On the characterization of non-newtonian flow

Abstract

A rheological distribution factor has been derived from well-known relations. It is compared with experimental data with the use of conventional ratios of molecular weights such as Mw/Mn. Data on polyisobutylene, polystyrene, and high density polyethylene are presented. An equation of flow has also been derived from experimental data. It has been used to describe the non-Newtonian flow of various polymers.