Abstract
The effects of length and concentration of carbon (CF) and glass fibers (GF) on the rheological, physicomechanical, and thermal properties of the high-temperature thermoplastic polyphenylene sulfone (PPSU) containing up to 40 wt% filler were studied. The fillers were CF and GF of lengths 0.2 and 3 mm. Addition of CF and GF decreased noticeably the melt flow index and PPSU impact viscosity so that the flowability limit disappeared in the stress—strain diagram because of the reduced ability of the material for plastic deformation. The elasticity modulus and strength of the composite for bending and tension increased with increasing fiber content. The heat resistance increased significantly with increasing CF content. Samples containing CF of length 0.2 mm had higher massloss temperatures. The heat resistance changed insignificantly for composites containing GF.
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