Characterization of interfacial interactions in high density polyethylene filled with glass spheres using dynamic‐mechanical analysis

Abstract

SynopsisThe dynamic-mechanical properties of high density polyethylene filled with 20% by volume of untreated glass spheres or glass spheres treated with a silane-based coupling agent were studied as a function of temperature and imposed tensile deformation. The coupling agent used is capable of providing covalent bonding between the polymeric matrix and the glass spheres. It is assumed that an interphase region is formed in the matrix around each filler particle with properties depending on the surface treatment of the filler, but different to that of the bulk matrix. It is shown how the mechanical loss factor can be used to characterize the properties of the interphase region and the degree of adhesion between the two phases, as affected by the surface treatment. We suggest that these kinds of measurements can be valuable when determining the effectiveness of various surface treatments of filler particles from a mechanical point of view.

Processing and structure–property relationships of natural rubber/wheat bran biocomposites

“…Kubát et al (1990) assumed that the loss factor of the composite (tan d c ) can be expressed in terms of volume fraction and mechanical damping of filler, interface and polymer matrix by presented formula (14):…”

Thermoplastic Matrix Reinforced with Natural Fibers: A Study on Interfacial Behavior

“…Adhesion factor presents a macroscopic quantitative measure of interfacial adhesion during dynamic loading and at high levels of interface adhesion, the molecular mobility surrounding the filler is reduced, and consequently low values of the adhesion factor suggest improved interactions at the matrix-filler interface (Kubat et al, 1990). As can be seen, below of glass transition temperature, the maximum amount of adhesion factors are related to untreated samples which means the weakest interface has been formed for samples containing untreated wood flour.…”

“…For determination of adhesion factor as interfacial intraction criterion, Correa et al, (2007) has been used equation originated from Kubat et al, (1990) work, about high density polyethylene filled with 20 Vol. % glass fibers.…”

“…Around this temperature (around 22˚C), slop of curves changes and the adhesion factor passes through a maximum due to more polymer chains mobility. According to Kubat et al, (1990) by increasing the temperature there was a release of the thermal stresses at the filler surface and reduced filler-matrix friction and should be related to a more cohesive matrixfiller interface (lower A). In other words, a strong interfacial adhesion i.e.…”

Influence of Chemical Modification on the Mechanical, Morphological and Thermal Properties of Pine Needles Reinforced Thermosetting Composites

“…in aerospace, automotive, marine, infrastructure, military etc. Natural fibers like flax, Hibiscus sabdariffa, pinus, jute, pineapple leaf fiber, oil palm fiber have all been proved to be good reinforcements in thermoset and thermoplastic matrices [20][21][22][23][24] . Pine needles are abundantly found in the Himalayan region.…”