论文总字数：19222字

摘 要

本文通过控制材料摩擦性能测试时的载荷和转速，改变对偶件相对硬度，在室温空气环境下进行环-环接触式干摩擦试验,主要考察对偶件相对硬度的改变对聚酰亚胺材料摩擦性能的影响。同时利用扫描电子显微镜观察对偶件和材料表面摩擦磨损形貌以及分析摩擦磨损机理。

结果表明，随着对偶件相对硬度的增加,材料的摩擦系数呈现先减小后增大的趋势，材料摩擦系数最低时相对对偶件硬度为30HRC左右，而材料的磨损率变化幅度不大。控制载荷不变，材料摩擦系数最低时所对应的对偶件相对硬度随转速的提高而略有降低；控制转速不变，材料摩擦系数最低时所对应的对偶件相对硬度随载荷的提高而略有升高。

关键词：聚酰亚胺；对偶件；摩擦磨损性能

The study of the friction and wear properties of the polyimide by copolymerization modification

Abstract

The paper was mainly to explore the friction performance of polyimide materials by changing the metal pairs’ relative hardness surrounded the room temperature air environment, keeping the load and speed when testing friction performance of the materials. At the same time, the wear surface morphology of metal pairs and materials were observed by the scanning electron microscope accompanying the wear mechanism’ analysis.

The results showed that with the increasing of metal pairs’ relative hardness, the friction coefficient of the material firstly decreased and then increased. The materials showed the lowest friction coefficient when the relative hardness of metal pair was about 30HRC, while the material’ wear rate had no obvious change. Control load constantly, the lowest friction coefficient of corresponding metal pair’ relative hardness as the speed increased it decreased slightly; control speed constantly, the lowest friction coefficient of corresponding metal pair’ relative hardness as load increased it decreased.

Key Words: Polyimide; Copolymerization; Friction and wear properties; Modification

目 录

摘 要 I

Abstract II

目 录 III

第一章 文献综述 1

1.1 聚酰亚胺 1

1.2 聚酰亚胺的合成方法 1

1.3 聚酰亚胺的性能特点 2

1.4 聚酰亚胺的应用 3

1.5 摩擦学 5

1.6 聚酰亚胺摩擦改性 6

1.7 对偶件对聚酰亚胺摩擦磨损的影响 7

1.8 本文研究的意义.................................................................................................................8

第二章 实验部分 9

2.1 引言 9

2.2 实验部分 10

2.2.1 实验原料及试剂 10

2.2.2 实验仪器 10

2.2.3 实验步骤 10

2.2.4 性能表征 11

2.2.4.1红外表征..........................................................................................................11

2.2.4.2摩擦磨损测定..................................................................................................11

2.2.4.3电镜分析..........................................................................................................11

2.2.4.4 力学性能.........................................................................................................11

第三章 实验结果与讨论 12

3.1 PI膜的红外表征 12

3.2 聚酰亚胺摩擦性能 12

3.3 薄膜结构形貌的测定 15

3.4 PI摩擦面形貌表征............................................................................................................17

结 论 . 19

参考文献..........................................................................................................................................20

致 谢 22

第一章 文献综述

1.1 聚酰亚胺

聚酰亚胺，即PI，是芳香二胺与芳香族二酐缩聚而成的环链聚合物。它是是一种比较新型的耐高温材料^[1]，它可以耐400℃以上的高温，可长期使用温度范围在200-300℃之间，无明显熔点，具有高绝缘性能^[2]。其结构式如图1-1。

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