On the relationships between guest molecular dynamics and free volume in a series of small molecular and polymer glass-formers

被引：14
作者：
Svajdlenkova, H. [1 ]
Sausa, O. [2 ]
Iskrova-Miklosovicova, M. [2 ]
Majernik, V. [2 ]
Kristiak, J. [2 ]
Bartos, J. [1 ]
机构：
[1] SAS, Inst Polymer, Bratislava 84541 45, Slovakia
[2] SAS, Inst Phys, Bratislava 84541 45, Slovakia
来源：
CHEMICAL PHYSICS LETTERS | 2012年 / 539卷
关键词：
SPIN-PROBE DYNAMICS; POSITRONIUM ANNIHILATION; TEMPERATURE-DEPENDENCE; RELAXATION DYNAMICS; LIFETIME; REORIENTATION; SPECTROSCOPY; TRANSITION; MOBILITY; MOTION;
D O I：
10.1016/j.cplett.2012.05.013
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The combined local dynamics and free volume investigations in a series of fourteen glass-formers by means of electron spin resonance (ESR) and positron annihilation lifetime spectroscopy (PALS) are presented. The reorientation of the spin probe TEMPO is related to the annihilation of the ortho-positronium (o-Ps). It was found that the slow to fast transition at T-50G is characterized by the almost constant o-Ps lifetime, tau(3)(T-50G) = 2.17 +/- 0.15 ns. Then, this transition is connected with the occurrence of the mean free volume hole fluctuation of V-h(T-50G) = 114 +/- 15 angstrom(3) nearly independent of the chemical and topological character of the matrix constituents as well as of the type and extent of intermolecular interactions. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：39 / 44
页数：6
相关论文
共 43 条
[1]   Jump reorientation of a molecular probe in the glass transition region of o-terphenyl [J].
Andreozzi, L ;
Cianflone, F ;
Donati, C ;
Leporini, D .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (21) :3795-3809
[2]   Jump rotation in a molecular glass former [J].
Andreozzi, L ;
Bagnoli, M ;
Faetti, M ;
Giordano, M .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 2002, 82 (04) :409-419
[3]   Free volume in poly(propylene glycol) and its relationships to spin probe reorientation [J].
Bartos, J. ;
Andreozzi, L. ;
Faetti, M. ;
Sausa, O. ;
Racko, D. ;
Kristiak, J. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2006, 352 (42-49) :4785-4789
[4]   Positron annihilation and relaxation dynamics from dielectric spectroscopy: poly(vinylmethylether) [J].
Bartos, J. ;
Iskrova-Miklosovicova, M. ;
Cangialosi, D. ;
Alegria, A. ;
Sausa, O. ;
Svajdlenkova, H. ;
Arbe, A. ;
Kristiak, J. ;
Colmenero, J. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2012, 24 (15)
[5]   Positron annihilation and relaxation dynamics from dielectric spectroscopy and nuclear magnetic resonance: Cis-trans-1,4-poly(butadiene) [J].
Bartos, J. ;
Sausa, O. ;
Schwartz, G. A. ;
Alegria, A. ;
Alberdi, J. M. ;
Arbe, A. ;
Kristiak, J. ;
Colmenero, J. .
JOURNAL OF CHEMICAL PHYSICS, 2011, 134 (16)
[6]   Positron annihilation and broadband dielectric spectroscopy: A series of propylene glycols [J].
Bartos, J. ;
Sausa, O. ;
Koehler, M. ;
Svajdlenkova, H. ;
Lunkenheimer, P. ;
Kristiak, J. ;
Loidl, A. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2011, 357 (02) :376-384
[7]   Free volume factor in supercooled liquid dynamics [J].
Bartos, J ;
Sausa, O ;
Bandzuch, P ;
Zrubcová, J ;
Kristiak, J .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2002, 307 :417-425
[8]   Positron annihilation response and broadband dielectric spectroscopy: Poly(propylene glycol) [J].
Bartos, J. ;
Schwartz, G. A. ;
Sausa, O. ;
Alegria, A. ;
Kristiak, J. ;
Colmenero, J. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2010, 356 (11-17) :782-786
[9]   Positron annihilation response and broadband dielectric spectroscopy: Propylene carbonate [J].
Bartos, J. ;
Majernik, V. ;
Iskrova, M. ;
Sausa, O. ;
Kristiak, J. ;
Lunkenheimer, P. ;
Loidl, A. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2010, 356 (11-17) :794-799
[10]   FREE-VOLUME STRUCTURE AND SPIN-PROBE DYNAMICS IN SOLID POLYMERS [J].
BARTOS, J ;
HLOUSKOVA, Z .
POLYMER, 1993, 34 (21) :4570-4572
12345