کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1482135 991555 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal conductivity of glassy primary mono-hydroxylalcohols
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Thermal conductivity of glassy primary mono-hydroxylalcohols
چکیده انگلیسی
Thermal conductivity κ(T) data for homologous series of primary mono-hydric alcohols - methanol, ethanol, 1-propanol, 1-butanol - within their molecular glass states are analyzed within the temperature region stretching from 2 K up to the glass transition Tg. Below 7 K κ(T) increases with the number of carbon atoms in the molecule. Furthermore, its temperature dependence exhibits a behavior akin to that predicted by the phenomenological model of soft potentials (SPM). The data are then rationalized in terms of the SPM parameters such as characteristic energy W and the parameter ¯С which measures the strength of the coupling of acoustic modes with two-level systems. The dependence of such parameters upon the molecular mass of the alcohol seems to agree with the SPM predictions. The parameters ¯С and W were used to calculate the boson peak energies. The values obtained agree well with literature data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 357, Issue 2, 15 January 2011, Pages 483-486
نویسندگان
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