Structural Relaxations and Thermodynamic Properties of Molecular Amorphous Solids by Mechanical Milling

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概要

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• The organic crystals of tri-O-methyl-β-cyclodextrin (TMCD) and its three clathrate compounds containing benzoic acid (BA), p-nitrobenzoic acid (NBA) and p-hydroxybenzoic acid (HBA), sucrose (SUC), salicin (SAL), phenolphthalein (PP), 1, 3, 5-tri-α-naphthylbenzene (TNB) were amorphized by milling with a vibrating mill for 2~16 hours at room temperature. The amorphization was checked by differential scanning calorimetry (DSC) and X-ray powder diffraction. The heat capacities of crystals, liquid quenched glasses (LQG), and mechanically-milled amorphous solid (MMAS) of TMCD and TNB were measured with an adiabatic calorimeter in the temperature range between 12 and 375 K. For both compounds, the enthalpy relaxation of MMAS appeared in the wide temperature range below T_g and the released configurational enthalpy was much larger than that of LQG, indicating that MMAS is more disordered and strained than LQG.

• 理論物理学刊行会の論文
• 1997-06-27

著者

• YAMAMURO Osamu

  Department of Chemistry, Graduate School of Science, Osaka University

• MATSUO Takasuke

  Department of Chemistry,Graduate School of Science,Osaka University

• Tsukushi I

  Chiba Inst. Of Technol. Chiba

• Tsukushi I

  Department Of Chemistry Graduate School Of Science Osaka University : Institute For Chemical Researc

• Tsukushi Itaru

  Department Of Chemistry Graduate School Of Science Osaka University

• Yamamuro Osamu

  Department Of Chemistry Graduate School Of Science Osaka University

• Yamamuro Osamu

  Department Of Chemistry And The Microcalorimetry Research Center Graduate School Of Science Osaka Un

• Matsuo Takasuke

  Department Of Chemistry Graduate School Of Science Osaka University

• Matsuo Takasuke

  Department Of Chemistry And The Microcalorimetry Research Center Graduate School Of Science Osaka Un

• Matsuo Takashi

  Department Of Biology Tokyo Metropolitan University

• MATSUO Takasuke

  Department of Chemistry, Graduate School of Science, Osaka University

• Matsuo Takasuke

  Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University

• Yamamuro Osamu

  Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University

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