Abrasion resistance of polymer and polymer–ceramic composite coatings for steel hydraulic structures / P. V. Vijay in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 401-411 Titre : Abrasion resistance of polymer and polymer–ceramic composite coatings for steel hydraulic structures Type de document : texte imprimé Auteurs : P. V. Vijay, Auteur ; Piyush R. Soti, Auteur ; Derrick A. Banerjee, Auteur ; Konstantinos A. Sierros, Auteur Année de publication : 2020 Article en page(s) : p. 401-411 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Essais de résilience Matériaux céramiques Mouillabilité Mouillage (chimie des surfaces) Polyéthylène haute densité Profilométrie Résistance à l'abrasion Résistance à l'usure Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : There is an increased demand for abrasive wear-resistant coatings that add durability to steel hydraulic structures, particularly for those subjected to flowing water with debris and alternate wet/dry cycles. These coating systems provide not only corrosion and chemical resistance, but also good erosion and abrasion resistance to the metallic surfaces, which are constantly exposed to flowing water containing sand particles and debris. Generally, vinyl-based coatings are used on hydraulic steel structures to protect them from corrosion and abrasion. However, due to the existence of high water force and debris, the coating is abraded at a faster rate leading to significant maintenance and repair costs. In this study, abrasive wear resistance of conventional vinyl-based coating systems currently used on lock and dam steel structures by U.S. Army Corps of Engineers has been compared with polymer matrix composite coatings, fibrous polymer coatings, and ultrahigh molecular weight polyethylene (UHMWPE). Six coating systems were evaluated through two-body abrasion tests using a reciprocating abrader under dry and wet conditions. Furthermore, wettability of the coating systems and its effect on the wear rate under the presence of water was studied. In addition, scanning electron microscopy of the wear tracks on different coatings was conducted to study and identify their failure mechanisms. Based on the results, UHMWPE and polymer–ceramic composite coatings were found to perform significantly better than the conventional vinyl-based coatings. Note de contenu : - EXPERIMENTAL DETAILS : Coating systems - Surface preparation for application of coatings - Wear tests - Surface wettability - RESULTS AND DISCUSSION : Depth and volume of coating abrasion - Rate of abrasive wear - Effect of surface wettability - Wear mechanisms and failure of coatings - Field implementation and inspection of coatings DOI : https://doi.org/10.1007/s11998-019-00286-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00286-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33991 [article]

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Accelerated weathering performance of wood-plastic composites reinforced with carbon and glass fibre-woven fabrics / Sefa Durmaz in COLORATION TECHNOLOGY, Vol. 138, N° 1 (02/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 1 (02/2022) . - p. 71-81 Titre : Accelerated weathering performance of wood-plastic composites reinforced with carbon and glass fibre-woven fabrics Type de document : texte imprimé Auteurs : Sefa Durmaz, Auteur ; Yusuf Ziya Erdil, Auteur ; Özlem Özgenç, Auteur Année de publication : 2022 Article en page(s) : p. 71-81 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Composites à fibres Composites à fibres végétales Essais accélérés (technologie) Essais dynamiques Fibres de carbone Fibres de verre Flexion (mécanique) Polyéthylène greffé anhydride maléique Polyéthylène haute densité Réaction de couplage Résistance aux conditions climatiques Index. décimale : 668.4 Plastiques, vinyles Résumé : Wood-plastic composites (WPCs) are new generation materials widely used in outdoor conditions; however, the appearance and mechanical properties of WPCs change with exposure to weather. In this study, high-density polyethylene-based flat-pressed WPCs are reinforced with carbon and glass fibre-woven fabrics for uses where high mechanical properties are needed in outdoor conditions. For this purpose, WPCs are exposed to accelerated weathering conditions to determine the effect of weathering with and without reinforcement. The results show that, after weathering, colour changes are inevitable for WPCs. Attenuated total reflection–Fourier transform-infrared analysis reveals the changes in the matrix's chemical structure, illustrating the alterations in WPC surface characteristics. The mechanical properties of WPCs decrease as a result of photodegradation. However, the reinforced WPCs have higher mechanical properties than the control samples, despite extensive degradation. Carbon fibre (200 g/m2) achieved the greatest flexural strength and modulus of elasticity, 150% and 122% higher, respectively, than unreinforced WPCs. Scanning electron microscopy analysis shows that, despite the intensive photodegradation on the surface, the integration of the matrix and woven fabrics was still strong. The surface erosion was observed with light microscopy. The visual appearance also exhibited some changes that occurred on the surface of WPCs. Note de contenu : - MATERIALS AND METHODS : Materials - Composite processing - Accelerated UV weathering test - Colour measurement - ATR–FTIR spectroscopy analysis - Flexural testing and modulus of elasticity - Microscopic analysis - RESULTS AND DISCUSSION : Colour change - ATR–FTIR spectroscopy analysis - Flexural properties and MOE - Visual appearance - Microscopic images - Table 1 : Changes in the wood index after weathering - Table 2 : Changes in the flexural properties of wood-plastic composites after weathering DOI : https://doi.org/10.1111/cote.12572 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12572 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37500 [article]

