Portnova, Svetlana V.; Kuzmina, Natalia S.; Yamshchikova, Yulia F.; Krasnykh, Eugene L. published the artcile< Density and Viscosity of Glycolic, Lactic, and Malic Acid Esters>, Quality Control of 623-50-7 , the main research area is density kinematic viscosity aliphatic ester glycolic lactic malic acid.
Densities and viscosities were measured as a function of temperature for 12 esters of glycolic, DL-lactic, and DL-malic acids and linear chain alcs. C1-C5. The d. and kinematic viscosity were obtained using a pycnometer and a Pinkevitch capillary viscometer in a temperature range of 293.15-363.15 K with accuracies of 0.1 and 0.35%, resp. The obtained data were used for dynamic viscosity calculation It was demonstrated that the viscosity-temperature dependence of esters was described by the ASTM D341 model with an average absolute relative deviation of 1%. The temperature dependence of dynamic viscosity was fitted using the Arrhenius-like equation and Vogel-Fulcher-Tammann (VFT) model. It was found that the adjustable parameters A and B have the similar value for compounds in one homologous series. These parameters were taken as constant for each series of esters of the corresponding acids. The dynamic viscosity-temperature dependence of esters was better described by the VFT model than the Arrhenius-like equation. The capabilities of some group-additivity methods for predicting d. have been reviewed and compared with exptl. results.
Journal of Chemical & Engineering Data published new progress about Aliphatic diesters Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation). 623-50-7 belongs to class esters-buliding-blocks, and the molecular formula is C4H8O3, Quality Control of 623-50-7 .
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics