Conductivity enhancement of poly-ether-ether-ketone by ion implantation

Abstract

Articles you may be interested inDielectric characteristics of poly(ether ketone ketone) for high temperature capacitive energy storage Appl. Phys. Lett. 95, 022902 (2009); Molecular dynamics and microstructure development during cold crystallization in poly(ether-ether-ketone) as revealed by real time dielectric and x-ray methods Relaxation behavior in model compounds of poly(aryl-ether-ketone-ketone) as revealed by dielectric spectroscopy Effects of the lowsurfaceenergy component on the viscosity of poly(ether ether ketone) and polytetrafluoroethylene blendsAmorphous poly-ether-ether-ketone (PEEK) films have been implanted with a variety of ions (He, N, F, As, Xe and I) in the energy range 50 keY to 32 MeV. At the lower end of this range, the dependence of the electrical conductivity of the PEEK on the dose and ion species has been explained in terms of a simple model of electronic and nuclear excitation effects. Implantations in the MeV energy range yielded a surface layer on the PEEK with a high conductivity [up to 2.5 (n cm) -I] and a moderate hardness (320 knoop, 1-g load). Evidence for diffusion of iodine implanted at the highest energy has been found. The role of the uniform iodine concentration throughout the implanted layer in the prevalent conduction mechanism is not known at present.

Chemical aspects of implantation of high-energy ions into polymeric materials

“…In some instances the microhardness of the irradiated surface can be substantially increased (up to 50 to 70 times 122 ± 126 ). These effects were observed for various polymers, namely, polyimide, 28,123,126 polystyrene, 122,123 polyethylene, 92,127 129 and some other polymers irradiated with different (mostly light and not too heavy) ions with energies ranging from 100 keV to 1 MeV. The microhardness of carbonaceous products is first of all determined by the character of interconnectivity within the carbon cluster aggregates.…”

“…Therefore the conductivity, which is proportional to the optical absorption of the carbonaceous phase, 131 only indirectly depends on the nature of implanted ions, being mainly determined by the energy loss during the stopping of ions. 1,17,21,129 Since the conducting phase in the ionimplanted layer is formed by discrete carbon clusters and their associates, the onset of conductivity in an irradiated polymer upon build up of implantation dose has a threshold character (see Fig. 3) and the transition from dielectric to conductor can be considered as percolation transition.…”

High electronic excitation induced modifications by 100MeV O7+ and 150MeV Ni11+ ions in Makrofol KG polycarbonate film

“…It is well reported in literature that ion implantation may reduce the crystallinity, induce cross-linking and produces carbonyl groups on the polymers [16][17][18][19], which results in polymer degradation. Most studies in the field have shown significant surface carbonization and splitting of chemical bonds on the side of the polymer chain in ion implanted polymers [20][21][22]. Polymer chain splitting was reported for polymers implanted with ions [23,24].…”

Effect of ion beam irradiation on metal particle doped polymer composites

“…Thus, optical, mechanical, electrical and chemical properties can be selectively modified using ion beam bombardment (Solfield et al 1993;Vacik et al 1997). Ion irradiation of polymer is followed by the processes of macromolecular distribution, cross-linking, free radicals formation, carbonization and oxidation (Bedell et al 1990;Hnatowicz et al 1994). Therefore, understanding of certain structural rearrangements of the polymer composites opens a way to design devices with required parameters.…”