a study on rheological behavior of pp/pe copolymers based on generalized maxwell model

It is fundamental to understand how rheology applies to the characteristics of polymers because polymer melts are viscoelastic.  in this study, parameters of seven-element generalized maxwell (gm) model for five samples including: 1) low molecular weight polypropylene (pp), 2) high molecular weight narrow distribution pp, 3) high molecular weight wide distribution pp, 4) block structure polypropylene/polyethylene (pp/pe) co-polymer and 5) random structure pp/pe co-polymer have been calculated and reported. also, the effects of molecular weight (mw), molecular weight distribution (mwd) and the structure of polyethylene chains in pp co-polymer samples on the viscoelastic behavior have been discussed.