Decomposable crosslinking paint / Y. Nakayama in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 887 (12/1998)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 887 (12/1998) . - p. 63-68 Titre : Decomposable crosslinking paint Type de document : texte imprimé Auteurs : Y. Nakayama, Auteur Année de publication : 1998 Article en page(s) : p. 63-68 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Décomposition (chimie) Polymères -- Détérioration Réticulation (polymérisation) Revêtements Revêtements -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : This study describes a novel paint technology that meets the recycling needs of industrial products. The decomposable crosslinking paint exhibits good properties throughout its use in the natural environment, and after use, it can be easily eliminated in a special process to recover the substrates. The paint was cured by a reaction between a carbonyl group of resins and a hydrazide group of crosslinking agents. The reverse reaction could be promoted by three essential components: water (reactive material), an acid (catalyst), and a solvent (diluent between active groups). The paint film was eliminated by dipping the paint in the solution containing these three components. The rates of dissolution were determined by water content, acid strength, swelling intensity of solvent, and dipping temperature. Note de contenu : - EXPERIMENTAL : Preparation - Measurements - RESULTS AND DISCUSSION : Properties of coating films - Elimination of coating films Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18056 [article]

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Decomposable crosslinking paint : Waste minimization / Y. Nakayama in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 900 (01/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 900 (01/2000) . - p. 57-62 Titre : Decomposable crosslinking paint : Waste minimization Type de document : texte imprimé Auteurs : Y. Nakayama, Auteur Année de publication : 2000 Article en page(s) : p. 57-62 Note générale : Bibliogr. Langues : Américain (ame) Tags : Peinture  Feuil  Enlèvement  Polymère  réticulé  Décomposition  chimique  Au  trempé  Solution  Récupération  déchet Index. décimale : 667.6 Peintures Résumé : A paint film crosslinked by a reaction between a carbonyl group and a hydrazide group could be easily decomposed by dipping it in a solution containing water, solvents, and acids. The method was studied to minimize the waste produced by the elimination of the decomposable paint film. This was performed in two steps: a dipping in aqueous solution containing solvents and acids, and a successive wash with solvents. Decomposition of the crosslinking bonds and the elution of the decomposed free crosslinker took place in the first dipping process, and the elimination of the decomposed resins in the second washing process. The aqueous solution could be used for a long time without contamination by the decomposed resins, and the decomposed resin could easily be recovered from the resin solution containing no other contaminants. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5853 [article]

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Experimental assessment of dispersion failure of glass fiber reinforced plastics in a twin screw extruder / K. Hirata in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 4 (08/2013)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 4 (08/2013) . - p. 368-375 Titre : Experimental assessment of dispersion failure of glass fiber reinforced plastics in a twin screw extruder Type de document : texte imprimé Auteurs : K. Hirata, Auteur ; H. Ishida, Auteur ; M. Hiragohri, Auteur ; Y. Nakayama, Auteur ; T. Kajiwara, Auteur Année de publication : 2013 Article en page(s) : p. 368-375 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Composites à fibres de verre -- Extrusion Distribution et orientation des fibres Evaluation Extrudeuse bi-vis Extrusion -- Défauts Index. décimale : 668.4 Plastiques, vinyles Résumé : To investigate the conditions necessary for glass fiber bundle dispersion in the polymer compounding process, we developed a method for experimentally quantifying dispersion failure in this study. We employed a co-rotating twin-screw extruder in our experiment and investigated the dependence of frequency of occurrence of dispersion failure on screw configurations (a forward kneading disk (FKD) and a backward mixing screw (BMS) with different screw configurations), throughput (Q), and screw speed (Ns). From our experiments, we found that increasing the production rate promotes the occurrence of dispersion failure when a FKD is used. Dispersion failure is markedly suppressed when a BMS is used. We thus found that the production rate could be increased by using a BMS with a large length-to-diameter (L/D) ratio. Note de contenu : - EXPERIMENTAL : Materials - Compounding - Screw design - Dispersion failure measurement - Fiber length measurement - RESULTS AND DISCUSSION : Dispersion failure of glass fiber bundles - Glass fiber fracture DOI : 10.3139/217.2704 En ligne : https://drive.google.com/file/d/1Bx-EyImh5QLWNGrQwa9AMqc1adiWxHN4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19281 [article]

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