ABSTRACT

This work aims to provide reliable heat capacities for ethylene glycol and selected oligo(ethylene glycol)s (diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol and hexaethylene glycol), industrially important chemicals produced on a large scale. Besides, new data extend the database needed for better understanding of complex behavior of compounds capable of forming hydrogen bonds. Isobaric heat capacities of ethylene glycols were measured with a Tian-Calvet type calorimeter in the temperature range from 260 K to 358 K. The phase behavior was investigated with a heat-flux differential scanning calorimeter. A simple additive estimation method for liquid heat capacity of oligo(ethylene glycol)s was developed and tested through comparison with newly measured liquid heat capacities of polyethylene glycols 400 and

Compounds

#	Formula	Name
1	C2H6O2	1,2-ethanediol
2	C4H10O3	diethylene glycol
3	C6H14O4	triethylene glycol
4	C8H18O5	tetraethylene glycol
5	C10H22O6	3,6,9,12-tetraoxatetradecane-1,14-diol
6	C12H26O7	3,6,9,12,15-pentaoxaheptadecane-1,17-diol

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Triple point temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Extra sensitive DSC	40
POMD	2	Triple point temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Metastable liquid	Temperature, K; Metastable liquid	Pressure, kPa; Metastable liquid	Metastable liquid	Extra sensitive DSC	42
POMD	3	Triple point temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Metastable liquid	Temperature, K; Metastable liquid	Pressure, kPa; Metastable liquid	Metastable liquid	Extra sensitive DSC	38
POMD	4	Triple point temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Metastable liquid	Temperature, K; Metastable liquid	Pressure, kPa; Metastable liquid	Metastable liquid	Extra sensitive DSC	42
POMD	5	Triple point temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	5	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Metastable liquid	Temperature, K; Metastable liquid	Pressure, kPa; Metastable liquid	Metastable liquid	Extra sensitive DSC	42
POMD	6	Triple point temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	6	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Extra sensitive DSC	29

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Heat Capacity and Phase Behavior of Selected Oligo(ethylene glycol)s

Pokorn, V.[Vclav], Serra, P. B. P.[Paulo B. P.], Fulem, M.[Michal], Lima, C. F. R. A. C.[Carlos F. R. A. C.], Santos, L. M. N. B. F.[Luis M. N. B. F.], Rika, K.[Kvtoslav]

ABSTRACT