共查询到20条相似文献,搜索用时 93 毫秒
1.
复合材料RTM成型工艺综述 总被引:1,自引:0,他引:1
本文主要是综述RTM成型工艺的基本原理、工艺特点,讨论了适于RTM的增强材料和树脂休系并讨论了工艺参数对RTM模制品质量的影响以及RTM在成型三维复合材料方面的应用。 相似文献
2.
3.
4.
我国树脂基复合材料成型工艺的发展方向 总被引:12,自引:0,他引:12
介绍了我国树脂基复合材料成型工艺已陈旧过时、必须更新换代的原因;RTM和辐射固化(主要有EB、UV固化)的优越性;得出的结论是,树脂基复合材料的最佳成型技术是RTM成型 EB(或UV)固化技术。 相似文献
5.
6.
本文应用BMI树脂制造出耐温等级为180℃的碳纤维复合材料结构用管材,并对高性能复合材料材的缠绕及RTM成型工艺,基体BMI树脂的工艺适应性进行了研究。 相似文献
7.
树脂传递模塑(RTM)成型工艺及应用 总被引:3,自引:0,他引:3
本文概述了树脂传递模塑(RTM)的成型工艺过程及其应用前景。由此可了解 RTM 技术的全貌。通过对 RTM 与其它几种主要的复合材料加工工艺的比较,如SRIM(结构反应注射成型),SMC(片材成型)等,可以清楚地认识到 RTM 作为新一代复合材料加工工艺在航空、航天、航海、汽车和建筑等各个领域的发展潜力。 相似文献
8.
酚醛复合材料的RTM熔芯成型 总被引:2,自引:0,他引:2
采用酚醛树脂传递模型(RTM)及低熔点合金可熔性型芯复合工艺,成型莆状极其复杂的复合材料发动机机体,对成型温度,树脂粘度及型芯的熔化温度等工艺参数进行实验研究,为优化复合材料发动机机体成型工艺提供了理论和实验基础。 相似文献
9.
10.
11.
This paper presents a development of carbon-carbon (C-C) composite by resin transfer molding (RTM) process. The RTM was used for both manufacturing of the resin matrix composite part as well as impregnation of the carbonized parts. Materials chosen were heat-treated T300 2-D carbon fabric and Primaset PT-30 cyanate ester. The PT-30 resin has a char yield similar to that of phenolics, very low volatiles, low viscosity at processing temperatures, and no by-products during cure, and hence, an excellent choice for RTM process. The process consists of RTM of the composite part, carbonization, RTM impregnation, and re-carbonization. The last two steps were repeated to achieve the desired density. The measured density and mechanical properties of just two times-densified C-C composite panels were superior to or nearly the same as the data in the literature by other processes. The RTM densification is about twice as fast as the resin solution method and it is environment friendly. 相似文献
12.
RTM用环氧树脂体系的固化工艺研究 总被引:2,自引:3,他引:2
本文研究了以多官能团环氧树脂及液体酸酐为基体,以叔胺及有机酸盐为促进剂组成的RTM用环氧树脂体系,采用DSC和DMA等方法研究了树脂体系的固化工艺及固化物的性能.结果表明:该树脂体系粘度低,适用期长,适用于RTM工艺;该树脂体系的湿热性能较差,需进一步研究改性. 相似文献
13.
Properties of poly(butylene terephthatlate) polymerized from cyclic oligomers and its composites 总被引:1,自引:0,他引:1
The high viscosity of thermoplastic matrices hampers fiber impregnation. This problem can be overcome by using low viscous polymeric precursors such as cyclic butylene terephthalate (CBT® resins), which polymerize to form a thermoplastic matrix. This allows thermoset production techniques, like resin transfer molding (RTM), to be used for the production of textile reinforced thermoplastics. Due to the processing route and more specifically the time-temperature profile, inherent to the RTM process, the crystallites of the matrix consist out of well-defined, thick and well-oriented crystal lamellae. Together with a high overall degree of crystallinity and a low density of tie molecules, these large and perfect crystals cause polymer brittleness. Matrix brittleness lowers the transverse strength of unidirectional composites to below the matrix strength, but leaves the mechanical properties in the fiber direction unaffected. Although not a valid option for the RTM production route, crystallization from a truly random melt and at a sufficiently high cooling rate would substantially improve the ductility. 相似文献
14.
