Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites

Abstract

In this work, polyaniline (PANI) in emeraldine-base form, synthesized by chemical oxidation polymerization, was protonated with hydrochloric acid (HCl). Composites based on high-density polyethylene (HDPE) and linear-low density polyethylene (LLDPE) blends with PANI were prepared in molten condition using a torque rheometer. The effect of compatibilizer agent (maleic anhydridegrafted high density polyethylene, HDPE-g-MA) and different contents of PANI on the blends-based composites was also investigated. Thermal, mechanical, and electromagnetic (electric permittivity) measurements and morphological aspects of the composites were evaluated. The addition of PANI content in the composites decreases the degree of crystallinity of HDPE and LLDPE blends, which implies that PANI particles make it difficult for co-crystallization to occur in the HDPE and LLDPE, respectively. On the other hand, the addition of compatibilizer agent in the HDPE and LLDPE blends increased the degree of crystallinity. The complex parameters of permittivity in the frequency range of 8.2 to 12.4 GHz varied as a function of the PANI content in the blend. It was also observed that the compatibilizer agent increased the composite stiffness and decreased the electric permittivity values. This result shows that the increasing rigidity of the molecular structure of the polyethylene matrix hindered the dissipation of the electromagnetic energy in the sample.

Effect of conductive polyaniline in thermoplastic natural rubber blends on the mechanical, thermal stability, and electrical conductivity properties

“…Recently, the research work showed that the incorporation of compatiblizer, that is, maleic anhydride-grafted HDPE in the HDPE/LLDPE/PANI blend enhanced the homogeneity and the dispersion of PANI in compounds as well as the interaction between matrix and PANI, thereby increasing the stiffness of the compounds which in turn to the decrement in electric permittivity. 22 If the miscibility between the PANI and the polymeric matrix is well-controlled, this mixture has potential technological applications such as sensor and electronic devices. 22 In this study, a new and easy approach of processing the PANI with the conventional polymers was developed.…”

“…22 If the miscibility between the PANI and the polymeric matrix is well-controlled, this mixture has potential technological applications such as sensor and electronic devices. 22 In this study, a new and easy approach of processing the PANI with the conventional polymers was developed. The LNR was used as a carrier and compatibilizer in NR/LLDPE/PANI in order to improve the compound miscibility.…”

“…reported the increase in mechanical and conductivity properties of PE/PANI blends when the hydrogen bonding was formed between the PANI and the added compatibilizer (‐OH and ‐COOH functionalized PE). Recently, the research work showed that the incorporation of compatiblizer, that is, maleic anhydride‐grafted HDPE in the HDPE/LLDPE/PANI blend enhanced the homogeneity and the dispersion of PANI in compounds as well as the interaction between matrix and PANI, thereby increasing the stiffness of the compounds which in turn to the decrement in electric permittivity . If the miscibility between the PANI and the polymeric matrix is well‐controlled, this mixture has potential technological applications such as sensor and electronic devices …”

Antibacterial Performance of Protonated Polyaniline-Integrated Polyester Fabrics

“…During the immersion process in undoped PANI, the fabric turned a blue color (Figure 1B). This blue-colored PANI portrays the deprotonated state (emeraldine base), which is considered a non-conductive state [29][30][31]. Meanwhile, as shown in Figure 1C, immersion in PANI doped with pTSA produced green fabric.…”