Reinforced thermoplastic composites tensile strength

Ramsleiner F. and Theysohn R. (1979). Tensile and impact strength of uni-directional short fiber reinforced thermoplastics. Composites 10, 111-119. 

Rashed HMMA, Islam MA, Rizvi FB (2006) Effects of process parameters on tensile strength of jute fiber reinforced thermoplastic composites. J Nav Arch Mar Eng 3 1-6... 

VK Stokes. Random glass mat reinforced thermoplastic composites. Part IV. Characterization of the tensile strength. Polymer Composites 11 354-367, 1990. 

Table 3.131. Tensile strength of composite, s, and matrix, s for 30 weight % (16 vol. %) short-glass-fiber-reinforced thermoplastic composites [1260]...

Tensile Strength. Composite tensile strength (a ) are often predicted from the Kelly-Tyson equation for discrete uniaxially aligned fiber reinforced composites, modified to accoimt for the non-uniaxial orientations of thermoplastic composites [24]. 

Plastics, particularly polymer-based composites (both thermoplastic and thermoset composites), have been exploited in transportation appUcations for decades. The use of common composites such as glass or carbon fiber reinforced unsaturated polyesters, epoxy, and poly(vinyl ester) matrices is well known. The unique advantage of composites is their strength (tensile strength 4-6 times that of steel) and stiffness, despite their lightweight. 

Adherent Technologies Inc. [8] has developed a process for the reclamation of carbon fibers from carbon/epoxy composites. It has studied the depolymerization of thermoset carbon fiber reinforced epoxy matrix composites using a low temperature (20 min at 325°Q catalytic tertiary recycling reclamation process and has been able to obtain a product with 99.8% carbon and 0.2% residual resin, with only a loss of about 8.6% in fiber tensile strength. The process can be economically viable, provided sufficient scrap feedstock is available. Possible applications for the recovered fiber include thermoplastic and thermoset molding compounds. 

Compared to most isotropic polymers, thermotropic LCPs possess outstanding mechanical properties due to their rigid rod-like backbones. It has been reported that LCPs have tensile strength in a range of 150 to 400 MPa and tensile modulus from 13 to 25 GPa, while LCP fibers have tensile strength ranging from 500 to 650 MPa and tensile modulus from 50 to 100 GPa. When LCPs are blended with thermoplastics in a process where an elongational flow field exists, the LCP phase will deform into molecularly oriented fibers that reinforce the thermoplastic matrix. So, until now, many isotropic polymers have been blended with LCPs. Table 7.5 summarizes various in situ composites reported, with their machine direction mechanical properties. 

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