The apparent activation energy for mechanical and dielectric relaxation in glass-forming (polymeric) liquids: A misconception?

被引：8
|
作者：
Struik, LCE
机构：
[1] DSM Research, 6160 MD, Geleen
来源：
POLYMER | 1997年 / 38卷 / 03期
关键词：
activation energy; apparent activation energy; glass transition; secondary transition; WLF equation;
D O I：
10.1016/S0032-3861(96)00699-4
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
It is shown that the well-known concept of an apparent activation energy (Q(app)) is confusing. Much of the problem with the application of thermal activation theory to glass transition disappears when the concept is abandoned and replaced by a strict application of the Arrhenius formula with temperature dependentactivation energy, Q not equal Q(app). (C) 1997 Elsevier Science Ltd.
引用
收藏
页码：733 / 735
页数：3
相关论文
共 50 条
  • [1] Dielectric and mechanical relaxation of glass-forming liquids in nanopores
    Wendt, H
    Richert, R
    DYNAMICS IN SMALL CONFINING SYSTEMS IV, 1999, 543 : 15 - 26
  • [2] RELAXATION IN GLASS-FORMING LIQUIDS
    UHLMANN, DR
    AMERICAN CERAMIC SOCIETY BULLETIN, 1979, 58 (03): : 384 - 384
  • [3] Relaxation Dynamics in the Energy Landscape of Glass-Forming Liquids
    Nishikawa, Yoshihiko
    Ozawa, Misaki
    Ikeda, Atsushi
    Chaudhuri, Pinaki
    Berthier, Ludovic
    PHYSICAL REVIEW X, 2022, 12 (02)
  • [4] COOPERATIVE PROCESSES OF DIELECTRIC-RELAXATION IN GLASS-FORMING LIQUIDS
    STETSOVSKII, AP
    ZHURAVLEVA, LA
    SANATULIN, VS
    SOROKIN, GA
    ZHURNAL FIZICHESKOI KHIMII, 1981, 55 (01): : 12 - 15
  • [5] ON VISCOSITY OF GLASS-FORMING POLYMERIC LIQUIDS
    ELLERSTE.SM
    JOURNAL OF POLYMER SCIENCE PART B-POLYMER LETTERS, 1963, 1 (07): : 369 - &
  • [6] COMPLETELY NONPOLAR SOLVATION AS A PROBE OF MECHANICAL RELAXATION IN GLASS-FORMING LIQUIDS
    FOURKAS, JT
    BENIGNO, A
    BERG, M
    JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 172 : 234 - 240
  • [7] Study of the alpha-mechanical relaxation in molecular glass-forming liquids
    Faivre, A
    David, L
    Perez, J
    JOURNAL DE PHYSIQUE II, 1997, 7 (11): : 1635 - 1650
  • [8] Cooperative relaxation in glass-forming liquids.
    Mohanty, U
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2000, 220 : U172 - U172
  • [9] Relaxation and diffusion in glass-forming metallic liquids
    Meyer, A
    Roth, S
    Petry, W
    DIFFUSIONS IN MATERIALS: DIMAT2000, PTS 1 & 2, 2001, 194-1 : 891 - 894
  • [10] Dielectric Spectroscopy Studies of Conformational Relaxation Dynamics in Molecular Glass-Forming Liquids
    Romanini, Michela
    Macovez, Roberto
    Valenti, Sofia
    Noor, Wahi
    Tamarit, Josep Lluis
    INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2023, 24 (24)
12345