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On theC v toC p conversion for solid linear macromolecules

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Abstract

TheC v toC p conversion for solid linear macromolecules via the Nernst-Lindemann equationC p -C v =A 0,C 2p T/Tm is discussed on hand of data for 10 crystals and seven glasses. An average value ofA 0=(5.11±2.41) · 10−3 mol K J−1 was calculated if the mole is assumed to refer to heavy atoms only. ThisA 0 is numerically equal to the original Nernst—Lindemann constant.

Zusammenfassung

An Hand von sich auf 10 Kristalle und 7 Gläser beziehenden Daten wird die Umrechnung vonC v -inC p -Werte für feste lineare Makromoleküle mittels der Nernst-Lindemann-GleichungC p -C v =A 0 C 2 p T/T m diskutiert. Ein Durchschnittswert vonA 0=(5.11±2.41) · 10−3 mol K J−1 wurde unter der Annahme berechnet, daß sich das Mol nur auf schwere Atome bezieht. DieserA 0-Wert ist numerisch gleich der ursprünglichen Nerns-Lindemann-Konstanten.

Резюме

На основе имеющихся д анных для 10 кристаллов и нескольких стекол, об-суждено превращениеC v доC p , ис ходя из уравнения Нернста—ЛиндеманнаC p −C v = А0С 2p Т/Т т . Предполага я, что моль относится т олько к тяжелым атомам, было вычислено среднее зн ачениеА 0 равным (5.11±2.41) · 10−3 моль · Кдж−1. Это значе ниеА 0 численно равно пер воначальной констан те уравнения Нернста—Л индеманна.

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Authors and Affiliations

  1. Department of Chemistry, Rensselaer Polytechnic Institute, 12181, Troy, NY, USA

    J. Grebowicz & B. Wunderlich

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  1. J. Grebowicz
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  2. B. Wunderlich
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Support by the National Science Foundation, Polymers Program (Grant No. DMR 83-17097) is gratefully acknowledged.

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Grebowicz, J., Wunderlich, B. On theC v toC p conversion for solid linear macromolecules. Journal of Thermal Analysis 30, 229–236 (1985). https://doi.org/10.1007/BF02128133

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