Dielectric and dynamic mechanical behaviors of 1,2‐polybutadienes

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Abstract
The dielectric relaxation behavior of 1,2‐polybutadienes is analyzed in terms of the experimental data and master curves. The dielectric measurement data were fitted to the empirical relaxation time distribution model of Havriliak and Negami over a frequency range from 100 to 1012 Hz. The constants of the WLF equation, C1 and C2, were evaluated with Tg at 100 kHz as a reference temperature for some samples, and the master curve of a sample was constructed. The dynamic mechanical measurements for a series of 1,2‐polybutadienes with different chain structure were performed over a temperature range from −150 to 50°C. A qualitative comparison of the dielectric and dynamic mechanical behaviors of 1,2‐polybutadienes has been made.