Bondues, France
Bondues, France

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Riechers J.,Herrenknecht Formwork Technology GmbH | Lueghamer A.,AGRU Kunststofftechnik GmbH | Recher G.,Telene SAS
ITA-AITES World Tunnel Congress 2016, WTC 2016 | Year: 2016

Despite comparable standards with regards to protective membranes and gaskets, specified in tender documents, different methodologies are known and in use for protection and hydraulically optimization of segmental lined tunnels, achievable in two passes or one pass. Based on detailed monitoring of key materials and systems involved, the combi segments type II HDPE, an adaptable protective system for constructions on one pass, has been developed. The objection of this paper was to discuss this integral protective lining system in respect of material characteristics and its adaptability to both project and customers' demands. Reviewed performances show outstanding capabilities of the Liner System and its potential for future feature extensions. After realization of first reference projects applying the new combi segments lining panels, further publications will follow including practical experience reports of panel fabrication, segment production and tunnel installation. Copyright © (2016) by the Society for Mining, Metallurgy and Exploration. All rights reserved.


Monsaert S.,Ghent University | Ledoux N.,Ghent University | Drozdzak R.,Telene SAS | Verpoort F.,Ghent University
Journal of Polymer Science, Part A: Polymer Chemistry | Year: 2010

A ruthenium Schiff base catalyst (5), bearing an Nheterocyclic carbene ligand, was found to be a latent catalyst for the ring-opening metathesis polymerization of cis,cis-1,5- cyclooctadiene and dicyclopentadiene and is activated efficiently on addition of hydrochloric acid. A benchmark study was performed using the Grubbs first (1), second (2), and third (3) generation catalyst. Results further illustrate that the catalyst can be stored in dicyclopentadiene at a monomer/catalyst ratio of 15,000/1 without any significant polymerization during at least 12 months. After activation of the catalyst with a Brønsted acid, no undesired loss of performance can be detected. This concept of activation can be easily adapted to a Reaction Injection Molding process, and reaction control is obtained via the in situ generation of the cocatalyst as the outcome of the reaction of alcohols with Lewis acids. Insight into the activation mechanism was gained through an in-depth nuclear magnetic resonance study, and a plausible mechanism is proposed. © 2009 Wiley Periodicals, Inc.


Le Gac P.Y.,French Research Institute for Exploitation of the Sea | Choqueuse D.,French Research Institute for Exploitation of the Sea | Paris M.,University of Nantes | Recher G.,TELENE SAS | And 2 more authors.
Polymer Degradation and Stability | Year: 2013

In the offshore industry polymer coatings are widely used to ensure thermal insulation of steel pipes, and to avoid over-cooling of the hot oil inside. Because of very severe service conditions (i.e. high temperature, high pressure and presence of seawater) and an expected life time of 20 years, durability of these coatings is a major issue for this industry. Polypropylene and polyurethane are often used for this application, nevertheless these polymers have some limitations in terms of processing time for polypropylene and maximum service temperature for polyurethane. Polycyclopentadiene (pDCPD) shows good processing characteristics and low thermal conductivity, so this polymer could be a good alternative coating in the offshore industry, but the durability of this polymer under offshore conditions is unknown. This paper present results from an accelerated ageing study of pDCPD in seawater at temperatures from 90 °C to 180 °C for 18 months. Polymer evolution during ageing is characterized using both mechanical (tensile test and DMA) and chemical (FTIR, NMR) analyses. For ageing at temperatures below Tg (i.e. 155 °C) the only degradation mechanism is oxidation, whereas for ageing temperatures above Tg secondary polymerization process of the material is observed. © 2013 Elsevier Ltd. All rights reserved.


The invention relates to a process for the preparation of bidentate Schiff base catalysts containing a salicylaldimine-type ligand.


The present invention relates to a catalytic complex for olefin metathesis reactions, to a process for its preparation and to its use in olefin metathesis reactions, particularly in ring opening metathesis polymerisation (ROMP) reactions.


Patent
Telene SAS | Date: 2012-06-06

The present invention relates to a catalytic system comprising a precatalyst, a precatalyst activator and an inhibitor. Further, the invention relates to the use of this catalytic system in ring-opening metathesis polymerisation reactions.


The invention relates to a process for the preparation of bidentate Schiff base catalysts containing a salicylaldimine-type ligand.


There is provided a curable composition comprising (A) a cyclic olefin; (B) a metathesis catalyst for polymerizing the cyclic olefin; (C) 0.1 - 30 wt.% of a compound comprising at least one vinyl group; and (D) 0.1-10 wt. % of a curing agent for compound (C), wherein the wt. % are relative to the total weight of the composition. The composition provides a desirable combination of workability, toughness and heat resistance. Also provided is a molded article comprising the composition and reinforcing fibers, and a method of manufacturing the same.


The present invention relates to a catalytic complex for olefin metathesis reactions, to a process for its preparation and to its use in olefin metathesis reactions, particularly in ring opening metathesis polymerisation (ROMP) reactions.


News Article | January 4, 2016
Site: www.materialstoday.com

An impact resistance and fatigue-testing study reports that Telene, a thermoset polydicyclopentadiene (PDCPD), used as a matrix in a glass fiber composite, demonstrated improved impact strength and fatigue resistance for products subject to high stress factors. The study, released by the Department of Materials Engineering at the University of Leuven, Belgium, found that Telene exhibited 50% greater resistance in impact testing and four times longer life in fatigue testing than epoxy samples did, while maintaining the same overall tensile strength.    The study compared Telene alongside an equivalent epoxy composite commonly used in the laminate process. While the epoxy-based laminates used with glass fibers exhibited revealed early local damage and loss of mechanical properties, Telene reportedly retained its mechanical characteristics throughout the extended testing protocol, until break. An abstract and the full study are available from Science Direct. This story is reprinted from material from Telene, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier. 

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