An impact way beyond its small market share / Claus-Peter keller in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 9 (2020)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 9 (2020) . - p. 44-47 Titre : An impact way beyond its small market share : Fluoropolastics improve the durability and chemical resistance of products Type de document : texte imprimé Auteurs : Claus-Peter keller, Auteur Année de publication : 2020 Article en page(s) : p. 44-47 Langues : Anglais (eng) Catégories : Copolymère éthylène tétrafluoroéthylène Durée de vie (Ingénierie) Emballages en matières plastiques Fluoropolymères Polytétrafluoréthylène Résistance chimique Stratifiés Index. décimale : 668.4 Plastiques, vinyles Résumé : Although fluoroplastics only make up a very small part of the overall plastics market, they are an indispensable component of many applications. These materials play a central role in today's megatrends of digitalization, clean-energy generation and modern mobility concepts. Note de contenu : - High performance applications - More light permeable than glass, PE and PC - CCL improve signal transmission - Fluoropolymers-based composites - Figure : 44© Carl Hanser Verlag, Munich Kunststoffeinternational 9/2020FLUOROPLASTICS Trend ReportThe roof of the Vitam leisure center in Neydens, France, is made from ETFE film. A wooden structure supports the 53 ETFE cushions with a total sur-face area of 4300 m2 - Fig. 1 : Consumption of PTFE in 2019 in Western Europe by industry - Fig. 2 : Fluoroplastics are often used as chemical- and temperature-resistant tank linings for the chemical, pharmaceutical and semi-conductor industry - Fig. 3 : ETFE greenhouse films are long-lasting and can promote plant growth. The greenhouse in the picture has a surface area of 5000 m2 and has been covered with a single-layer F-Clean film - Fig. 4 : Copper-clad laminates (CCL) are some of the most interesting applications of fluoroplastics. They are used above all in the antenna technology of 5G transmission and receiver stations and cable technology En ligne : https://drive.google.com/file/d/1_VGJ9tZsOF5_Cdwec-0hfS_m8oe6zYsx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34829 [article]

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Rheology and foaming of long-chain branched ethylene-tetrafluoroethylene copolymer and its blends / E. Nishi in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 2 (05/2018)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 2 (05/2018) . - p. 217-225 Titre : Rheology and foaming of long-chain branched ethylene-tetrafluoroethylene copolymer and its blends Type de document : texte imprimé Auteurs : E. Nishi, Auteur ; T. Satou, Auteur ; S. K. Sukumaran, Auteur ; T. Katou, Auteur ; Masataka Sugimoto, Auteur ; K. Koyama, Auteur Année de publication : 2018 Article en page(s) : p. 217-225 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère éthylène tétrafluoroéthylène Etat fondu (matériaux) Moussage (chimie) Mousse (chimie) -- Analyse Mousses plastiques Polyaddition Polymères ramifiés Rhéologie Index. décimale : 668.4 Plastiques, vinyles Résumé : The long-chain branched ethylene-tetrafluoroethylene copolymer (B-ETFE) was synthesized by radical polymerization using ethylene, tetrafluoroethylene, termonomer, and a very small amount of divinyl monomer. We studied melt rheology under shear and elongational flow, and foamability for B-ETFE, comparing with conventional linear ETFE. Addition of a small amount of the divinyl monomer had a considerable impact on the melt rheology of ETFE and its blends. The observed non-linear elongational behavior and emergence of long relaxation time components can be explained by long-chain branching in the modified ETFE. B-ETFE and its blends showed excellent foaming processability: uniform and smaller cell sizes and much higher cell number densities than those of linear ETFE. To the best of our knowledge, this is the first report of the enhancement of the melt rheology of ETFE from the viewpoint of modification of its molecular architecture. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - Uniaxial elongational measuremements - Batch foaming - Foam analysis - RESULTS AND DISCUSSION : Dynamic viscoelasticity - Uniaxial elongational viscosity - Strain hardening degree (SH) - Mooney-Rivlin model - Batch foaming of modified ETFE DOI : 10.3139/217.3468 En ligne : https://drive.google.com/file/d/1_dZlA4qpBhE0bKApnxOyFiTAGcEmEm-0/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30570 [article]

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