title: Calorimetric study of glass transition in molecular liquids consisting of globular associates: dicyclorohexylmethanol and tricyclohexylmethanol.
abstract: Heat capacities of liquids and liquid-quenched glasses (LQGs) of dicyclorohexylmethanol (DCHM) and tricyclohexylmethanol (TCHM) were measured by adiabatic calorimetry. Upon cooling the liquid compounds, they undergo glass transitions around 250 and 265 K, respectively. Temperature dependence of the FT-IR spectrum of TCHM liquid showed the gradual formation of dimers in the supercooled state with decreasing temperature. The magnitude of heat capacity jump at glass transition is discussed through a comparison with other low-molecular mass LQG. Combining the present results with previous heat capacity results on crystalline TCHM, residual entropies of LQG and standard thermodynamic quantities are established for both compounds.
authors.affiliation: Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Yamamura
authors.forename: Yu-ta
authors.initials: YT
authors.lastname: Suzuki
authors.forename: Masato
authors.initials: M
authors.lastname: Sumita
authors.forename: Kazuya
authors.initials: K
authors.lastname: Saito
mesh_terms: D001559:Benzhydryl Compounds / Q000737:chemistry*; D001592:Benzyl Alcohols / Q000737:chemistry*; D002151:Calorimetry; D005898:Glass / Q000737:chemistry*; D006860:Hydrogen Bonding; D000432:Methanol / Q000031:analogs & derivatives* / Q000737:chemistry*; D015394:Molecular Structure; D013816:Thermodynamics; D014320:Triphenylmethyl Compounds / Q000737:chemistry*
chemical_list: D001559:Benzhydryl Compounds; D001592:Benzyl Alcohols; D014320:Triphenylmethyl Compounds; C020225:benzohydrol; D000432:Methanol