Glassy State and Glass Transition-Its Elucidation and New Applications. II. Determination of Glass Transition Temperature by Differential Scanning Calorimetry.

Dual Mesomorphic Assemblage of Chitin Normal Acylates and Rapid Enthalpy Relaxation of Their Side Chains

“…However, this evaluation is severely affected by kinetic effects. To minimize the contribution of such factors, we adopted a method proposed by Richardson et al , For this purpose, the ordinary DSC output data of heat flow, shown in Figure a, was converted into the corresponding relative enthalpy H , and a plot of H versus temperature was constructed. Subsequently, two tangential lines were drawn on both sides of the glass transition region in the H versus temperature curve, and the temperature value observed at the point of intersection was denoted as T g .…”

Thermal Transition Behavior of Liquid-Crystalline Cholesterol Derivative/Aliphatic Amine Complexes and Enthalpy Relaxation Characteristics in Their Glassy State

“…の モ ノ 錯 体 (CHP / C n -amine な ら び に CHS/ C n -amine， (2nd heating) 測定を行った．なお，各試料の T g はエン タルピー変換法 (Richardson らの方法) 13), 14) により決定 した． DSC によるエンタルピー緩和測定は，既報 11) と同様 の手順で行った．まず 1st heating にて熱履歴を消去した ) and T M⇔I (mesophase-isotropic liquid transition temperature), respectively. Abbreviations: G, glass; M, mesophase; I, isotropic liquid; sm, smectic; ch, cholesteric.…”