Dimensional stability and tensile properties of drawn polystyrene composites

摘要

AbstractRecovery experiments aboveTgand tensile tests have been performed on glass bead and short glass fiber–polystyrene composite sheets obtained from extrusion and subsequent hot drawing. A shift procedure has been applied to the recoil data using a WLF equation. The data reported show that both dimensional stability and mechanical properties are enhanced by adding rigid fillers to the drawn thermoplastic matrix. The presence of short fibers reduces strongly the recoverable strain of the oriented material. A simple model able to predict the equilibrium values of the length reversion ratio of glass bead composites is developed and compares well with the experimental dat