Multiple dispersion regions in rigid polymeric systems

Abstract

Abstract It is shown how chemical and colloidal heterogeneity can result in multiple dispersion regions of the mechanical or electrical loss factor as a function of temperature. Heterogeneity can be produced in several ways: ( a ) mechanical blending (mixing) of certain polymers, ( b ) non‐uniform copolymerization, ( c ) block or graft polymerization, ( d ) external plasticization, and ( e ) certain types of molecular weight distribution. Specific examples are given to demonstrate the effect.