Abstract
The aim of this paper is to investigate the mechanical properties of hybrid composites with the polymer matrix of the copolymer of ethylene and vinyl acetate (EVA), ultra high molecular weight polyethylene fibers (UHMWPE) and particles based on aluminum oxide. Commercial aluminum oxide nanoparticles and aluminum oxide particles obtained by sol-gel technique were used as fillers in a proportion of 1, 3 and 5 wt. %. Infrared spectroscopy with Fourier Transformation (FTIR) and Scanning Electron Microscopy (SEM) were used to test the chemical structure and microstructure of hybrid composites, respectively. The tensile test showed an increase in the modulus of elasticity and the tensile strength of the obtained hybrid composites. The results of the sample testing showed that the best mechanical properties and toughness of the material shows hybrid composites with 1 mass. % micron particles of aluminum oxide.
Highlights
Kako bi se videli mehanizmi koji vladaju prilikom opterećivanja hibridnih kompozita, ispitivana je mikrostruktura preloma nakon ispitivanja na zatezanje, slika 6
The results of the sample testing showed that the best mechanical properties and toughness of the material shows hybrid composites with 1 mass
Summary
Polietilenska vlakna, korišćena kao ojačanje, su UHMWPE – DSM Dyneema, Holandija (SK75; prečnika 20 mm; gustine 0,970 gcm-3). Kao polimerna matrica izabran je komercijalni EVA kopolimer (Elvax®410) proizvođača DuPontTM, koji sadrži 18 mas. Toluen (proizvođača Zorka Šabac) korišćen je kao rastvarač. Nanočestice aluminijum oksida (γ faza, prečnika
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