Influence of carbon black properties on the Joule heating stimulated shape‐memory behavior of filledethylene‐1‐octene copolymer

Abstract

The shape‐memory (SM) behavior of ethylene‐1‐octene copolymer (EOC) reinforced by carbon black (CB) was investigated. Two CB types, N110 and EC600, with different structure and specific surface area were used as conductive fillers. The mechanical tests showed that on addition of CB into EOC, modulus and strength increased significantly for both CB types but the elastic behavior stands on. The electrical resistivity decreases drastically with increasing CB content. The thermally stimulated SM recovery is deteriorated significantly because of the rigid CB network formed in EOC. With increasing temperature, the CB network gradually loses its rigidity, as the glassy polymer layers connecting the CB aggregates become softened. As a result, the samples with high CB content could recover nearly 100%. In this work, a sample preparation and a corresponding arrangement of experiment were introduced, which allows to quantify the Joule heating stimulated recovery behavior. EOC containing 17 wt% CB EC600 reaches a low resistivity of 8 Ω cm and shows good Joule heating stimulated SM recovery of up to 97% at a voltage of 15 V. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

Phase changing stearate ions as active fillers in multifunctional carboxylated acrylonitrile–butadiene composite: Exploring the role of zinc stearate

“…Rectangular specimens with dimensions 40 × 10 × 0.5 mm 3 were prepared for shape recovery experiments under bending mode . To make a circular temporary shape, the rubber samples were wrapped around a metallic pipe using a duct tape.…”

Synergistic effect of siloxane modified aluminum nanopowders and carbon fiber on electrothermal efficiency of polymeric shape memory nanocomposite

“…Thermally stimuli-responsive SME in SMPs have also been achieved using photoactive, magnetic-active, water (or solvent)-active and electro-active approaches [22,[29][30][31][32]. Utilization of electrically resistive heating to trigger the SME in the SMPs is desirable and convenient to apply in a number of practical applications, especially where directly thermal heating is not easily achieved [33][34][35][36][37]. A variety of conductive ingredients have been added into the insulating SMP matrix to enable remote actuation of shape recovery M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 via the electrically resistive heating [38][39][40].…”

Functionally graded carbon nanotube and nafion/silica nanofibre for electrical actuation of carbon fibre reinforced shape memory polymer

“…Therefore, a great number of research works have been carried out to achieve the electrical actuation of SMPs (Lu et al, 2009;Lu et al, 2010;Luo and Mather, 2010;Le et al, 2011;Lu et al, 2011b;Lu et al, 2011a;Fejos et al, 2012;Lu, 2012a;Lu, 2012b;Fejos and Karger-Kocsis, 2013;Lu et al, 2013;Lu et al, 2013c;Lu et al, 2014b). In practice, the use of a variety of electrically conductive filler is essential for the electrically conductive SMP composites due to the fact that most pristine SMPs are inertness to electricity.…”