Volumetric Properties of a Binary Mixture Composed of N,N‑Dimethylcyclohexylamine and Alcohols

• Published in: Journal of chemical and engineering data 2020-04, Vol.65 (4), p.1547-1553
• Main Authors: Zhao, Dan, Zhuang, Yun, Fan, Chunshan, Zhang, Xihui, Yang, Fang, Chen, Yuhuan
• Format: Article
• Language: English
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/acs.jced.9b00979

The densities of six binary systems containing N,N-dimethylcyclohexylamine (DMCA) and ethanol, n-propanol, iso-propanol, n-butanol, iso-butanol, or tert-butanol were reported in this work at temperatures ranging from (288.15 to 318.15) K and atmospheric pressure. According to the experimental density values, molar volume (V m), thermal expansion coefficient (α p ), and excess molar volume (V m E) were calculated. The results showed that V m E values were all negative over the entire composition. The minimum values of the six systems at 298.15 K were located at (−1.097, −1.094, −0.900, −1.033, −1.154, and −1.073) cm3·mol–1 at about x DMCA = 0.4, respectively. All these are dependent on intermolecular interactions and the steric structural effect. Furthermore, V m E variations with composition (x DMCA) as well as temperature were well fitted with the Redlich–Kister-type polynomial equation.