材料科学与工程-聚合物基复合材料及其制备加工

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3. As a fiber, it is relatively strong, and when embedded in a plastic matrix, it produces a composite having a very high specific strength.
4. When coupled with the various plastics, it possesses a chemical inertness that renders the composite useful in a variety of corrosive environments.
Fiber diameters (纤维直径)normally range between 3μm and 20 μm.
Glass is popular as a fiber reinforcement material for several reasons:
1. It is easily drawn into high-strength fibers from the molten state. 2. It is readily available and may be fabricated into a glassreinforced plastic economically using a wide variety of composite-manufacturing.
2. They retain their high-tensile modulus and high strength at elevated temperatures;
3. At room temperature carbon fibers are not affected by moisture or a wide variety of solvents, acids, and bases.
树脂基体与增强体相容性、浸润性较差,多经过表面 处理与表面改性,浸润剂、偶联剂、涂复层的使用, 使其组成复杂化。
5.3.1 Glass fiber-reinforced polymer composites
It is simply a composite consisting of glass fibers, either continuous or discontinuous, contained within a polymer matrix;
4. These fibers exhibit a diversity of physical and mechanical characteristics, allowing composites incorporating these fibers to have specific engineered properties.
5. Fiber and composite manufacturing processes have been developed that are relatively inexpensive and cost effective.
压力下成型,工艺性差 ii) 线性分子结构,抗蠕变和尺寸稳定性差,但韧性好 iii) 制备过程中伴有聚集态结构转变及取向、结晶等物
理现象)
Polyethylene(聚乙烯);Polypropylene(聚丙烯);polystyrene (聚苯乙烯 );Poly (methyl -methacrylate)(聚甲基丙烯酸甲酯);Epoxy(环氧基树脂) rubber
Polymer-matrix composites
聚合物基复合材料
•5.3.1 Glass fiber-reinforced polymer composites •5.3.2 Carbon fiber-reinforced polymer composites •5.3.3 Aramid fiber reinforced polymer composites
Reinforcement medium(增强体)
Particle
carbon black(黑碳黑); silicon dioxide(白碳 黑); ferric oxide(氧化铁),etc.
Fiber Glass fiber(玻璃纤维) ; Carbon fiber(碳纤维); aramid(芳族聚酰胺纤维) ;
Polymer-matrix composites (聚合物基复合材料)
It consist of a polymer resin (树脂)as the matrix, with fibers and particles as the reinforcement (增强 体)medium.
Matrix materials (基体材ቤተ መጻሕፍቲ ባይዱ)
fiber diameters normally range between 4 and 10μm
Characteristics:
1. Carbon fibers have the highest specific modulus and specific strength of all reinforcing fiber materials.
5.3.2 Carbon fiber-reinforced polymer composites
Carbon is a high-performance(高性能) fiber material that is the most commonly used reinforcement in advanced polymer-matrix composites.
热固性基体(thermosetting matrix): i) 熔体或溶液粘度低,易于浸渍与浸润,成型工艺性好 ii) 交联固化成网状结构,尺寸稳定性、耐热性好,但性
脆 iii) 制备过程伴有复杂化学反应
热塑性基体(thermoplastic matrix): i) 溶体或溶液粘度大,浸渍与浸润困难,需较高温度和
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