热导率
瞬态(计算机编程)
材料科学
复合材料
聚乙烯
炭黑
平面(几何)
热的
电导率
热力学
化学
物理
几何学
数学
物理化学
天然橡胶
计算机科学
操作系统
作者
Ovidio Almanza,Miguel Ángel Rodríguez‐Pérez,J.A. de Saja
摘要
Abstract The thermal conductivity at constant pressure of a collection of crosslinked, closed‐cell polyethylene foams were measured at room temperature with the transient plane source (TPS) method. The experimental results were compared with those determined by a standard steady‐state technique. The results showed that the values measured by the TPS method follow the same trends as those measured by a heat‐flow meter. Therefore, with the TPS technique it is possible to observe the influence of structural characteristics such as cell size, black carbon content in foams, density, and so forth on thermal conductivity. However, the values obtained by the transient method were approximately 20% higher than those given by the standard method. Possible reasons for these variations are discussed. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 1226–1234, 2004
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