纤维增强复合材料性能

<正> 1 概述只有认识材料才能用好材料,进而发展材料。纤维增强复合材料是与传统常规材料完全不同的一类新型材料,它细观上非匀质,更确切地说,应该是结构物。因此认识材粒的问题就更加重要。因为复合材料是个结构物,它具有很大的设计自由度,它可以达到的性能范围几乎是无限的。如它可设计成具有轻质高强、防腐、绝缘、导电、保温、透波、吸波、透光、耐磨等等性能,甚至可以设计出具有"头脑"、     

芳纶纤维增强S—145改性环氧树脂复合材料

S—145改性环氧树脂是一种粘度低、性能稳定和适于缠绕成型复合材料的理想树脂。用该树脂体系与芳纶纤维制成的单向复合材料(缩写为KFRP)具有优异的力学性能。     

高性能纤维环氧树脂基复合材料力学性能分析研究

随着材料技术的快速发展,高性能纤维复合材料产业突飞猛进,深刻影响着国家安全、 社会经济、科技和人类的生活,高性能纤维已成为世界各国发展高新技术、国防武器装备等战略性产业不可或缺的关键材料.文章简述了碳纤维、玻璃纤维、芳纶的性能特征、研究进展及应用现状,各自与环氧树脂结合成复合材料制件,进行力学性能测试.试验数据结果表明...     

纤维增强聚合物基复合材料的界面研究进展

本文较系统的综述了国内外增强树脂用玻璃纤维、碳纤维及芳纶纤维表面处理的方法，对各种改性技术的特点进行了评述，并指出了其进一步的发展趋势。     

熔岩基纤维增强复合材料

用玄武岩纺制的增强纤维是今年4月巴黎JEC复合材料展销上展出众多奇特的新开发材料之一,这次展销会展出的新型增强材料还有高强度聚丙烯纤维和新型碳纤维和3D织物。     

连续碳纤维增强环氧树脂基复合材料增韧改性的研究进展

从环氧树脂增韧、复合材料界面改性和层间增韧三个方面综述了连续碳纤维增强环氧树脂基复合材料的增韧机理及增韧效果,总结了国内外连续碳纤维增强环氧树脂基复合材料增韧技术的发展趋势。     

短切碳纤维增强环氧树脂复合材料的研究

采用冷模压成型工艺制备了短切碳纤维增强环氧树脂(SCFRER)复合材料,并对复合工艺参数进行了讨论。借助于金相显微镜研究了SCFRER复合材料的微观结构特征;较全面地研究了短碳纤维(SCF)含量对复合材料的热、电性能和力学性能(拉伸、弯曲和压缩强度)的影响。     

几种纤维复合材料压力容器的性能对比研究

本文对玻璃纤维、碳纤维、芳纶纤维三种常用的增强材料及其增强的薄壁金属内衬复合材料压力容器进行了对比研究，研究了三种纤维复合材料的特性、不同纤维增强的金属内衬压力容器的设计方法、每种纤维的工艺特性，研制出各种纤维增强的金属内衬压力容器，并进行了试验对比分析。     

环氧基纤维增强复合材料的应用

举例阐述了环氧基纤维增强复合材料在国内外覆铜箔板、航空航天、运动器材、管道容器、化工防腐和结构加固6个方面的应用,以及环氧基树脂生产和研发情况,指出大力发展环氧基复合材料势在必行。     

改性玄武岩纤维增强环氧树脂复合材料的力学性能

采用偶联剂KH570对玄武岩纤维(BF)进行表面改性,研究表面改性BF的长度、添加量对增强环氧树脂(EP)复合材料力学性能的影响。结果表明,改性BF表面产生很多凸起,变得非常粗糙。BF表面改性使复合材料的拉伸强度提高10%～20%,冲击强度提高10%～40%。随着改性BF长度及添加量的增加,复合材料的力学性能显著提高。当改性长BF的质量分数为4%时,与纯EP相比,复合材料的拉伸强度和冲击强度分别提高248.3%和451.5%。长BF的增强效果明显好于改性长玻璃纤维(GF),尤其纤维的添加量较大时复合材料拉伸强度的提高更为明显。当长BF的质量分数为4%时,长BF增强复合材料的拉伸强度较长GF增强复合材料提高37.8%,冲击强度提高9.2%。     

