【摘要】：聚芳醚酮高性能聚合物材料具有輕質高強度、耐高溫及良好的自潤滑性等特點，廣泛應用于高分子摩擦材料及制品領域，，如密封件，軸承，齒輪，傳送帶和人造關節(jié)等。利用復合改性技術進一步改善其摩擦磨損性能的研究也日益廣泛，主要集中在通過在樹脂中添加增強填料及固體潤滑劑等組分，利用這些組分的協(xié)同作用來改善聚合物材料的摩擦性能，這方面的研究已經取得了重要進展并成功獲得應用。但是，單用復合改性的方式來提高材料的摩擦性能，已無法滿足越來越高的應用需求，而且如果一味地尋求填料增強，隨著填料的增多，材料力、熱等性能也將受到嚴重影響。因此，近些年來，通過分子設計等方式改善樹脂基體本身的摩擦性能，再結合復合改性技術對材料進行增強，成為提升聚合物材料摩擦性能的一種重要手段。 本文選擇了以聯(lián)苯聚醚醚酮酮共聚物為研究主體，通過改變主鏈中聯(lián)苯結構單元的比例，來研究分子結構的改變對樹脂的摩擦性能的影響以及使摩擦性能變化的原因。從實驗結果來看，聯(lián)苯單元的引入整體上有利于樹脂摩擦系數的降低，并且在聯(lián)苯單元含量對摩擦系數影響方面存在最優(yōu)值。通過對該系列共聚物性能的測試以及對摩擦機理的深入探究，在共聚物分子結構，結晶度和樹脂摩擦性能之間建立起了一定聯(lián)系。以此系列共聚物中摩擦系數較低的純樹脂作為基體，通過與碳纖維復合的方式，得到了一種既具有低摩擦系數，又具備良好的耐磨損性能的自潤滑復合材料，并開展了復合材料的熱性能和機械性能等的評價和研究工作。
[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.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB33;O631.2

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