a interfacial parameter in Nicolais-Narkis model for yield strength of polymer particulate nanocomposites as a function of material and interphase properties

In this paper, a interfacial parameter in Nicolais-Narkis model is expressed by thickness r(i) and strength sigma(i) of interphase between polymer and nanoparticles as well as material properties. a parameter is connected to B-1 interfacial parameter in modified Pukanszky model and the effects of r(i) and sigma(i) on a are explained. The negligible difference between a values calculated by fitting the experimental results to Nicolais-Narkis model and also, by B-1 results confirms the accurateness of the suggested relation between a and B-1 parameters. Additionally, an inverse relation is found between a and B-1 parameters for nanocomposites containing spherical nanoparticles. The results demonstrate that the slight levels of r(i) and sigma(i) data give a large value of a which indicates the poor interfacial adhesion. (C) 2016 Elsevier Inc. All rights reserved.