15.
Resin transfer molding (RTM) has the potential to manufacture high quality, geometrically complex composite parts. Benzoxazine is a new kind of high performance composite matrix. It can be polymerized with a ring‐opening reaction without releasing volatiles. In this article, a novel RTM resin made from aromatic diamine, phenol and formaldehyde is reported. The viscosity and curing behavior of the RTM resin as well as the properties of the cured neat resin and fiber reinforced composite were investigated. The resin has a viscosity lower than 0.5 Pa · s after 4 hr at 100°C, and can be cured at 180°C. The tensile strength, modulus, and elongation of the cast resin are 94 MPa, 4.6 GPa, and 2.2%, respectively. The flexural strength and modulus of the cast resin are 160 MPa and 4.9 GPa. The flexural strength and modulus of its glass fiber laminate are 662 MPa and 30 GPa. It is very easy to control the viscosity and curing rate of the RTM resin through the addition of reactive dilute agents and catalysts according to the requirement of RTM processing. POLYM. COMPOS., 26:563–571, 2005. © 2005 Society of Plastics Engineers 相似文献
16.
用于树脂压铸(RTM)的树脂基体研究 总被引:3,自引:0,他引:3
文中介绍了RTM用树脂体系的研究概况,结果表明树脂体系具有低的粘度,较长的贮存期和良好的反应性能,固化树脂和复合材料的力学性能及耐热性能优良,它能满足RTM对基体的要求。 相似文献
17.
RTM专用混合型树脂体系研究——反应特性与工艺特性研究 总被引:10,自引:4,他引:6
本文采用乙烯基酯树脂和环氧树脂体系共混改性的方法。研究和开发具有良好工艺性、耐热性和力学性能的低成本RTM用树脂体系。研究表明,乙烯基酯树脂和环氧树脂体系具有良好的共混特性。DSC及粘度分析研究表明,混合型树脂体系中的乙烯基酯组份分散了环氧树脂的反应放热,有效降低了711环氧树脂的反应速度和改善了树脂的工艺特性。使混合型树脂具有较好的RTM工艺低粘度平台工艺性能。所研究的混合型树脂体系可用于RTM 相似文献
18.
Resin transfer molding (RTM) of advanced fiber architecture materials promises to be a cost effective process for obtaining composite parts with exceptional strength. However there are a larger number of material processing parameters that must be observed, known, and/or controlled during the resin transfer molding process. These include the viscosity both during impregnation and cure. In-situ sensors which can observe these processing properties within the RTM tool during the fabrication process are essential. This paper will discuss recent work on the use of frequency dependent electromagnetic sensing (FDMS) techniques to monitor these properties in the RTM tool. Our objective is to use these sensing techniques to address problems of RTM scaleup for large complex parts and to develop a closed loop, intelligent, sensor controlled RTM fabrication process. 相似文献
19.
从树脂传递模塑(RTM)的专用树脂、增强材料、理论研究、工艺、仿真技术、模具等方面阐述了当前我国RTM技术的研究进展,指出了当前我国RTM存在研究成果应用于实践的较少,受成本限制,应用领域较窄,成型产品性能低下等问题,并提出了低成本、高性能、易操作和能快速成型的原材料研究方向,以及把理论实验研究与实际生产应用结合起来的解决思路。 相似文献
20.
High temperature vacuum assisted resin transfer molding of phenylethynyl terminated imide composites
Xiang Fu Chuck Zhang Richard Liang Ben Wang Jennifer C. Fielding 《Polymer Composites》2011,32(1):52-58
Vacuum Assisted Resin Transfer Molding (VARTM) has proven to be a cost effective process for manufacturing composite structures compared with prepreg/autoclave and traditional resin transfer molding (RTM) processes. However, VARTM has not been accomplished with high temperature resins (such as polyimides) until recently, primarily because no resins had low melt viscosity and long melt stability that are required by VARTM. With the recent invention of phenylethynyl terminated imides (PETIs), high temperature VARTM has been achieved. Two processing methods, in‐plane and through‐thickness resin flow, were proposed and tested. Both methods are capable of fabricating polyimide matrix composites; and the carbon fiber laminates yield good fiber‐resin interfacial bonding and comparable mechanical properties to those laminates fabricated using RTM. POLYM. COMPOS., 2011. © 2010 Society of Plastics Engineers 相似文献