中国物理B ›› 2012, Vol. 21 ›› Issue (8): 86402-086402.doi: 10.1088/1674-1056/21/8/086402

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Liquid to glass transition of tetrahydrofuran and 2-methyltetrahydrofuran

谈荣日a b c, 沈鑫a c, 胡林b, 张丰收a c d   

  1. a The Key Laboratory of Beam Technology and Material Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
    b Guizhou Key Laboratory for Photoelectric and Application, College of Science, Guizhou University, Guiyang 550025, China;
    c Beijing Radiation Center, Beijing 100875, China;
    d Center of Theoretical Nuclear Physics, National Laboratory of the Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China
  • 收稿日期:2012-03-08 修回日期:2012-05-26 出版日期:2012-07-01 发布日期:2012-07-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11025524 and 11161130520) and the National Basic Research Program of China (Grant No. 2010CB832903).

Liquid to glass transition of tetrahydrofuran and 2-methyltetrahydrofuran

Tan Rong-Ri (谈荣日)a b c, Shen Xin (沈鑫)a c, Hu Lin (胡林)b, Zhang Feng-Shou (张丰收 )a c d   

  1. a The Key Laboratory of Beam Technology and Material Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
    b Guizhou Key Laboratory for Photoelectric and Application, College of Science, Guizhou University, Guiyang 550025, China;
    c Beijing Radiation Center, Beijing 100875, China;
    d Center of Theoretical Nuclear Physics, National Laboratory of the Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China
  • Received:2012-03-08 Revised:2012-05-26 Online:2012-07-01 Published:2012-07-01
  • Contact: Zhang Feng-Shou E-mail:fszhang@bnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11025524 and 11161130520) and the National Basic Research Program of China (Grant No. 2010CB832903).

摘要: Both tetrahydrofuran (THF) and 2-methyltetrahydrofuran (MTHF) are studied systematically at desired temperatures using molecular dynamics simulations. The results show that the calculated densities are well consistent with experiment. Their glass transition temperatures are obtained: 115 K ~130 K for THF and 131 K ~142 K for MTHF. The calculated results from the dipolar orientational time correlation functions indicate that the “long time” behavior is often associated with a glass transition. From the radial and spatial distributions, we also find that the methyl has a direct impact on the structural symmetry of molecules, which leads to the differences of physical properties between THF and MTHF.

关键词: tetrahydrofuran and 2-methyltetrahydrofuran, glass transition, molecular dynamics simulations

Abstract: Both tetrahydrofuran (THF) and 2-methyltetrahydrofuran (MTHF) are studied systematically at desired temperatures using molecular dynamics simulations. The results show that the calculated densities are well consistent with experiment. Their glass transition temperatures are obtained: 115 K ~130 K for THF and 131 K ~142 K for MTHF. The calculated results from the dipolar orientational time correlation functions indicate that the “long time” behavior is often associated with a glass transition. From the radial and spatial distributions, we also find that the methyl has a direct impact on the structural symmetry of molecules, which leads to the differences of physical properties between THF and MTHF.

Key words: tetrahydrofuran and 2-methyltetrahydrofuran, glass transition, molecular dynamics simulations

中图分类号:  (Glass transitions of specific systems)

  • 64.70.P-
65.20.Jk (Studies of thermodynamic properties of specific liquids) 71.15.Pd (Molecular dynamics calculations (Car-Parrinello) and other numerical simulations)