Impact testing with controlled energy of multiaxial aramid fabrics with various types of reinforcement

Abstract

The physical and mechanical properties of the six samples of polyurethane/p-aramid multiaxial fabric forms (Kolon fabrics) were analyzed by high speed impact tester. The samples were impregnated with 10 wt.% poly (vinyl butyral) (PVB)/ethanol solution and modified with γ-aminopropyltriethoxysilane (AMEO silane)/ethanol solution. Unmodified silica (SiO2) nanoparticles, tungsten disulfide (WS2) nanoparticles and multiwalled carbon nanotubes (MWCNT) were used as reinforcement for multiaxial Kolon fabrics. The SiO2/PVB mass fraction was 10 wt.%, while the WS2/PVB and MWCNT/PVB mass fractions were the same - 1 wt.%. The results revealed the increase of the maximal impact force and the total energy absorbed for all the samples compared to the unmodified Kolon fabric sample and the application possibilities of these materials for the antiballistic protection.

Fizička i mehanička svojstva šest uzoraka poliuretan/p-aramidnih multiaksijalnih tkanina (Kolon lamina) su analizirana pomoću impakt tester uređaja. Uzorci su impregnisani sa 10 mas.% rastvorom poli (vinil butiral)(PVB)/etanol i modifikovani 2 mas.% rastvorom γ-aminopropiltrietoksisilana (AMEO silan) u etanolu. Nemodifikovane silika (SiO2) nanočestice, volfram disulfid (WS2) nanočestice i višeslojne ugljenične nanocevi (MWCNT) su korišćene kao ojačanja multiaksijalnih Kolon lamina. Maseni udeo ojačanja SiO2/PVB je bio 10 mas.%, dok su maseni udeli WS2/PVB i MWCNT/PVB bili 1 mas.%. Rezultati pokazuju povećanje maksimalne udarne sile i ukupne apsorbovane energije kod svih uzoraka u odnosu na nemodifikovani Kolon uzorak i mogućnosti primene ovih materijala za antibalističku zaštitu.