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Alliages des polymères : rhéologie et morphologie / Jean L. Leblanc in CAOUTCHOUCS & PLASTIQUES, N° 745 (11/1995)

[article]  inCAOUTCHOUCS & PLASTIQUES > N° 745 (11/1995) . - p. 41-47 Titre : Alliages des polymères : rhéologie et morphologie Type de document : texte imprimé Auteurs : Jean L. Leblanc, Auteur Année de publication : 1995 Article en page(s) : p. 41-47 Note générale : Bibliogr. Langues : Français (fre) Catégories : Alliages polymères Fluides newtoniens Morphologie (matériaux) Polyéthylène haute densité Polypropylène Polystyrène Rhéologie Viscosité Index. décimale : 668.4 Plastiques, vinyles Résumé : Face au développement exponentiel des applications des alliages de polymères, il est urgent de comprendre les mécanismes rhéologiques et morphologiques de cette famille de matériaux. Note de contenu : - Considérations préliminaires - Fonction de viscosité et loi de mélange - Développement des morphologies - Le dilemme morphologie/rhéologie - FIGURES : 1. Viscosité en fonction de la composition - Mélange PEhd/PS - 2. Viscosité en fonction de la composition. Mélanges de polypropylène (données de Schreiber et Olgiun - 1986) - 3. Déformation d'une goutte newtonienne dans un champ de cisaillement uniforme - 4. Mélange de fluides newtoniens - Rupture de gouttes viscoélastiques Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25431 [article]

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An annular rotating-die technique in extrusion process : effect of Mandrel rotating speed on extrudate swell behavior of HDPE parison / N.-T. Intawong in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 5 (11/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 5 (11/2014) . - p. 607-615 Titre : An annular rotating-die technique in extrusion process : effect of Mandrel rotating speed on extrudate swell behavior of HDPE parison Type de document : texte imprimé Auteurs : N.-T. Intawong, Auteur ; A. Darajang, Auteur ; S. Udomsom, Auteur ; T. Yoochoosai, Auteur ; C. Kantala, Auteur Année de publication : 2014 Article en page(s) : p. 607-615 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Extrudeuse monovis Extrudeuse rotative Matières plastiques -- Moulage par extrusion-soufflage Polyéthylène haute densité Index. décimale : 668.9 Polymères Résumé : This work aims to propose an annular rotating-die technique which is specifically designed and constructed in order for the mandrel to rotate in the stationary barrel during extrusion. The annular rotating-die was employed to study the effect of the mandrel rotating speeds on the extrudate swell behavior of HDPE parison in single screw extruder at a test temperature of 210°C. The results of experiment found that rotation of mandrel caused significant change in dimension of HDPE parison after it flowed out from the annular rotating-die. It was also found that at the same apparent shear rate, the diameter swell decreased with increasing mandrel rotating speed whereas the thickness swell yielded opposite results. These results could be explained by the change of flow direction during the flow of HDPE melt in the annular rotating-die. Furthermore, the annular rotating-die technique proposed in this research could be applied in adjusting size of diameter and thickness and in predicting thickness of HDPE parison during extrusion with no need to change any production parameter in the polymer extruder. Note de contenu : - EXPERIMENTAL : 1. Raw material - 2. Experimental apparatus and procedures - 3. Apparent shear rate calculation - 4. Measurements of the extrudate swell - RESULTS AND DISCUSSION : 1. Development of HDPE parison Dimension after exiting from the annular rotating-die - 2. swelling properties of HDPE parison in an annular rotating-die - 3. Application of annular rotating-die technique in extrusion process DOI : 10.3139/217.2930 En ligne : https://drive.google.com/file/d/1tLPjdpXncHHo2aDcykDzGVhJPQM2w01n/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22227 [article]

