联苯聚醚醚酮酮及其碳纤维增强复合材料的制备和摩擦性能研究
发布时间：2018-11-28 16:04
【摘要】：聚芳醚酮高性能聚合物材料具有轻质高强度、耐高温及良好的自润滑性等特点，广泛应用于高分子摩擦材料及制品领域，，如密封件，轴承，齿轮，传送带和人造关节等。利用复合改性技术进一步改善其摩擦磨损性能的研究也日益广泛，主要集中在通过在树脂中添加增强填料及固体润滑剂等组分，利用这些组分的协同作用来改善聚合物材料的摩擦性能，这方面的研究已经取得了重要进展并成功获得应用。但是，单用复合改性的方式来提高材料的摩擦性能，已无法满足越来越高的应用需求，而且如果一味地寻求填料增强，随着填料的增多，材料力、热等性能也将受到严重影响。因此，近些年来，通过分子设计等方式改善树脂基体本身的摩擦性能，再结合复合改性技术对材料进行增强，成为提升聚合物材料摩擦性能的一种重要手段。 本文选择了以联苯聚醚醚酮酮共聚物为研究主体，通过改变主链中联苯结构单元的比例，来研究分子结构的改变对树脂的摩擦性能的影响以及使摩擦性能变化的原因。从实验结果来看，联苯单元的引入整体上有利于树脂摩擦系数的降低，并且在联苯单元含量对摩擦系数影响方面存在最优值。通过对该系列共聚物性能的测试以及对摩擦机理的深入探究，在共聚物分子结构，结晶度和树脂摩擦性能之间建立起了一定联系。以此系列共聚物中摩擦系数较低的纯树脂作为基体，通过与碳纤维复合的方式，得到了一种既具有低摩擦系数，又具备良好的耐磨损性能的自润滑复合材料，并开展了复合材料的热性能和机械性能等的评价和研究工作。
[Abstract]:Poly (aryl ether ketone) high performance polymer materials have been widely used in high molecular friction materials and products such as seals bearings gears conveyor belts and artificial joints due to their advantages of light weight high strength high temperature resistance and good self-lubricating properties. The use of composite modification technology to further improve their friction and wear properties is also increasingly widespread, mainly through the addition of resin filler and solid lubricants and other components, Using the synergistic effect of these components to improve the tribological properties of polymer materials, important progress has been made in this field and has been successfully applied. However, it is not possible to improve the friction performance of the material by using compound modification alone, and if the filler is strengthened blindly, the properties of the material such as force and heat will be seriously affected with the increase of the filler. Therefore, in recent years, it has become an important means to improve the friction properties of polymer materials by means of molecular design and other ways to improve the friction properties of resin matrix, and then strengthen the materials with composite modification technology. In this paper, the influence of the molecular structure on the friction properties of the resin was studied by changing the proportion of the biphenyl structural units in the main chain, and the reasons for the change of the friction properties were also studied by using the copolymers of biphenyl polyether ether ketone as the main research subject. The experimental results show that the introduction of the biphenyl unit is beneficial to the reduction of the friction coefficient of the resin as a whole, and there is an optimum value in the effect of the biphenyl unit content on the friction coefficient. By testing the properties of the copolymers and exploring the friction mechanism of the copolymers, a certain relationship was established between the molecular structure of the copolymers, the crystallinity and the friction properties of the resins. In this series of copolymers, a kind of self-lubricating composite with low friction coefficient and good wear resistance was obtained by using pure resin with low friction coefficient and carbon fiber as matrix. The thermal and mechanical properties of the composites were evaluated and studied.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33;O631.2
本文编号：2363399
[Abstract]:Poly (aryl ether ketone) high performance polymer materials have been widely used in high molecular friction materials and products such as seals bearings gears conveyor belts and artificial joints due to their advantages of light weight high strength high temperature resistance and good self-lubricating properties. The use of composite modification technology to further improve their friction and wear properties is also increasingly widespread, mainly through the addition of resin filler and solid lubricants and other components, Using the synergistic effect of these components to improve the tribological properties of polymer materials, important progress has been made in this field and has been successfully applied. However, it is not possible to improve the friction performance of the material by using compound modification alone, and if the filler is strengthened blindly, the properties of the material such as force and heat will be seriously affected with the increase of the filler. Therefore, in recent years, it has become an important means to improve the friction properties of polymer materials by means of molecular design and other ways to improve the friction properties of resin matrix, and then strengthen the materials with composite modification technology. In this paper, the influence of the molecular structure on the friction properties of the resin was studied by changing the proportion of the biphenyl structural units in the main chain, and the reasons for the change of the friction properties were also studied by using the copolymers of biphenyl polyether ether ketone as the main research subject. The experimental results show that the introduction of the biphenyl unit is beneficial to the reduction of the friction coefficient of the resin as a whole, and there is an optimum value in the effect of the biphenyl unit content on the friction coefficient. By testing the properties of the copolymers and exploring the friction mechanism of the copolymers, a certain relationship was established between the molecular structure of the copolymers, the crystallinity and the friction properties of the resins. In this series of copolymers, a kind of self-lubricating composite with low friction coefficient and good wear resistance was obtained by using pure resin with low friction coefficient and carbon fiber as matrix. The thermal and mechanical properties of the composites were evaluated and studied.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33;O631.2
【参考文献】
相关期刊论文 前2条
1 袁强,刘国民,李光亮;聚有机硅氧烷改性尼龙的摩擦性能研究[J];高分子材料科学与工程;1991年04期
2 张宏放，王尚尔，杨宝泉，莫志深，那辉，吴忠文;聚醚醚酮酮（PEEKK）和含联苯结构聚醚醚酮酮（PEBEKK）共聚物的SAXS研究[J];应用化学;1996年01期
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