Doss Karan, Mauro John C
Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, PA 16802, United States of America.
J Phys Condens Matter. 2022 Sep 12;34(45). doi: 10.1088/1361-648X/ac8e46.
The presence of large scatter in linear response data has cast doubt on the existence of an inverse correlation between liquid fragility and nonexponentiality, as originally proposed by Böhmer(19934201). We present a model for the temperature dependence of the stretching exponent based on the Mauro-Yue-Ellison-Gupta-Allan model for supercooled liquid viscosity and discuss the factors impacting the relationship between fragility and the stretching exponent at the glass transition. The proposed model exhibits distinct advantages over previous models in terms of interpretability and limit behaviors for the temperature dependence.
线性响应数据中存在的较大离散性，对最初由博默（1993年）提出的液体脆性与非指数性之间存在负相关的观点提出了质疑。我们基于毛罗 - 岳 - 埃里森 - 古普塔 - 艾伦过冷液体粘度模型，提出了一个关于拉伸指数温度依赖性的模型，并讨论了在玻璃化转变时影响脆性与拉伸指数之间关系的因素。所提出的模型在温度依赖性的可解释性和极限行为方面比以前的模型具有明显优势。
