Relaxation spectra and dipolar correlations for flexible polymers with bulky side groups

Journal Article · Thu Aug 06 00:00:00 EDT 1992 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100195a058· OSTI ID:468105

Diaz-Calleja, R ^[1]; Riande, E; Roman, J S ^[2]

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1. Universidad Politecnica de Valencia (Spain)
2. Instituto de Ciencia y Tecnologia de Polimeros (CSIC), Madrid (Spain)

This paper discusses how relaxation spectra and dipolar correlations for flexible polymers with bulky side groups (PBPA chains) suggest that intermolecular correlations are not very important in this polymer and that {alpha}, {beta}, and {gamma} absorptions exist. TSDC techniques reveal that the {gamma} peak has a smaller activation energy than the {beta}, and the coupling scheme is used to interpret the complex dielectric and mechanical {alpha} relaxations. The anomalous temperature dependence of the glass-rubber relaxation is discussed in terms of the bulkiness of the side group. 23 refs., 8 figs., 3 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 468105
• Journal Information: Journal of Physical Chemistry, Vol. 96, Issue 16; Other Information: PBD: 6 Aug 1992
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
36 MATERIALS SCIENCE
66 PHYSICS
POLYMERS
RELAXATION TIME
CORRELATIONS
DIELECTRIC PROPERTIES
ACRYLATES
BIPHENYL
TEMPERATURE DEPENDENCE