THE RHEOLOGICAL AND MECHANICAL PERFORMANCE OF COMMERCIAL uPVC FORMULATIONS

摘要

Rheological and mechanical analysis of a range of virgin, recycled, and pigmented uPVC formulations used in extruded profiles for conservatory roofing applications is reported. The shear viscosity, tensile properties and dynamic mechanical thermal properties of the various formulations were shown to be dependent on stabiliser type, thermal processing history and pigment concentration. Lead stabilised uPVCs were shown to have better impact properties than Ca/Zn stabilised compounds and slight differences in T_gs, storage modulii (E') were recorded for all formulations.