摘要发泡塑料作为新型的塑料，因为其独特的材料性质而得到人们的青睐，在生产生 活中的运用越来越广泛，人们对其的研究越发的深入，从发泡剂的研究，成型方法的 开发，以及材料性能的研究都说明了发泡塑料的市场前景广大。导热系数作为最重要 的热力学系数，在整个材料各种性能评估中占很重要的地位。本文从热力学角度出发， 通过对发泡塑料的导热系数的研究，来探究发泡塑料的导热系数和发泡程度以及是否 发泡有关。主要目的是在热力学的基础上，深入理解导热系数的测量方法。通过大量 的文献资料，分析了发泡塑料和导热系数的发展。本文中运用最基本的实验的方法来 测得导热系数。导热系数的测量主要是稳态和非稳态两种方式，通过控制实验变量来 形成对比实验，通过控制实验条件，来简化实验方法。最后将得出的实验数据进行评 估，并且比较两种试样方法的优缺点。80627

毕业论文关键词：导热系数；发泡塑料；微孔制品；稳态导热；非稳态导热；

Abstract As a new type of plastic, expanded plastic become more and more popular among industrial production and people’s life because of its unique material properties and get people's favor。 People do more and more deeply research on it。 From the researches on the foaming agent, the developments of the molding method, and studies of the material properties, it can be seen that expanded plastic has a huge market prospect。 As the most important thermodynamic coefficient, thermal conductivity plays an important role in the evaluation of the performance of the whole material。 In this paper, we explore the thermal conductivity of foamed plastics and the degree of foaming from the point of view of thermodynamics, through the study of the thermal conductivity of expanded plastic。 The main purpose is to understand the measurement method of thermal conductivity on the basis of thermodynamics。 In this paper, the use of the most basic experimental method to measure the thermal conductivity。 The measurement of thermal conductivity is mainly two ways of steady state and unsteady state。 A comparative experiment is formed by controlling the experimental variables。 By controlling the experimental conditions, the experimental method is simplified。 Finally, the experimental data are evaluated, and the advantages and disadvantages of the two methods are compared。

Keywords: Thermal conductivity; expanded plastics; micro porous products; steady state heat conduction; non steady state heat conduction;

目 录

第一章 绪论 1

1。1 微孔塑料的介绍 1

1。1。1 微孔塑料的优点 1

1。1。2 微孔塑料的应用 1

1。1。3 微孔塑料的国内外发展 2

1。2 发泡剂 2

1。2。1 国内外发泡剂概况 2

1。2。2 国内外最新发泡剂发展动向 3

1。3 导热系数 3

1。3。1 导热系数的重要性 3

1。3。2 导热系数的测量方法 5

1。4