Dispersed State of Glass Fibers and Dynamic Viscoelasticity of Glass Fiber Filled Polypropylene Melts

Abstract

Dispersion state of chopped glass fibers (GF) filled in a polypropylene (PP) before and after application of shear flow were studied by means of direct observation of the glass fibers and the dynamic viscoelasticity measurement of melt samples. Dispersion state of the fibers in PP/GF samples varies with the fiber length and the compatibility of binder polymer with the matrix polymer. The difference of the state of filled fibers in the matrix affects significantly the dynamic viscoelasticity of the melt samples.