caa a22 4500 463189566 CHVBK 20180406164904.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10973-006-7672-5 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7672-5 Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol [Elektronische Daten] [B. Tong, Z. Tan, X. Lv, L. Sun, F. Xu, Q. Shi, Y. Li] 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− 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. Springer Science+Business Media, LLC., 2007 adiabatic calorimetry nationallicence 2,2-dimethyl-1,3-propanediol nationallicence DSC nationallicence heat capacity nationallicence phase transition nationallicence TG nationallicence thermodynamic properties nationallicence Tong B. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut Tan Z. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut Lv X. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut Sun L. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut Xu F. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut Shi Q. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut Li Y. College of Environmental Science and Engineering, Dalian Jiaotong University, 116028, Dalian, China aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 217-221 1388-6150 90:1<217 2007 90 10973 https://doi.org/10.1007/s10973-006-7672-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7672-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tong B. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut NATIONALLICENCE 700 1- Tan Z. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut NATIONALLICENCE 700 1- Lv X. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut NATIONALLICENCE 700 1- Sun L. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut NATIONALLICENCE 700 1- Xu F. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut NATIONALLICENCE 700 1- Shi Q. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023, Dalian, China aut NATIONALLICENCE 700 1- Li Y. College of Environmental Science and Engineering, Dalian Jiaotong University, 116028, Dalian, China aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 217-221 1388-6150 90:1<217 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer