the data on the effect of ethylene concentration on polymerization rate for several modifications of modern highly active titanium–magnesium catalysts ticl4/mgcl2 are presented. these catalysts differ in titanium content and conditions of support preparation, activities, and the shape of kinetic curves. it is found that the observed order of polymerization rate with respect to ethylene in the r...

This work investigates the possibility of obtaining molecular weight distribution (MWD) linear ultrahigh (UHMW) polypropylene (PP) through rheology. To this end, viscoelastic response a set UHMWPP samples is measured over largest possible frequency range. The terminal relaxation achieved by running creep experiments and converting compliance in dynamic moduli. A time–temperature concentration p...