Structure and thermal stability of PMMA/MMT nanocomposites as denture base material

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• 作者：Xiang Wang (1)
  Qiang Su (1)
  Yumei Hu (1)
  Chuanzeng Wang (1)
  Junping Zheng (1)
  
• 关键词：PMMA ; Nanocomposite ; Suspension polymerization ; Thermal stability
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：115
• 期：2
• 页码：1143-1151
• 全文大小：515 KB
• 作者单位：Xiang Wang (1)
  Qiang Su (1)
  Yumei Hu (1)
  Chuanzeng Wang (1)
  Junping Zheng (1)
  
  1. Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, People’s Republic of China
  
• ISSN：1572-8943

文摘

Poly(methyl methacrylate) (PMMA)/montmorillonite (MMT) nanocomposites were prepared by in situ suspension polymerization. MMT was previously organically modified by three different intercalating agents: methacrylatoethyl trimethyl ammonium chloride (DMC), dodecylamine (12CNH), and hexadecyl allyl ammonium chloride (HADC). The structures of the nanocomposites were investigated by X-ray diffraction and transmission electron microscopy, while the interaction between PMMA and MMT was characterized by Fourier transform infrared spectroscopy. The molecular mass of the extracted PMMA was measured by gel permeation chromatography. The thermal stability of PMMA/MMT nanocomposites was evaluated by thermogravimetric and differential scanning calorimetry. The results indicated that PMMA/MMT nanocomposites were successfully prepared and the interaction between PMMA and MMT of PMMA/MMT–HADC nanocomposites was the strongest. The thermal stability of the nanocomposites was improved and found to be optimal for PMMA/MMT–HADC with T 10 increasing to 304?°C, 52?°C higher than that of neat PMMA.