Correlations between boson peak strength and characteristics of local segmental relaxation in polymers

K. L. Ngai; A. Sokolov; W. Steffen

doi:10.1063/1.474889

Correlations between boson peak strength and characteristics of local segmental relaxation in polymers

K. L. Ngai, A. Sokolov, W. Steffen

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A correlation between the strength of the boson peak, R₁(T_g), and the "fragility" of glass-forming liquids proposed earlier is reanalyzed more exactly for polymers. New experimental data are included, making the correlation more evident for the family of polymers. An additional correlation between R₁(T_g) and the shape parameter β of the Kohlrausch correlation function of the α relaxation is shown to hold as well. With these results, the important connection of the boson peak to the glass transition dynamics has become more apparent.

Original language	English
Pages (from-to)	5268-5272
Number of pages	5
Journal	Journal of Chemical Physics
Volume	107
Issue number	13
DOIs	https://doi.org/10.1063/1.474889
State	Published - Oct 1 1997
Externally published	Yes

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AB - A correlation between the strength of the boson peak, R1(Tg), and the "fragility" of glass-forming liquids proposed earlier is reanalyzed more exactly for polymers. New experimental data are included, making the correlation more evident for the family of polymers. An additional correlation between R1(Tg) and the shape parameter β of the Kohlrausch correlation function of the α relaxation is shown to hold as well. With these results, the important connection of the boson peak to the glass transition dynamics has become more apparent.

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Correlations between boson peak strength and characteristics of local segmental relaxation in polymers

Abstract

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