Fibre reinforced composites of multifunctional epoxy resins

Glass and carbon fibre reinforced epoxy composites were fabricated for N,N,N′,N′-tetraglycidyl-4,4′-diaminodiphenyl methane (TGDDM) and its formulated systems with tri- and di-functional reactive epoxy diluents using 30% diaminodiphenyl sulphone (DDS) as a curing agent. The epoxy laminates were evaluated for their physical, chemical and mechanical properties [at room (26°C) and high (100°C) temperatures]. A marginal increase (<20%) in the mechanical properties of CFRP was found compared with GFRP laminates. Incorporation of epoxy diluents altered the mechanical properties of the composites significantly. The incorporation of triglycidyl-4-aminophenol diluent to TGDDM systems resulted in an improvement in mechanical properties of about 2–6%.     

Dynamic mechanical analysis of FRP composites based on different fiber reinforcements and epoxy resin as the matrix material

Three-ply composite laminates prepared from E-glass or N-glass chopped strand mats (CSMs) and jute (J) fabrics as reinforcing agents and amine-cured epoxy resin as the matrix material were subjected to dynamic mechanical thermal analysis at a fixed frequency of 1 Hz over a temperature range of 30–180°C. The volume fraction of fibers ranged between 0.21 and 0.25. The reinforcing effect for the three fibers is in the order E-glass > N-glass ≫ jute. Glass-reinforced composites show a higher storage modulus (E′) than that of jute-reinforced composites. The E′ values of glass-jute hybrid composites lie between those of glass-reinforced and jute-reinforced composites. Odd trends in temperature variability of the loss modulus (E′) and the damping parameter, tan δ, and in the glass transition temperature (T_g) for the three different unitary and four different hybrid composites are interpreted and understood on the basis of odd differences in (1) the chemical nature and physical properties of the three different fibers (E-glass, N-glass, and jute), (2) the void content and distribution, (3) the thermal expansion coefficients of the main phases in the composites, (4) the degree of matrix stiffening at or near the fiber-matrix interface, and (5) the extents of matrix softening in the zone next to the interface. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2467–2472, 1997     

Carbon fibre reinforced epoxy composites

Carbon fibre reinforced epoxy composites were fabricated from the matrix resin diglycidyl ether of bisphenol-A and novel tetrafunctional epoxy resins N,N,N′,N′-tetraglycidyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane and N,N,N′N′-tetraglycidyl-1,1 ′-bis[4-(4-aminophenoxy)phenyl]cyclohexane using diaminodiphenyl methane as curing agent. Mechanical properties and chemical resistance of the composites were determined. Significant improvements in the mechanical properties were observed by adding epoxy fortifier to the resin-curing agent mixtures before fabrication of composites.     

碳纤维增强树脂基复合材料的应用研究

碳纤维增强树脂基复合材料以其优异的综合性能成为当今世界材料学科研究的重点。本文介绍了的碳纤维增强复合材料的性能，简述了增强机理、成型工艺及其应用领域和发展趋势。     

Chemical recycling of glass fiber reinforced epoxy resin cured with amine using nitric acid

An approach to chemical recycling of amine cured epoxy resin using nitric acid solution has been proposed [Dang W, Kubouchi M, Yamamoto S, Sembokuya H, Tsuda K. Polymer 2002;43:2953-8. [1]]. 1,8-p-Menthanediamine cured bisphenol F type (BPF/MDA) epoxy resin was decomposed in nitric acid solution, and then the decomposed product was repolymerized with original resin. In this paper, applicability of the proposed approach to glass fiber reinforced bisphenol F type epoxy resin cured with diamino diphenyl methane (DDM) was investigated. It was concluded that the approach was applicable to BPF/DDM epoxy resin, and potentially to all of amine cured epoxy resin. Flexural strength of the recycled resin was higher than that of virgin resin until the content of the neutralized extract, which was available from degradation of BPF/DDM epoxy resin, was not more than 30 wt% of the original resin. The reinforcement of glass fiber could be separated and recovered. The existence of the reinforcement did not affect decomposition the matrix.     

