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Chlorinated butyl acrylate - methyl methacrylate copolymer : A novel film former / S. Bhandari in PAINTINDIA, Vol. XLV, N° 6 (06/1995)
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Titre : Chlorinated butyl acrylate - methyl methacrylate copolymer : A novel film former Type de document : texte imprimé Auteurs : S. Bhandari, Auteur ; S. Chandra, Auteur Année de publication : 1995 Article en page(s) : p. 27-32 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Copolymère acrylate de butyle' 'Polymétacrylate méthyle' Chloration chlore' 'Stabilité thermique' 'Propriété mécanique' Feuil chimique' 'Résistance feu' 'Etude expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : Maximum 25.6 per cent chlorine content could be achieved during the chlorination of butyl acrylate - methyl methacrylate copolymer. Infrared analysis revealed that chlorine enters only in the main chain by the substitution reaction. The thermal stability was found increasing with the chlorine content. Chlorinated copolymer possessed superior film properties as compared those of the unchlorinated except in terms of flexibility and adhesion. The property of resistance to fire was also introduced in the copolymer on chlorination. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of Poly (butyl acrylate) - Chlorination of Poly (butyl acrylate) - Synthesis and chlorination of butyl acrylate - methyl methacrylate copolymer - Infrared analysis - Determination of thermal stability - Mechanical and chemical film properties - Test for fire resistance
- RESULTS AND DISCUSSION : Viscosity and solubility - Substitution of chlorine - Thermal stability - Flexibility and adhesion - Impact resistance - Scratch hardness - Water, acid and alkali resistance - Fire resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13643
in PAINTINDIA > Vol. XLV, N° 6 (06/1995) . - p. 27-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006452 - Périodique Bibliothèque principale Documentaires Disponible Chlorinated maleinized guayule rubber as an adhesion promoter for polypropylene / Michael. D. Foster in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 889 (02/1999)
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Titre : Chlorinated maleinized guayule rubber as an adhesion promoter for polypropylene Type de document : texte imprimé Auteurs : Michael. D. Foster, Auteur ; Shelby F. Thames, Auteur Année de publication : 1999 Article en page(s) : p. 91-99 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau revêtement' 'Peinture eau' Adhérence 'Matière plastique' 'Propène polymère' 'Traitement surface' 'Caoutchouc naturel' modifié' Chloration Furane-2,5-dione(2,5-dihydro) 'Promoteur adhérence' Index. décimale : 667.9 Revêtements et enduits Résumé : Chlorinated maleinized guayule rubbers (CMGR) were synthesized and applied as coatings onto polypropylene panels. CMGR orientation was critical to adhesion and was verified by contact angle measurements. Reducing the quantity of tetrahydrofuran (THF) decreased adhesion from 57 N/cm2 with pure THF to 23 N/cm2 with four percent THF in water. Percent maleinization above a critical concentration of 15 by weight decreased adhesion. However, 10% maleinization was required for dispersion stability in water while 5-10% concentration provided maximum adhesion. A five percent maleic CMGR dispersion at 240 g/L THF concentration was stable for less than 24 hr while a 10% maleic anhydride concentration has shown long-term stability. Note de contenu : - EXPERIMENTAL : Materials and equipment - FTIR analysis of CMGR - Titration of CMGR - Coating formulation - VOC effect on adhesion - Surface application - Coating surface analysis - Experimental design - Adhesion testing - Contact angle and calculation of the surface energy Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17842
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 889 (02/1999) . - p. 91-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003558 - Périodique Bibliothèque principale Documentaires Disponible 009603 - Périodique Bibliothèque principale Documentaires Exclu du prêt Chlorinated-maleinized guayule rubber : a novel matting agent for powder coatings / William A. Purvis in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 857 (06/1996)
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Titre : Chlorinated-maleinized guayule rubber : a novel matting agent for powder coatings Type de document : texte imprimé Auteurs : William A. Purvis, Auteur ; Shelby F. Thames, Auteur Année de publication : 1996 Article en page(s) : p. 67-73 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant
Caoutchouc chloré
Réticulants
