Drivers of electromobility / Yu Bin in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 2 (02/2020)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 2 (02/2020) . - p. 8-13 Titre : Drivers of electromobility : Flame retardancy, heat and tracking resistance of electric vehicles Type de document : texte imprimé Auteurs : Yu Bin, Auteur ; Tamim Sidiki, Auteur ; David Zhu, Auteur Année de publication : 2020 Article en page(s) : p. 8-13 Langues : Anglais (eng) Catégories : Batteries électriques Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Matières plastiques dans les automobiles Polyamide 6 Polyamide 66 Polymères ignifuges Résistance thermique Véhicules électriques Index. décimale : 668.4 Plastiques, vinyles Résumé : The transformation from the combustion to the electric engine entails several imponderabilities for the plastics industry. In part, electric drives have completely different material requirements which are becoming specifically evident with the increasing use of appropriate vehicles. The following article presents an overview of the most important changes. Note de contenu : - Flame protection is required - ID.2 reaches USD 100 per kWh - Without halogens, phosphar and halides - Reasons for electric breakdown - Figure : In electric vehicles, the change in engine technology also entails new requirements for the plastic materials used - Fig. 1 : Key components of the high voltage drive train system of a Chevrolet Bolt - Fig. 2 : PA is a very suitable material also for EV applications. For instance, PA6 and PA66 are used in HV connectors, HV PA 4T busbars and contactors - Fig. 3 : Terminal corrosion caused by outgassed heat stabilizers of migration of other ionic impurities in the plastic - Fig. 4 : In order to increase the the voltage rather than the current - Fig. 5 : The creep distance is often deliberately increased to prevent the flow of current between two contacts - Fig. 6 : Comparison of different polymer classes by tracking resistance. Colors indicate respective mechanical strength - Fig. 7 : Electric breakdown strength before aging at-elevated temperatures. Most polymers show a decline in breakdown strentgh at rising temperatures - Fig. 8 : Electric breakdown strength after aging at elevated temperatures. The curves of the materials are similar before and after aging. As a result of aging, the dielectric strength decreases as expected - Fig. 9 : DSM high-voltage material portfolio for high operating temperatures. Different materials are recommended depending on the temperature range - Fig. 10 : Functional diagram of the powertrain in a battery electric vehicle. Electrification adds further components - Table 1 DSM portfolio of compounds without critical halide salts or red phosphorous, which could lead to electro corrosion En ligne : https://drive.google.com/file/d/1odl1Mid1-bXu7zTe7Qf58lM9EpQhdHJF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33974 [article]

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Getting fuel cell vehicles fit for use / Tamim Sidiki in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2021)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 2 (2021) . - p. 10-13 Titre : Getting fuel cell vehicles fit for use : Material improvements make fuel cells more reliable Type de document : texte imprimé Auteurs : Tamim Sidiki, Auteur ; Yu Bin, Auteur ; Robert Janssen, Auteur Année de publication : 2021 Article en page(s) : p. 10-13 Langues : Anglais (eng) Catégories : Humidité -- Absorption Lixiviation Matières plastiques -- Propriétés mécaniques Piles à combustible Polysulfures de phénylène Thermoplastiques Une matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire. Index. décimale : 668.4 Plastiques, vinyles Résumé : In addition to the purely battery-powered electric drive, the fuel cell is regarded as an alternative to the internal combustion engine. In order to bring them into series production, however, improvements in the reliability of the cells are still necessary. Especially in ion leaching and hydrolysis resistance with corresponding long-term mechanical properties of the materials used so far, there is still some catching up to do. One possibility are specially developed PPS compounds. Note de contenu : - Fuel cells are ideal for transport - Thermoplastics essential for high performance and reliability - High hydrolysis resistance necessary - Avoid ion leaching - PPS instead of PA for fuel cells - 10000 hours of measurement data - Fig. 1 : PPS shows the lowest moisture absorption (left) and ion leaching (right) compared to PA6, PA66 and PPA - Fig. 2 : Xytron G4080HR has the lowest ion leaching (left) and solution conductivity (right) compared to other 40 % glass fiber-reinforced PPS connections. A solution conductivity of 10 µS/cm as an indication of low ion leaching is considered the ideal level to ensure a long cell life - Fig. 3 : Comparison of the tensile modulus (left) and the tensile strength (right) of different polymer compounds : the aging resistance of the two PPS compounds is higher than that of the PA and the two PPA - Fig. 4 : Comparison of the DMTA storage modulus (elastic modulus) between PPA with high Tg and PPS at different stages (dry as molded, after moisture absorption until saturation and after hydrolytic aging ; W/G = water/glycol) Source : DSM ; graphic : © Hanser - Fig. 5 : Compared to other materials, Xytron G4080HR retains its mechanical properties much longer during long-term hydrolytic aging. The ion leaching is also low En ligne : https://drive.google.com/file/d/1COwVIoqiJ4slmgUMTmxKhhNj0oJqN5la/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35489 [article]