碳纤维增强环氧树脂基复合材料的性能研究

研究了WBS-3环氧树脂固化体系的反应特性,分析了该固化体系浇铸体的性能;并以碳纤维(T-700S)为增强材料,采用手糊成型螺栓加压工艺制备了WBS-3/T-700S复合材料,研究了复合材料的常温力学性能、高温力学性能、水煮后力学性能和动态力学性能,并对弯曲断面进行分析。研究结果表明,WBS-3树脂基体黏度低、适用期长且韧性好,适合于手糊成型、缠绕成型等低成本制造工艺;由此制得的WBS-3/T-700S复合材料具有优良的力学性能和耐高温性能,其弯曲强度为1434MPa,拉伸强度为1972MPa,剪切强度为76.1MPa,玻璃化温度(Tg)超过210℃;该WBS-3/T-700S复合材料具有很好的界面粘接性(树脂对纤维的浸润性良好)、较低的空隙率且纤维分布均匀。     

Development of rubber pressure molding technique using butyl rubber to fabricate fiber reinforced plastic components based on glass fiber and epoxy resin

A rubber pressure molding (RPM) technique is developed to prepare fiber reinforced plastic components (FRP) using glass fiber and epoxy resin. The technique is based on the matching die set, where the die is made of hard metal like steel and the punch from flexible rubber like materials. The use of flexible rubber punch helps to intensify and uniformly redistribute pressure (both operating pressure and developed hydrostatic pressure due to the flexible rubber punch) on the surface of the product. A split steel die and rubber punch were designed and fabricated to prepare the FRP components. The same split die was also used to cast the rubber punch. Butyl rubber was used to prepare a rubber punch in this investigation. Burn test, coin test, scanning electron microscopy and mechanical tests like interlaminar fracture toughness, interlaminar shear test, tension test, etc were carried out to know the fiber content, void content, presence of delamination, bonding between fiber and resin, microstructure, and mechanical properties of the composite materials. These properties were also compared with FRP components made by the conventional technique to evaluate its performance in the structural applications. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1095–1102, 2006     

耐高温高导热环氧树脂／玻纤／BN复合材料的制备

以4,4-二氨基二苯砜（DDS）和内亚甲基四氢邻苯二甲酸酐（NA）为复配固化剂,采用高温模压成型法制备耐高温高导热环氧树脂／玻纤／氮化硼（BN）复合材料。探讨了BN用量和偶联剂处理对复合材料冲击强度、导热性能和电阻率的影响。结果表明：当nDDS：nNA=3：1时,复合材料的耐热性能最佳。当BN质量分数为8％时,复合材料的冲击强度最高;导热性能随BN用量的增加而增加,当BN用量为15％时,热导率为0．7560W／（mk）,此时复合材料仍保持较高的体积、表面电阻率;当BN填充量为一定值时,偶联剂处理使冲击强度和导热性能得到进一步提高。     

导热型环氧复合材料的研究进展

介绍了导热型环氧复合材料导热性能和导热机理。并综述各类导热环氧复合材料的研究进展,在此基础上讨论提高复合材料导热性能的途径。     

Interfacial studies on the surface modified aramid fiber reinforced epoxy composites

In this work, solutions of rare earth modifier (RES) and epoxy chloropropane (ECP) grafting modification method were used for the surface treatment of aramid fiber. The effect of chemical treatment on aramid fiber has been studied in a composite system. The surface characteristics of aramid fibers were characterized by Fourier transform infrared spectroscopy (FTIR). The interfacial properties of aramid/epoxy composites were investigated by means of the single fiber pull‐out tests. The mechanical properties of the aramid/epoxy composites were studied by interlaminar shear strength (ILSS). As a result, it was found that RES surface treatment is superior to ECP grafting treatment in promoting the interfacial adhesion between aramid fiber and epoxy matrix, resulting in the improved mechanical properties of the composites. Meanwhile, the tensile strengths of single fibers were almost not affected by RES treatment. This was probably due to the presence of reactive functional groups on the aramid fiber surface, leading to an increment of interfacial binding force between fibers and matrix in a composite system. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102:4165–4170, 2006