Hongbin Lu, Steven Nutt, Macromol. Chem. Phys. 2003, 204: 1832-1841
玻璃化转变的热力学- 玻璃化转变的热力学-动力学相关性
(C. A. Angell et al, Nature, 2001, 410, 663-667)
玻璃化转变的构象熵模拟
∆C p = CT2 / T
τ = τ 0 exp{
B } T [1 − (T2 / T f )]
Results
High surface area + Good interface adhesion Lower configurational entropy Slower segmental motion Good stability and mechanical properties
Brian C. Sales, Science, 2002, 295, 1248
有机热电材料
基本原理、 基本原理、性能参数
Seebeck 效应 效应:温差产生电流 Peltier 效应 效应: 电场导致冷却 热电性能表征 热电优值 ZT = S2σT/κ κ
S - Seebeck 系数;σ - 电导率;κ - 热导率。 σ κ
CTE Flexible chain
High
Topological Structure Adjustment
Semi-Stiff chain
No polymer network No particle network Polymer network + Interpenetrating polymer local particle network and particle networks