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Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol
Tong, B.; Tan, Z.-C.; Lv, X. C.; Sun, L. X.; Xu, F.; Shi, Q.; Li, Y. S.
关键词Adiabatic Calorimetry Dsc 2 Heat Capacity 2-dimethyl-1 Phase Transition 3-propanediol Tg Thermodynamic Properties
刊名JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
2007-10-01
DOI10.1007/s10973-006-7672-5
90期:1页:217-221
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical ; Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]PHASE-TRANSITIONS
英文摘要The molar heat capacities C (p,m) of 2,2-dimethyl-1,3-propanediol were measured in the temperature range from 78 to 410 K by means of a small sample automated adiabatic calorimeter. A solid-solid and a solid-liquid phase transitions were found at T-314.304 and 402.402 K, respectively, from the experimental C (p)-T curve. The molar enthalpies and entropies of these transitions were determined to be 14.78 kJ mol(-1), 47.01 J K-1 mol(-1) for the solid-solid transition and 7.518 kJ mol(-1), 18.68 J K-1 mol(-1) for the solid-liquid transition, respectively. The dependence of heat capacity on the temperature was fitted to the following polynomial equations with least square method. In the temperature range of 80 to 310 K, C (p,m)/(J K-1 mol(-1))=117.72+58.8022x+3.0964x(2)+6.87363x (3)-13.922x(4)+9.8889x(5)+16.195x(6); x=[(T/K)-195]/115. In the temperature range of 325 to 395 K, C (p,m)/(J K-1 mol(-1))=290.74+22.767x-0.6247x 2-0.8716x 3-4.0159x 4-0.2878x 5+1.7244x 6; x=[(T/K)-360]/35. The thermodynamic functions H (T)-H (298.15) and S (T)-S (298.15), were derived from the heat capacity data in the temperature range of 80 to 410 K with an interval of 5 K. The thermostability of the compound was further tested by DSC and TG measurements. The results were in agreement with those obtained by adiabatic calorimetry.
语种英语
WOS记录号WOS:000249652300028
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被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140706
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China
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GB/T 7714
Tong, B.,Tan, Z.-C.,Lv, X. C.,et al. Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2007,90(1):217-221.
APA Tong, B..,Tan, Z.-C..,Lv, X. C..,Sun, L. X..,Xu, F..,...&Li, Y. S..(2007).Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,90(1),217-221.
MLA Tong, B.,et al."Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 90.1(2007):217-221.
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