二甲酸二脂系玻璃化转变的力学谱研究

MECHANICAL SPECTRUM INVESTIGATION OF GLASS TRANSITION IN 2-LIPIN-SERIES

本文用最近发明的液态低频力学谱方法对二甲酸二脂系列样品进行了测量,验证了该方法的可信性与有效性,并且表明它能够提供物质变化的丰富信息。研究结果还表明,随着分子内部自由度的增加、二甲酸二脂系列的玻璃化转变温度表现出先减小然后又增加、但脆性是先增加后减小的有趣又难以理解反常趋势。

The 2-formyl-2-lipin-series samples were measured by the liquid lowirequency mechanical spectrum （LLFMS） method recently invented, that ensures the its reliability and availability to investigate the physical variations of soft-condensed matters. The measured results also indicate that, with the increase of the internal freedom degrees of the molecules, the glass transition temperature of the 2-formyl-2-lipin-series shows an anomalous tendency first decreasing then increasing, but the fragility changes in a contrary way, which is interesting andquite difficultly understood.