• Katheria, Ankur
• Banerji, Pallab
• Das, Narayan Ch.
• Choudhury, Sreeja Nath
• Nayak, Jasomati
• Pal, Aparajita
• Das, Palash

Abstract

<jats:title>Abstract</jats:title><jats:p>The selective distribution of filler within polymer blends presents a compelling advantage, notably manifesting as a reduced percolation threshold when compared to an individual polymer matrix with a random filler dispersion. In this context, a thermoplastic elastomeric (TPE) blend comprising ethylene propylene diene rubber (EPDM) and linear low-density polyethylene (LLDPE), denoted as EL, has been meticulously formulated. The incorporation of varying amounts of conductive carbon black (Vulcan XC 72; VCB) into this TPE matrix has been achieved through conventional melt blending, yielding a composite material with exceptional electromagnetic interference (EMI) shielding effectiveness of -27.80 dB at 50 phr (parts per hundred rubber). This success is credited to the creation of a linked structure resulting from a dual-step percolation process. The selective distribution of carbon black (CB) throughout the TPE mixture results in a decreased critical concentration for connectivity and enhanced electromagnetic interference (EMI) shielding performance. This advancement underscores the potential of EPDM-LLDPE-VCB (ELV) composites to safeguard against electromagnetic radiation. It paves the way for their utilization in various techno-commercial applications, where a balance of mechanical strength, thermal stability, and flexibility is crucial.</jats:p><jats:p><jats:bold>Graphical Abstract</jats:bold></jats:p>

Topics

• density
• impedance spectroscopy
• dispersion
• Carbon
• melt
• strength
• composite
• random
• thermoplastic
• rubber
• polymer blend