Effect of Nanofiller Dispersion on Morphology, Mechanical and Conducting Properties of Electroactive Shape Memory Poly(Urethane-Urea)/Functional Nanodiamond Composite

Abstract

In this attempt, segmented poly(urethane urea) was prepared from polycaprolactone triol (soft segment), 1,3- bis(isocyanatomethyl)cyclohexane (hard segment) and 4,5-diaminophthalonitrile (chain extender). Acidfunctionalized nano-diamond was used as nano-filler. The nanocomposites were processed using solution casting and melt blending. Unique morphology was observed by SEM due to generation of crosslinked polyurethane and ND network. The s-PUU/ND 10 depicted 6 % increase in tensile strength compared with m-PUU/ND 10. 10 wt. % ND loading via solution route increased conductivity to 0.089 Scm-1 relative to m-PUU/ND 10 (0.057 Scm-1). Electrical conductivity of nanocomposites was enough to show electroactive shape recovery of 95 % (40 V).

Structure and Properties of Polyacrylonitrile/Polystyrene and Carbon Nanoparticle-Based Nanocomposite Foams

“…In this way, there was 51% increase in the compression strength of 3 wt.% foam compared with the neat polymer foam. The effect of nanocarbon nanofillers has already been observed for enhanced strength properties [25,26]. Similar increasing trend was observed for the compression modulus of nanocomposite foams.…”

Composites of Semi-Rigid Polyurethane Foams with Keratin Fibers Derived from Poultry Feathers and Flame Retardant Additives

“…The introduction of fire retardants impedes the thermal decomposition and ignition of the polymer, creating a coating on its surface, additional bonds or decomposing with the release of non-flammable gases or taking a significant amount of heat during the decomposition. These phenomena create a barrier for the fire, flammable gases and oxygen from air, the combustion mechanism changes, the amount of flammable gases decreases, the flammability of products surface decreases, the layers absorb heat, non-flammable gases are released (e.g., water vapor), the inflammation time lengthens [ 17 ].…”

Polycarbonate/Polypropylene-Graft-Maleic Anhydride and Nano-Zeolite-Based Nanocomposite Membrane: Mechanical and Gas Separation Performance

“…However, miscible polymer blends may engender high performance materials with unique properties and processability. Polymer blends have been prepared using variety of engineering resins and techniques, focusing wide range of applications [1,2]. As polymer blends are multi-phase systems, they may form different morphological structures such as fibres, spheres, ribbons, plates, cylindrical and other structures.…”