Study on the non-isothermal crystallization behaviors of PA6/silica nanocomposites prepared by the sol–gel process

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• 作者：Caixian Zhao ; Ping Zhang ; Shaorong Lu ; Jiangping He and Xiayu Wang
• 刊名：Journal of Materials Science
• 出版年：2007
• 出版时间：November, 2007
• 年：2007
• 卷：42
• 期：21
• 页码：9083-9091
• 全文大小：672 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

A organic–inorganic PA6/partially functionalized silica hybrid nanocomposites was prepared by caprolactam polymerized and silica nanoparticles in situ gernerated through condensation of partially functionalized silicic acid, which was prepared through hydrolysis of tetraethoxysilane (TEOS) and 3-glycidoxypropyltrimethoxysilane (GPTES), in one process. The non-isothermal crystallization behaviors of pure PA6, PA6/unfunctionalized silica (PA6S) and PA6/functionalized silica (PA6FS) hybrid materials were investigated by differential scanning calorimetry (DSC). Two methods, namely, the Avrami and the Mo, were applied to describe the crystallization process of these three materials. DSC results showed that the crystallization rates of PA6FS is faster than that of pure PA6 and PA6S at the same cooling rate, the nano-silica particles functionalized by GPS in hybrid material acted as more effective nucleation agents, and the crystallization rates of all these samples increased with the cooling rate increasing. XRD results indicated that the addition of functionalized nano-silica particles favored the formation of the γ crystalline form.