Mechanical Properties of Bio-Composites Based on Polymer Blends of Ethylene-Vinyl Acetate Copolymer and Polyethylene with Natural Fillers

Abstract

Highly filled bio-composites based on ethylene-vinyl acetate copolymer (EVA) with cellulose and wood flour were prepared in the previous parts of the study. The aim of this work was to dilute them with a polyethylene (PE), to prepare new bio-composites with lower EVA content and to investigate the effect of EVA/PE ratio on the mechanical properties. It was shown that melt flow index (MFI) and elongation at break increased additively with an increase of EVA content in the composition, but yield strength had an inverse tendency. The obtained results are extremely useful for choosing the right composition for the industrial implementation.

Extrusion foaming of multiphasic polyethylene/ethylene-vinyl acetate copolymer/carbon nanotube mixtures: Tailoring foam properties by selective localization of nanoparticles

“…PE and EVA levels in the samples are fixed, which were chosen according to the better results of the PE-rich blends than EVA-rich ones. 29,30 The contents of ADA and multi-wall carbon nanotube (MWCNT) in Table 1 have phr unit, parts per hundred parts of resin (resin: PE plus EVA). For all prepared foams, the corresponding control samples were extruded at the same formulations and processing conditions without using ADA chemical foaming agents (unfoamed blend and nanocomposites).…”

Influence of Vinyl Acetate Content and Melt Flow Index of Ethylene-Vinyl Acetate Copolymer on Physico-Mechanical and Physico-Chemical Properties of Highly Filled Biocomposites

“…Copolymers have a number of advantages, for example, an ethylene-octene copolymer makes it possible to obtain composites filled with wood flour up to 70 wt.% [ 9 , 11 ]. It is known that ethylene-vinyl acetate copolymer (EVA) can be used as a compatibility agent to improve the adhesion of vegetable fillers to the polyethylene matrix [ 12 , 13 , 14 ]. For the industrial production of goods from such biocomposites, it is rational to use highly filled superconcentrates (or masterbatches) that the manufacturer of goods may add to pure polyethylene granules to obtain biocomposites with their required rheological and physico-mechanical parameters.…”

Mineral filler effect on mechanical and rheological properties of thermoplastic HDPE/barley straw composites

“…Most manufacturers prefer low-pressure polyethylene (HDPE), because of a relatively low cost and processing temperature of such WPC, as well as they are environmentally friendly and frost-resistant [18][19][20][21][22]. The low adhesion of these thermoplastic polymers to organic fillers makes it difficult to obtain WPC with a high level of technological and operational characteristics.…”