Effect of sorbitol nucleator on elongational viscosity of linear-, branched- and mareic anhydrated-PP

摘要

In this study, we investigated effects of sorbitol nucleatoar on the theological properties in linear-PP, branched-PP and PP-g-MA. In linear- and branched-PP, the samples indicated gel-like behavior on dynamic rheology measurement. On uniaxial elongational measurement, linear viscosities of these samples were higher than that of neat-PP but linear-PP showed a property of strain softening. While higher molecular weight linear-PP showed less a property of strain softening. On one hand branched-PP showed dependence on strain rates. In fast strain rates, branched-PP showed a property of strain hardening but that did not show a property of strain hardening in slow strain rates.