REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

BALLISTIC RESISTANCE OF NANOMODIFIED HYBRID THERMOPLASTIC COMPOSITES

VERA OBRADOVIĆ

Faculty of Technology and Metallurgy, University of Belgrade, vobradovic@tmf.bg.ac.rs

DUŠICA B. STOJANOVIĆ

Faculty of Technology and Metallurgy, University of Belgrade, duca@tmf.bg.ac.rs

IRENA ŽIVKOVIĆ

Faculty of Technology and Metallurgy, University of Belgrade, zirena@tmf.bg.ac.rs

RADMILA JANČIĆ HAJNEMAN

Faculty of Technology and Metallurgy, University of Belgrade, radica@tmf.bg.ac.rs

VESNA RADOJEVIĆ

Faculty of Technology and Metallurgy, University of Belgrade, vesnar@tmf.bg.ac.rs

PETAR S. USKOKOVIĆ

Faculty of Technology and Metallurgy, University of Belgrade, puskokovic@tmf.bg.ac.rs

RADOSLAV ALEKSIĆ

Faculty of Technology and Metallurgy, University of Belgrade, aleksic@tmf.bg.ac.rs

Abstract: The resistance to penetration of a shot bullet was tested for four samples of composite fabric forms. Each sample consisted of 16-17 pieces of fabrics which contained four layers of polyurethane placed between aramid fibers. All the fabrics were coated with γ-aminopropyl triethoxysilane (AMEO silane)/ethanol solution. There were two samples coated with poly (vinyl butyral) (PVB)/ethanol solution and the other two were coated with the same solution but with the addition of 30 wt.% AMEO silane modified silica nanoparticles which were reinforcements. The samples were both hard and flexible option. The bullet-shooting test was applied to all the composites by two different bullets. Structural design of the samples improved the ballistic resistance after the bullets were shot. Some ballistic image analyses for print and indentation depth of the samples were performed in Image Pro-Plus software.

Key words: polyurethane/aramid fabrics, poly (vinyl butyral), modified silica nanoparticles, ballistic test, Image Pro-Plus software.