Anelastic Deformation of a Thermoplastic-Matrix Fiber Composite at Elevated Temperature; Part 3: Structure and Thermomechanical Properties of AS4/J1 Polymer Composite.

摘要

Structural characterization of the AS4-graphite/J1-polymer composite were conducted, using Differential Scanning Calorimetry (DSC) and Wide-Angel X-Ray Diffraction (WAXD) analysis. The DSC results indicate the significant effect of processing variables on the morphology, microstructure and crystallinity of the fiber reinforced semicrystalline thermoplastic matrix composite. From the WAXD results, crystallinity of the composite is determined. Time-temperature dependent thermomechanical properties of the composite are evaluated, using dynamic mechanical property spectroscopy and creep compliance measurements. Dynamic mechanical property spectra reveal the matrix dominant time-temperature dependent behavior of the composite under torsional loading. Elevated temperature creep compliance in the longitudinal direction shows time-temperature independent behavior, whereas transverse creep deformation is found to be significantly time-temperature-stress dependent.