong Zhuang ; Zuyao Chen and Weicheng Fan
• 刊名：Colloid & Polymer Science
• 出版年：2003
• 出版时间：October 2003
• 年：2003
• 卷：281
• 期：10
• 页码：951-956
• 全文大小：279 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Physical Chemistry
  Soft Matter and Complex Fluids
  Characterization and Evaluation Materials
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-1536

文摘

Nylon 6 (PA6)/clay hybrids have been prepared using a direct melt intercalation technique by two processes. One is PA6 melt-mixing with modified clay, the other is PA6 melt-mixing with natural (Na + base) clay using an ammonium salt bearing long alkyl chains as a polymer/clay reactive compatibilizer. Their structure and flammability properties are characterized by X-ray diffraction, transmission electron microscopy and cone calorimeter experiments. The results of the cone calorimeter experiments show that hybrids made by these two processes have a lower heat release rate peak and higher thermal stability than that of original PA6. Meanwhile, X-ray diffraction was used to investigate PA6/clay hybrids with various cooling histories from the melt, including medium-rate cooling (air cooling) and rapid cooling (water-quenched). In contrast to pure PA6 dominated by the a phase, the addition of clay silicate layers by these two methods favors the formation of the ? crystalline phase in PA6/clay hybrids. Flammability and phase-transition studies confirm that silicate layers added by these two methods have a similar nanoeffect and nanodispersion in the PA6 matrix.