Synthesis and Mechanical Properties of Polyurea-Based Hybrid Composites for Ballistic Individual Protection

Abstract

During conûict situations, the combat staff is exposed to a wide variety of aggressions, such as temperature and pressure variations and dynamic impacts (from ammunition or fragments). Textiles used in the manufacture of the military uniforms and devices have always played an important role in defending the military against these hazards, and an adequate level of individual protection equipment is required. In this respect, novel fibre-reinforced polymer composite materials for military application, such as reducing blunt trauma for ballistic protection equipment, have been studied in terms of thermal and mechanical properties and ballistic protection, obtaining very good results.

Dynamic Tests on Polyurea-Based Hybrid Composites for Ballistic Protection

“…Due to the fact that these materials achieve the two-fold requirement, of low density and high strength, an important number of studies on epoxy-, vinyl esters-, phenolic resins-, polyesters-, polyureas-and urethanes-based materials for employment in ballistic protection field were performed [15][16]. The rationale of the present study was to focus on continuing previous tests of the research team [10][11], in correlation with state-of-theart findings regarding the dynamic behavior of polyurea [17][18].…”

“…The materials tested pursued the fabrication conditions detailed in [10,11]. Since the best results in terms of ballistic resistance were obtained by one specific composition of polyurea-based composite, that same composition was employed in the appropriate tests performed during the present study.…”

“…In previous studies, there was shown the importance of polymers in various military protection applications [1][2][3][4], and was demonstrated that the reinforcement of such polymers conducts to better composite materials, which possess higher strength and higher modulus [2,[5][6][7][8][9][10], in order to, e.g., reduce blunt trauma [10].…”

A Facile Synthesis Route of Hybrid Polyurea-Polyurethane-MWCNTs Nanocomposite Coatings for Ballistic Protection and Experimental Testing in Dynamic Regime

“…Therefore, in terms of ballistic protection, the efficacy of polyurea is already validated by an important volume of data available in the literature. Polyurea-MWCNTs systems [ 29 , 30 , 31 ] were also demonstrated in multiple studies as good candidates for impulsive loading applications. However, one major inconvenience is that the chemical modification of the nanofiller sometimes involves significant costs that may not prove to be economically viable.…”

Simulation of Thermal Transfer Through the Polyamide Intake Manifold

“…Composites are any combination of polymer matrix and fibrous reinforcement. Glass, carbon, aramid and other fibers provide strength and rigidity, while the polymer matrix (or resin) made of polyester, polyurethane, epoxy, polypropylene, nylon or other resin protects and transfers loads between fibers [3][4][5][6][7]. This creates a material with attributes superior to the polymer or fiber itself.…”