Carbon fiber reinforced polymer systems

In a carbon fiber reinforced polymer, the polymer matrix is heated more quickly in the microwave field than the fiber. This is the reason why accumulation of resin or resin-rich volumes should be avoided when designing a component to be processed in microwave heating, since these areas cause heating momentum that can damage the component. Due to the possible leakage of the microwave system, safety measures need to be taken while processing composite components. Furthermore, due to the risk of... 

Meier, U. and Stocklin, I. (2005), A novel carbon fiber reinforced polymer (CFRP) system for post-strengthening . International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR), Taylor Francis, London, pp. 477-479. 

Carbon fiber-reinforced polymer (CFRP) lining systems have been used increasingly for internal rehabilitation of water and wastewater pipelines since the mid-1990s. The primary motivation for use of CFRP linings as a rehabilitation technology is minimizing disruption to the surrounding environment, particularly for distressed pipelines with difficult access to the exterior of the pipeline. 

Carbon fiber reinforced composites are at the forefront of current developments in polymer composites, and there is additional evidence for the important role being played by IGC in characterizing the interface in such systems. The Gutmann theory is used by Bolvari and Ward, who report add/base interactions for surface-treated carbon fibers and a series of thermoplastic polymer hosts, including polysulfone, polycarbonate, and... 

In this article, we introduce a recently developed ultrasonic spectroscopy method and review its application to polymeric studies. First, the principle of this ultrasonic spectroscopy is explained including the instruments and data analysis methods. Then, actual application of this measuring system is described for the characterization of solid polymers and the observation of phase transition phenomenon in liquid crystals and ferroelectric (VDF/TrFE) copolymer. Finally, the extension of this system to two-dimensional measuring and the application to non-destructive testing of CFRP (carbon fiber reinforced plastics) are discussed. 

Several other important things must be kept in mind when considering composite properties. For one, most composites are proprietary material systems made by proprietary processes. There are few industry or government specifications for composites as there are for many structural metals. However, this is also the case for many monolithic ceramics and polymers, which are widely used engineering materials. Despite their inherently proprietary nature, there are some widely used composite materials made by a number of manufacturers that have similar properties. Notable examples are standard modulus (SM) and intermediate modulus (IM) carbon fiber-reinforced epoxy. 

Theoretical investigations addressing the percolation of rods are important for predicting insulator-conductor transitions in real composite systems with rodlike fillers. Such systems include early fiber-reinforced polymer composites and the more recent polymer nanocomposites containing carbon nanotubes and metallic nanowires. Since the early 1980s, extensive analytical and computational studies have been conducted for sticks in 2D, and also for rods in As... 

Applied Sciences, Inc. has, in the past few years, used the fixed catalyst fiber to fabricate and analyze VGCF-reinforced composites which could be candidate materials for thermal management substrates in high density, high power electronic devices and space power system radiator fins and high performance applications such as plasma facing components in experimental nuclear fusion reactors. These composites include carbon/carbon (CC) composites, polymer matrix composites, and metal matrix composites (MMC). Measurements have been made of thermal conductivity, coefficient of thermal expansion (CTE), tensile strength, and tensile modulus. Representative results are described below. 

The additional chain orientation in the direction of the fiber long axis, obtained from the nematic self-ordering in the system, leads to a dramatic enhancement of the mechanical properties of the polymer. A number of aromatic polyamides have thus achieved commercial importance because of the very high tensile strengths and moduli of the fibers that can be spun from the nematic solutions. These have consequently become attractive alternatives to metal or carbon fiber for use in composites as reinforcing material. The most significant of these aramid fibers are ... 

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