کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9694266 | 1459644 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamics of phenylated polyphenylene in the range from T â 0 to 640Â K at standard pressure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
By dynamic calorimetry the temperature dependences of heat capacity of phenylated polyphenylene (PPPh) and 1,4-bis-(2,4,5-triphenylcyclopentadienone-3-yl)benzene (TPCPB) in the range 300-640 K at standard pressure have been determined within ±1.5%. The thermodynamic characteristics of fusion of TPCPB, namely temperature, enthalpy and entropy, as well as the parameters of glass transition and glassy state for PPPh such as temperature, zero entropy of glassy state, the difference in zero enthalpies of glassy and crystalline states have been estimated. The experimental data obtained in the present work and literature findings were used to calculate their thermodynamic functions: the heat capacity Cpo (T), enthalpy Ho(T)âHo(0), entropy So(T) and Gibbs function Go(T)âHo(0) over the range from T â 0 to 640 K. The thermodynamic characteristics of synthesis reaction of phenylated polyphenylene have been evaluated between 0 and 600 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 425, Issues 1â2, 20 January 2005, Pages 39-46
Journal: Thermochimica Acta - Volume 425, Issues 1â2, 20 January 2005, Pages 39-46
نویسندگان
N.N. Smirnova, T.G. Kulagina, A.V. Markin, Z.B. Shifrina, A.L. Rusanov,