构型熵与弛豫函数相关性的研究

A study on the relationship between configurational entropy and stretched exponential function

运用Adam Gibbs的构型熵理论探讨了玻璃化液体的输运性质和热力学性质之间的相互关系,提出在非指数型弛豫函数中展宽因子等于构型重排区域的相对构型熵;与构型重排区域内的临界分子数成反比.由此赋予了展宽因子在玻璃构型方面新的物理意义,建立了结构弛豫与构型熵之间的联系,从而为探讨粘滞性、非理想弛豫、构型熵和液体分子的结构之间的关联性扩展了新的研究空间.

The relationship between the transport properties and thermodynamic properties in glass forming liquids is investigated with the configurational entropy of AdamGibbs theory on cooperatively rearranging regions.A brief is proposed that nonexponential stretched exponent in KWW form relaxation function is equal to the relative configurational entropy of cooperatively rearranging region, and is inversely proportional to the critical number of molecules occurring configurational transformation in a cooperatively rearranging region.Therefore, the new physical significance on glassy configuration is imposed on the stretched exponent,and theoretical developments and empirical correlations are established between structural relaxation and configurational entropy, which enlarges new space for researching viscosity,configurational entropy,nonideal relaxation,the structure of liquid molecule,as well as their relationships.