邻苯二甲酸二甲酯系材料的液态簧振动力学谱测量

Measurements of dimethyl phthalate series by the reed-vibration mechanical spectroscopy for liquids

用液态簧振动力学谱方法对邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯和邻苯二甲酸二辛酯的系列样品进行了测量.在升温过程中所测温区范围内,结果表明邻苯二甲酸二甲酯样品相继发生了动力学玻璃化转变、过冷液态的结晶、晶体—液态相变和挥发过程,而在邻苯二甲酸二乙酯、邻苯二甲酸二丁酯和邻苯二甲酸二辛酯样品中仅仅发生了动力学玻璃化转变和挥发过程.上述实验结果与分析表明,液态簧振动力学谱方法是研究拥有液态过程的可靠和有效的方法,并且能够提供物质变化的丰富信息.

Dimethyl phthalate,diethyl phthalate,dibutyl phthalate,and dioctyl phthalate series samples were measured by the reed-vibration mechanical spectroscopy for liquids recently invented.The results indicate that the processes of dynamical glass transition,crystallization of the supercooled liquid,crystal-liquid phase transition,and gasification take place successively for the dimethyl phthalate sample in the measured temperature range on heating,but only the glass transition and the gasification appear in the other 3 samples.The above measurements and corresponding analysis show that the reed-vibration mechanical spectroscopy for liquids is a reliable and effective method for the investigation of physical processes in liquid state,so that it could provide physical information of soft condensed matter.