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An experimental study on the properties of recycled high-density polyethylene / A. G. Toroslu in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 5 (2021)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 5 (2021) . - p. 557-563 Titre : An experimental study on the properties of recycled high-density polyethylene Type de document : texte imprimé Auteurs : A. G. Toroslu, Auteur Année de publication : 2021 Article en page(s) : p. 557-563 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine Conduction électrique Essais dynamiques Matières plastiques -- Propriétés mécaniques Matières plastiques -- Recyclage Microscopie électronique à balayage Polyéthylène haute densité Thermocinétique Viscosité Index. décimale : 668.4 Plastiques, vinyles Résumé : Recycling of plastic materials has become more environmentally important than recycling of other materials. The most important problem during recycling is the presence of oil, dirt, dust and metal particles that are mixed with plastic materials. These mixtures can change their its mechanical and physical properties and it is quite costly to remove them completely. Removing iron alloy particles from plastic is possible by using the magnetic method. However, removing non-metallic materials requires extra processing. In this study, the use of recycled High-Density Polyethylene (rHDPE) without an expensive cleaning processes has been investigated. Different amounts of aluminium oxide (Al2O3) were added to High Density Polyethylene (HDPE) to simulate the effect of non-metallic material involved. The effect of these contamination rates on the mechanical and physical properties of HDPE was examined in detail. For this purpose, recyclable materials were produced by mixing rHDPE with 1%, to 7% Al2O3. The results show that up to 7% of the mixture has acceptable effects on the properties of HDPE. When the results of the experiments are examined, it is observed that there is a 3.74% change in the elastic modulus of the material. This means, that up to 7% non-metal contaminated rHDPE material can be used without any costly recycling process. Note de contenu : - Preparation of samples - Injection parameters - Scanning electron microscopy (sem) - Tensile testing - Melt flow index (mfi) - Material hardness - Electrical conductivity - Thermal conductivity DOI : https://doi.org/10.1515/ipp-2020-4071 En ligne : https://drive.google.com/file/d/13X_MTOZianLe1z702Im_j6QqOCvhv5xX/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36522 [article]

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Application du modèle non linéaire de Marko Ledvij à l'étude du comportement électrique des polymères conducteurs composites / M. Hamouni in MATERIAUX & TECHNIQUES, Vol. 97, N° 3 (2009)  

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Commitment to excellence / Harold Smith in ADHESIVES AGE, Vol. 42, N° 12 (12/1999)  

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Compact artificial turf system / Susanne Beyer in CHEMICAL FIBERS INTERNATIONAL, Vol. 62, N° 1 (03/2012)  

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Compact artificial turf system / Susanne Beyer in CHEMICAL FIBERS INTERNATIONAL, (10/2012)  

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Comportement mécanique et propriétés thermique des composites polyéthyènes renforcés par des fibres lignocellolusiques / Chadia Ihamouchen in MATERIAUX & TECHNIQUES, Vol. 106, N° 6 (2018)  

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Compressed natural gas (CNG) tank technology / Scott W. Beckwith in SAMPE JOURNAL, Vol. 49, N° 4 (07-08/2013)

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Correlating substrate surface analysis to adhesive performance / Michaeleen Pacholski in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 11 (11/2015)  

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Creeping sphere-plane squeeze flow to determine the zero-shear-rate viscosity of HDPE melts / Edwin C. Cua in APPLIED RHEOLOGY, Vol. 14, N° 1 (2004)

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Cyclic extrusion of recycled high density polyethylene/banana fiber/fly ash cenosphere biocomposites : thermal and mechanical retention properties / Sukanya Satapathy in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)  

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Défauts d'aspect des pièces injectées / Marie-France Lacrampe in CAOUTCHOUCS & PLASTIQUES, N° 797 (09/2001)

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Development of leather cutting board from plastic waste / Fitsum Etefa Ahmed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 12 (12/2021)  

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Développement et caractérisation des rachis de plumes de poulet, de la sciure et du matériau composite hybride HDPE / Gayatri Uppalapati in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 28, N° 4 (10-11-12/2018)

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Economical blow molding / Rainer Sattel in KUNSTSTOFFE INTERNATIONAL, Vol. 98, N° 9/2008 (09/2008)

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Effect of blending protocol on the rheological properties and morphology of HDPE and LLDPE blend-based nanocomposites / Fabio R. Passador in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 3 (07/2012)  

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Effect of coupling agent and ground tire rubber content on the properties of natural fiber polymer composites / N. Nikpour in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 4 (08/2016)  

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