Influence of PANI‐complex on the mechanical and electrical properties of carbon fiber reinforced polypropylene composites

Abstract

The aim of this work was to determine the influence of PANI-complex on the mechanical and electrical properties of CF-PP composites. As expected, an increase in tensile strength and modulus of the PP matrix could be achieved with an increasing fiber weight fraction. On the other hand, the PANI-complex decreased the tensile strength and modulus of the fiber reinforced composites; however, these values remained on a better level than the value of the neat PP. Further, by using a long carbon fiber (LCF) reinforcement instead of short carbon fibers (SCF) the percolation threshold was moved towards a lower fiber weight content. In addition, a synergy effect between PANI-complex and LCF in the PP-matrix regarding the electrical properties occurred. In particular, an abrupt decrease in the surface resistivity could be avoided. Also, the surface resistivity of a blend is better when the blend consists of both PANI-complex and E F instead of only one of these fillers.

Melt rheology of polypropylene reinforced with polyaniline‐coated short glass fibers

“…The fracture in all cases occurs by pull-out of the fibers because of the low interfacial adhesion between the surface of the fibers and the polymer matrix, in agreement with previous results from our group 16 and others. 20 In addition, Figure 1(c) shows several side-by-side fibers, which indicate that at 30 wt % concentration the fibers start to aggregate, increasing the electrical conductivity of the composite by a percolation process. 16 On the other hand, Figure 1(d) shows the fracture surface of the composite with 30 wt % of PAn-SGF and 5% of the PP-gMA, which now involves extensive fiber breakage, suggesting an increment in interfacial adhesion.…”

“…15,16 Polyaniline, an intrinsically conductive polymer, has been increasingly employed in the preparation of thermoplastics-based composites for electromagnetic shielding or antistatic applications. [17][18][19][20][21][22][23] The great potential of this polymer in the aforesaid applications is due to its environmental stability, relatively high electrical conductivity and low-cost synthetic route. 24 However, the addition of PAn to polymer matrices usually results in a loss or degradation of mechanical properties, compromising the performance of these composites.…”

Electrically conducting polypropylene/polyaniline‐grafted‐short glass fiber composites: Microstructure and dynamic mechanical analysis

“…In this study, we used a novel electrically conductive reinforced composite, isotactic polypropylene (iPP) reinforced with short glass fibers (SGF) which are coated with polyaniline (PAn) [15, 16]. Polyaniline, an intrinsically conductive polymer, has been increasingly used in the preparation of thermoplastics‐based composites for electromagnetic shielding or antistatic applications [17–23]. The great potential of this polymer in the aforesaid applications is due to its environmental stability, relatively high electrical conductivity, and low‐cost synthetic route [24].…”

Mechanical properties and fracture behavior of polypropylene reinforced with polyaniline‐grafted short glass fibers

“…To use them as dissipative materials for ESD shielding, their electrical conductivity has to be between 10 −11 and 10 −4 S/cm (ANSI/EIA‐541). Polyaniline (PAn) has been increasingly studied in recent years, being one of the most promising electrically conducting polymers because of its high polymerization yield, good environmental stability combined with moderate electrical conductivity, and relatively low cost 1–7. However, blends of PAn with thermoplastics usually show decreases in the mechanical properties, and this makes them unsuitable for manufacturing strong devices with the aforementioned ESD and EMI protection properties.…”