Thermodynamic Properties of Polyphenylquinoxaline in the Temperature Range of T → 0 to 570 K

被引：1
|
作者：
Smirnova, N. N. [1 ]
Markin, A. V. [1 ]
Samosudova, Ya. S. [1 ]
Bykova, T. A. [1 ]
Shifrina, Z. B. [2 ]
Serkova, E. S. [2 ]
Kuchkina, N. V. [2 ]
机构：
[1] Lobachevsky Univ, Nizhnii Novgorod 603950, Russia
[2] Russian Acad Sci, Nesmeyanov Inst Organoelement Cpds, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2018年 / 92卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
polyphenylquinoxaline; adiabatic calorimetry; differential scanning calorimetry; heat capacity; thermodynamic functions; HEAT-CAPACITY; POLYMERS;
D O I：
10.1134/S0036024418020206
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The thermodynamic properties of amorphous polyphenylquinoxaline in the temperature range of 6 to 570 K are studied via precision adiabatic vacuum calorimetry and differential scanning calorimetry. The thermodynamic characteristics of glass transition are determined. Standard thermodynamic functions C (A degrees) (p), HA degrees(T) - HA degrees(0), SA degrees(D cent) - SA degrees(0), and GA degrees(T) - HA degrees(0) in the range of T -> 0 to 570 K and the standard entropy of formation at T = 298.15 K are calculated. The low-temperature (T ae<currency> 50 K) heat capacity is analyzed using a multifractal model for the processing of heat capacity, fractal dimension D values are determined, and conclusions on the topological structure of the compound are drawn.
引用
收藏
页码：226 / 231
页数：6
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