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Volumn 131, Issue 2, 2009, Pages

Physical aging in glassy o -terphenyl monitored by probe rotation

Author keywords

[No Author keywords available]

Indexed keywords

AGING DYNAMICS; ANISOTROPY DECAY; MOLECULE ROTATION; O-TERPHENYL; PHYSICAL AGING; PROBE MOLECULES; ROTATION RATE; TEMPERATURE RANGE;

EID: 67650740002     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3169456     Document Type: Article
Times cited : (1)

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    • The structural relaxation time is often identified with the correlation time of molecule dipole moment. The anisotropy decay technique measures the times of the correlation function of molecule polarizability tensor. In the case of rotational diffusion, the correlation between tensor values is lost three times faster than that between the vector values, i.e., dif =1/3 (Ref.). When a molecule performs rotational jumps through fixed angles of the order of π /2 radians and more, then ho=1 (Ref.). The experimental value =0.45 is between dif and hoand therefore is reasonable.
    • The structural relaxation time is often identified with the correlation time of molecule dipole moment. The anisotropy decay technique measures the times of the correlation function of molecule polarizability tensor. In the case of rotational diffusion, the correlation between tensor values is lost three times faster than that between the vector values, i.e., dif =1/3 (Ref.). When a molecule performs rotational jumps through fixed angles of the order of π /2 radians and more, then hop =1 (Ref.). The experimental value =0.45 is between dif and hop and therefore is reasonable.
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    • The results reported in Refs. were interpreted using homogeneous aging model.
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