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Managing the smallest melt volumes / Patrick Duis in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 1 (01-02/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 1 (01-02/2016) . - p. 20-23 Titre : Managing the smallest melt volumes : Influencing melt flow when molding thin-walled electronic components in high-performance polyamide resins Type de document : texte imprimé Auteurs : Patrick Duis, Auteur ; Yu Bin, Auteur ; Gerard Haagh, Auteur Année de publication : 2016 Article en page(s) : p. 20-23 Langues : Anglais (eng) Catégories : Clé USB Equipement électronique miniaturisé Etat fondu (matériaux) Polyamide 46 Index. décimale : 668.4 Plastiques, vinyles Résumé : Miniaturization - Polyamide - Thermoplastic materials must prove their fit in ever smaller and powerful electronic components. A more detailed investigation was carried out focusing on the melt compression experienced when USB-C connectors are injection molded in polyamide resins, as it has shown to have a significant effect on melt flow and is an important factor in thin-wall component molding. Note de contenu : - Effects of melt compression - Reducing the melt cushion En ligne : https://drive.google.com/file/d/1A5NoSxZ3kixdmfhSc9x4y4S4iIFwl2vo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25585 [article]

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No trouble with H2 / Yu Bin in KUNSTSTOFFE INTERNATIONAL, Vol. 113, N° 2 (2023)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 113, N° 2 (2023) . - p. 24-29 Titre : No trouble with H2 : PPS for hydrogen mobility Type de document : texte imprimé Auteurs : Yu Bin, Auteur ; Bert Keestra, Auteur ; Tamim Sidiki, Auteur Année de publication : 2023 Article en page(s) : p. 24-29 Langues : Anglais (eng) Catégories : Automobiles -- Moteurs -- Pièces Hydrogène -- Stockage Matières plastiques dans les automobiles Piles à combustible Polysulfures de phénylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Fuel cells lend themselves to many areas in the transportation sector. Heavy-duty transportation in particular profits from the technology. However, the complex drive systems require special materials. Polyphenylene sulfide-based compounds developed specifically for this purpose not only offer the necessary mechanical and chemical resistance, but also greatly extend the systems’ service life. Note de contenu : - Cheap green hydrogen - Hydrogen in cars or trucks ? - Hydrogen combustion in ars - Fuel cell versus electromobility - Well-considered selection of material - Risks of improper material selection - Prediction of material behavior - The difficulties of hydrogen storage - PA6, PA11 or PE ? - Fig. 1 : Global hydrogen production by industry : The transport sector has played only a very minor role in this so far - Fig. 2 : Expected future distribution of drive types among the various transport sectors : electric vehicles will play a major role primarily in passenger cars, fuel cells more in transport vehicles - Fig. 3 : Structure of a complete fuel cell powertrain - Fig. 4 : Explosive view of stack individual cell : The choice of materials for the various components plays a very important role - Fig. 5 : Potential failure modes for a fuel cell because of an improper plastic selection. Especially the leaching of ions and the leaching of organic carbon molecules is a major problem - Fig. 6 : For its fuel cell system SHPT Prome P4H, the Chinese manufacturer SHPT uses a PPS from DSM - Fig. 7 : Hydrogen permeation performance of different materials. PA6 achieves the best values in comparison - Table : Comparison of polymer compounds in fuell cell working conditions En ligne : https://drive.google.com/file/d/1RvB4L1BMp2jTOnNFJfQmXyv9XmdeJwbg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39331 [article]

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