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高等学校化学研究 ›› 2010, Vol. 26 ›› Issue (1): 152-156.

• Articles • 上一篇    下一篇

Crystallization Behavior and Thermal Properties of PP/MgAl LDH Nanocomposites Prepared in Non-polar Solution

CUI Zhe, ZHANG Guo-ying and QU Bao-jun*   

  1. State Key Laboratory of Fire Science, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
  • 收稿日期:2009-01-05 修回日期:2009-02-23 出版日期:2010-01-04 发布日期:2010-03-29
  • 通讯作者: QU Bao-jun. E-mail: qubj@ustc.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China(No.50373039) and the National Key Basic Research Special Foundation Project of China(No.2001CB409600).

Crystallization Behavior and Thermal Properties of PP/MgAl LDH Nanocomposites Prepared in Non-polar Solution

CUI Zhe, ZHANG Guo-ying and QU Bao-jun*   

  1. State Key Laboratory of Fire Science, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2009-01-05 Revised:2009-02-23 Online:2010-01-04 Published:2010-03-29
  • Contact: QU Bao-jun. E-mail: qubj@ustc.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.50373039) and the National Key Basic Research Special Foundation Project of China(No.2001CB409600).

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摘要：

Polypropylene(PP)/MgAl layered double hydroxide(MgAl LDH) nanocomposites were synthesized by refluxing PP and dodecyl sulfate-intercalated MgAl LDH[MgAl(DS)] in non-polar xylene. Their structure, thermal and crystallization properties were studied via X-ray diffraction(XRD), transmission electron microscopy(TEM), thermogravimetric analysis(TGA), differential scanning calorimetry(DSC), and polarized light microscopy(PLM). The nanoscaled dispersion of MgAl(DS) nanolayeres in the PP matrix was verified by the disappearance of the d(003) XRD diffraction peak of MgAl(DS) and observation of TEM image. The DSC data show that the SDS/LDH inorganic components negatively affect the crystallization properties of PP and decrease the size of PP spherulites because the inorganic components act as additional nuclei. The PP/MgAl LDH nanocomposites have a faster charring progress in a temperature range of 250―430 °C and a better thermal stability above 320 °C than pure PP.

关键词: Layered doubled hydroxide; Polypropylene; Nanocomposite; Thermal property; Crystallization behavior

Abstract:

Polypropylene(PP)/MgAl layered double hydroxide(MgAl LDH) nanocomposites were synthesized by refluxing PP and dodecyl sulfate-intercalated MgAl LDH[MgAl(DS)] in non-polar xylene. Their structure, thermal and crystallization properties were studied via X-ray diffraction(XRD), transmission electron microscopy(TEM), thermogravimetric analysis(TGA), differential scanning calorimetry(DSC), and polarized light microscopy(PLM). The nanoscaled dispersion of MgAl(DS) nanolayeres in the PP matrix was verified by the disappearance of the d(003) XRD diffraction peak of MgAl(DS) and observation of TEM image. The DSC data show that the SDS/LDH inorganic components negatively affect the crystallization properties of PP and decrease the size of PP spherulites because the inorganic components act as additional nuclei. The PP/MgAl LDH nanocomposites have a faster charring progress in a temperature range of 250―430 °C and a better thermal stability above 320 °C than pure PP.

Key words: Layered doubled hydroxide; Polypropylene; Nanocomposite; Thermal property; Crystallization behavior