The viscoelastic properties of modified thermoplastic impregnated multiaxial aramid fabrics

Abstract

This study reports the manufacture of new fabric forms from the preparation of hybrid laminated multiaxial composites with enhanced thermo‐mechanical properties. Thermal and dynamic mechanical analysis of polymer matrix films and fabricated hybrid composites were used to determine the optimal material composition and reinforcement content for composites with improved viscoelastic properties. The introduction of 5 wt% silica nanoparticles in a composite of p‐aramid–poly(vinyl butyral) led to significant improvements in the mechanical properties, and the addition of silane coupling agents yielded maximal values of the storage modulus for hybrid nanocomposites. The introduction of silane led to a better dispersion and deagglomeration of SiO2 particles, and to the formation of chemical bonds between organic and inorganic constituents, or p‐aramid–poly(vinyl butyral) composites. In this way, the mobility of macromolecules was reduced, which can be seen from the decreasing value of damping factor for the p‐aramid–poly(vinyl butyral) composite. Analysis of the glass transition temperature of the composite with amino‐functionalized silica nanoparticles revealed improved thermal stability in addition to the aforementioned mechanical properties of the tested materials. POLYM. COMPOS., 2012. © 2011 Society of Plastics Engineers

Mechanical and anti‐stabbing properties of modified thermoplastic polymers impregnated multiaxial p‐aramid fabrics

“…an increase of 86% in comparison to the E ′of PU/aramid/PVB. The sample of the PU/aramid/PVB shows the E ′ increase by 38% compared to the sample of aramid/PVB which indicates a high adhesion by bonding PU/PVB polymer matrix trough a hydroxyl group of PVB reacting chemically with an isocyanate group (see Scheme ). Two glass transitions temperature ( T g ) can be seen in Fig.…”

“…Additionally, a polymer powder, PVB (Mowital B75H, Kuraray Specialities Europe), was used for polymer matrix. The functionalization of silica nanoparticles using AMEO silane is reported in our previous paper . The process of hydrolysis and silanol (Si–OH) formation lasted around 10 min at 2 wt.% silane content.…”

Properties of bamboo flour/high‐density polyethylene composites reinforced with ultrahigh molecular weight polyethylene

“…Figure shows the FTIR spectra of bamboo powder/HDPE composites with different UHMWPE contents. The peak around 3420 cm −1 could be assigned to the hydroxyl groups . Peaks at 2850 cm −1 –2963 cm −1 were due to the stretching vibrations of saturated hydrocarbons (CH).…”

Aramid composites impregnated with different reinforcement: Nanofibers, nanoparticles and nanotubes

“…Ceramics have usually been used as reinforcement in the body armour owing to its properties, such as introducing flexibility and light weight of the overall fabric structure [8]. The addition of the nanoscale ceramic reinforcement to polymer matrices improves the mechanical properties, notably compared to the pure matrix material in the body armour [9]. Among this ceramics, nanosilica is one of the primary nanofillers used in polymer composites.…”