Tlakové závislosti viskozity nanokompozitů

Abstract

V této práci byly studovány tlakové závislosti smykové a elongační viskozity nanokompozitu na bázi Surlynu a montmorillonitu a to na základě tlakového koeficientu. Bylo zjištěno, že tlakový koeficient klesá s rostoucím podílem nanoplniva.

Nanocomposites of extrusion-type Surlyn ionomer and intercalated sodium-type montmorillonite were compounded on a KO-kneader and measured on a modified capillary rheometer for strain rate versus pressure dependencies of shear and elongational viscosities for various clay concentrations. The modified White-Metzner model was employed to simultaneously fit the viscosity data and determine pressure coefficients

these have been found to decrease with the loading level of the nanocomposites. Increasing relaxation times with rising filler content indicate earlier onset of non-Newtonian behaviour under shearing, and hardening at strain.