Larche J.-F.,Nexans A/S |
Gallot G.,Nexans A/S |
Boudiaf-Lomri L.,Nexans A/S |
Poulard C.,Nexans A/S |
And 2 more authors.
Polymer Degradation and Stability | Year: 2014
This paper is devoted to the photo-oxidation of a fire retardant polymer used for cable jacketing and an emphasis was put on understanding how highly filled composites (Ethylene-Vinyl Acetate filled with Aluminium Tri-Hydroxide) behave under UV irradiation. Samples have been irradiated during several thousand hours and the degradation has been studied at the surface but also within the polymer bulk. The degradation of the polymer part, because of a massive chain scissions process, leads to a progressive enrichment of the inorganic part at the surface which then acts as a screen for the bulk. Thus, the degradation is very heterogeneous along the polymer thickness and the degradation profiles well correlate with the evolutions of the mechanical properties (i.e. mechanical properties are not influenced if the degradation profile remains small compared with the total sample thickness). © 2014 Elsevier B.V. All rights reserved.
Calvo Gonzalez E.,Nexans Research Center |
Gonnet J.-M.,Nexans Research Center
Society of Plastics Engineers - EUROTEC 2011 Conference Proceedings | Year: 2011
In cable industry, the ease with which a piece of jacket can be removed (stripped) from insulated multi-wires is called strippability. A low stripe force is not only requested by customers and installers but it also makes the cable more flexible. The purpose of this paper is to present a method based on numerical approach to reduce the stripe force for a cable during extrusion. A correlation between the numerical parameter (pressure applied around the wires) and the stripe force measured on samples has been demonstrated afterwards it is used to design future extrusion pressure tooling.
Ahn D.U.,Nexans Research Center |
Jeon J.-B.,Nexans Research Center |
Kim S.-J.,Nexans Research Center
RSC Advances | Year: 2015
We report on the synergistic binary combination of amphiphilic fatty acids and their derivatives (FADs), which remarkably enhance the mechanical and thermal properties of cross-linked ethylene-propylene-diene monomer (EPDM)-organoclay nanocomposite as well as the melt processability of its non-crosslinked counterpart. The binary FAD mixture is composed of a stearic acid derivative (SAD) that preferentially increases the gallery gap of organoclays and a vegetable oil that mainly improves the dispersion of SAD-modified organoclays in the rubber matrix. The synergism between two FADs increases as both FAD components become more compatible with rubber matrix within the limit that the SAD component has a good affinity to organoclay enough to infiltrate into the gallery gap of organoclay and wet the surface of organoclay. Such outstanding performance enhancement has been achieved even at a very low loading level of organoclay simply by the incorporation of a suitable mixture of commercial-grade FADs during the traditional rubber compounding process. Therefore, we illustrate a novel and facile method to prepare a high-performance rubber nanocomposite with wide-ranging commercial benefits, without compromising the intrinsic advantages of rubber materials such as lightweight, optical transparency, high ductility and flexibility. © The Royal Society of Chemistry 2015.