An innovative collaborative high-performance platform for simulation

This paper presents an innovative collaborative visualization platform for the simulation-based design applications. Following the scope and the main objectives, the general architecture based on the internet standard technologies is explained. Based on a multi-domain approach, several demonstrators are involved crossing interests of industrial and academic communities. Related to the field of process engineering, we adapt and deploy a web-based architecture research application on the targeted platform

Collaborative Exploration of 3D Scientific Data

International audienceThis demonstration introduces new ways for exploring Collaborative Virtual Environments (CVE) that contain 3D scientific data sets obtained by simulation. In order to make decisions accordingly to their collective knowledge and understanding of the simulation, the users must collaborate and share experiences and comments. We provide tools to enable a good coordination between the users, and to make each user aware of the activity of others. Each user can navigate within the CVE: change her own position, orientation and scale. Each user can also add annotations within the virtual universe. We propose several 3D layouts for the presentation of the data, associated with different 3D navigation tools. Consequently, the user can explore the data accoording to various parameters such as time or temperature. Last we propose a new 3D interaction tool, called 2D Cursor / 3D Pointer, dedicated to selection and manipulation of 3D objects, and application control. This 2D cursor is associated with a 3D geometry in order to make people aware of the activity of the users who are using this tool

Synthesis of novel vinylester from biobased phloroglucinol

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Synthesis of novel vinylester from dicyclopentadiene prepolymer

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Multi-functionalization of gallic acid. Synthesis of a novel bio-based epoxy resin

International audienceNovel biobased epoxy thermoset was synthesized from gallic acid, a phenolic acid encountered in various plants, both in its simple form and as a part of gallotannins. The functionalization of gallic acid was carried out using a two-step synthesis involving the allylation of OH groups followed by the epoxidation of resulting double bonds. The performance of two oxygen transfer agents (meta-chloroperbenzoic acid (mCPBA) and methyl(trifluoromethyl) dioxirane generated in situ from 1,1,1-trifluoroacetone and oxone) was evaluated in the epoxidation of the allylic double bonds. The glycidyl derivative of gallic acid (GEGA) obtained from mCPBA epoxidation was cured in epoxy polymer formulation with isophorone diamine (IPDA). The thermal and mechanical preliminary analyses showed that this new epoxy network based on GEGA displayed interesting properties compared to the epoxy polymer formulated with commercial diglycidyl ether of bisphenol A (DGEBA). A higher glass-transition temperature of GEGA/IPDA epoxy resin indicates a higher crosslinking density of this network

Synthesis and characterization of novel vinylester prepolymers from cardanol

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Procédé d'élaboration de nouvelles résines thermodurcissables à partir de composés phénoliques naturels,

L'invention concerne un procédé d'élaboration de résines thermodurcissables époxy à base de composés phénoliques naturels. Ces composés phénoliques naturels sont préalablement fonctionnalisés et activés pour qu'ils puissent êtres utilisés pour l'élaboration de résines

Procédé d'élaboration de nouvelles résines thermodurcissables à partir de composés phénoliques naturels,

L'invention concerne un procédé d'élaboration de résines thermodurcissables époxy à base de composés phénoliques naturels. Ces composés phénoliques naturels sont préalablement fonctionnalisés et activés pour qu'ils puissent êtres utilisés pour l'élaboration de résines

Synthesis and Properties of Biobased Epoxy Resins. Part 1. Glycidylation of Flavonoids by Epichlorohydrin

International audienceBiobased epoxy resins were synthesized from a catechin molecule, one of the repetitive units in natural flavonoid biopolymers also named condensed tannins. The reactivity of catechin toward epichlorohydrin to form glycidyl ether derivatives was studied using two model compounds, resorcinol and 4-methylcatechol, which represent the A and B rings of catechin, respectively. These model molecules clearly showed differences in reactivity upon glycidylation, explaining the results found with catechin monomer. The reaction products were characterized by both FTIR and NMR spectroscopy and chemical assay. The glycidyl ether of catechin (GEC) was successfully cured in various epoxy resin formulations. The GECs thermal properties showed that these new synthesized epoxy resins displayed interesting properties compared to the commercial diglycidyl ether of bisphenol A (DGEBA). For instance, when incorporated up to 50% into the DGEBA resin, GEC did not modify the glasstransition temperature. Epoxy resins formulated with GEC had slightly lower storage moduli but induced a decrease of the swelling percentage, suggesting that GEC-enhanced crosslinking in the epoxy resin networks