WAITING TIME EFFECT IN POLYBUTADIEN | Zendy

ZHU KE-JIA | Zendy; QIN XIAO-KUI | Zendy; Chen Hong | Zendy; Wu Xiang | Zendy

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WAITING TIME EFFECT IN POLYBUTADIEN

Author(s) -

ZHU KE-JIA,

QIN XIAO-KUI,

Chen Hong,

Wu Xiang

Publication year - 1993

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.42.1612

Subject(s) - materials science , specific heat , thermodynamics , slow cooling , process (computing) , glass transition , physics , composite material , computer science , polymer , operating system

The specific heat of polybutadien was measured and it was found that at temperature Tg = 178K there is a glass transition and the specific heat near the transition temperature depends strongly on the cooling process of the sample. After waiting at temperature Tw for a time tw during the cooling process, we found that there are waiting time effects on the specific heat of a heating process: the anomalous Δcp at Tp increases with the waiting time tw. In thecase of Tw=169K, Δcp(tw) can be described by Kohlrausch law Δcp(tw){l-exp[-(tw/τ)β]} with β =0.47±0.03.

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