Characteristic length of glass transition from calorimetry for benzoin isobutylether in a series of nanometer pores

被引:25
作者
Hempel, E
Huwe, A
Otto, K
Janowski, F
Schröter, K
Donth, E [1 ]
机构
[1] Univ Halle, Fachbereich Phys, D-06099 Halle, Germany
[2] Univ Leipzig, Fac Phys, D-04103 Leipzig, Germany
[3] Univ Halle, Fachbereich Chem, D-06099 Halle Salle, Germany
关键词
glass transition; calorimetry;
D O I
10.1016/S0040-6031(99)00168-9
中图分类号
O414.1 [热力学];
学科分类号
摘要
Temperature modulated dynamic scanning calorimetry (TMDSC) yields the characteristic length or, correspondingly, the cooperativity of dynamic glass transition of a molecular liquid in nanometer size pores. The TMDSC traces for benzoin isobutylether are not disturbed by structuring effects that are usually observed in standard DSC. The bulk length of about xi(alpha) = 3 nm decreases with decreasing pore diameter below D = 12 nm, down to xi(alpha) = 1.6 nm in D = 2 nm pores. The glass transition temperature decreases concomitantly. This can be understood in the framework of the hindered glass transition. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:163 / 168
页数:6
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