Revêtement poudre -- Additifs:Peinture poudre -- AdditifsTags : 'Peinture poudre' Adjuvant Caoutchouc Greffage Furane-2,5-dione(2,5-dihydro) Chloration Réticulant 'Agent matité' Index. décimale : 667.9 Revêtements et enduits Résumé : Grafting of maleic anhydride onto low molecular weight guayule rubber, followed by chlorination of the residual double bonds provides a powder reactive to alcohols, amines, and epoxides. The product, chlorinated-maleinized guayule rubber (CMGR), is a potential crosslinker/additive for powder coating formulations. Accordingly, polyester-hydroxyalkyl-amide and epoxy-polyester hybrid powder coating formulations were developed, applied, tested, and contrasted to properties of commercial powder coating formulations. The coatings featured reduced gloss, surface texturing, and physical property characteristics equal to or exceeding those derived from commercial powder coating formulations. Thus, CMGR is a promising reactive crosslinker for powder coatings. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of anhydride functional chlorinated rubber (CMGR) - Characterization of CMGR - Formulation and processing of CMGR modified powder coatings - Characterization of powder coatings
- RESULTS AND DISCUSSION : Physical properties of CMGR - CMGR powder coatings - CMGR modified PHAA powder coatings - CMGR modified EPE hybrids - Thermal stability and corrosion resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18337
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 857 (06/1996) . - p. 67-73[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003516 - Périodique Bibliothèque principale Documentaires Disponible 003527 - Périodique Bibliothèque principale Documentaires Exclu du prêt Novel chlorinated film formers for high performance coatings / S. Bhandari in PAINTINDIA, Vol. XLV, N° 7 (07/1995)
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Titre : Novel chlorinated film formers for high performance coatings Type de document : texte imprimé Auteurs : S. Bhandari, Auteur ; S. Chandra, Auteur Année de publication : 1995 Article en page(s) : p. 19-35 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Polymère chlore' 'Résine alkyde' Préparation Chloration 'Huile soja' 'Corps gras végétal' époxyde' 'Polyacrylate de butyle' 'Copolymère acrylate méthacrylate méthyle' 'Propriété thermique' mécanique' chimique' Feuil 'Article synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : Chlorinated alkyds, epoxy esters and butyl acrylate-méthyl methacrylate (BA-MMA) copolymers were synthesised by bubbling dry chlorine gas in carbon tetrachloride solution. The chlorination of DCO alkyd was studied both in the absense as well as in the presence of iodine catalyst. Soybean and nigerseed oil alkyds and linsseed oil epoxy ester were, however, chlorinated without catalyst only. The chlorination of BA-MMA copolymer was performed in the presence of UV light.
It was found that the maximum chlorine content of about 50-55 per cent could be achieved in DCO, soybean and nigerseed oil alkyds and linseed oil epoxy ester. Five samples each of chlorinated DCO, soybean and nigerseed oil alkyds and four samples of chlorinated epoxy ester, varying in the chlorine content, were synthesized in order to study the effect of chlorine. In the case of BA-MMA copolymer maximum chlorine content about 26 per cent was obtained. One more sample of chlorinated BA-MMA copolymer, with lesser chlorine content, was synthesized for comparison purposes.
It was confirmed through IR spectroscopy that chlorine enters only into the aliphatic portions of all the three alkyds and epoxy ester molecules by addition and substitution reactions and only into the aliphatic main chain of the BA-MMA copolymer molecule by substitution reaction.
Thermal stability of all the chlorinated products was determinated by the Bloomfield test and by the weight loss procedure and compared with that of the commercial sample of chlorinated rubber. It was found that the termal stability increases with the chlorine content. In the case of chlorinated BA-MMA copolymers, the thermogravimetric analysis (T.G.A) was also carried out which further confirmed that the thermal stability increases with the chlorine content.
All the products were characterized for sulubility, compatibility, colour viscosity, iodine value, epoxide equivalent and molecular weight. The mechanical and chemical film properties were also appraised simultaneously which revealed that, in general, the cholorinated products possessed superior film properties as compared to those of the unchlorinated ones expect in terms of flexibility and adhesion and solvent resistance.
All the chlorinated products also passed the standard tests for protection against corrosion and resistance to salt-spray and fire, justifying their application in high performance coatings.Note de contenu : - Important materials
- Chlorinated DCO alkyds : Preparation of alkyd - Chlorination - Samples prepared
- Chlorinated soybean oil alkyds : Preparation of alkyd - Chlorination - Samples prepared
- Chlorinated nigerseed oil alkyds : Preparation of alkyd - Chlorination - Samples prepared
- Chlorinated epoxy esters : Preparation of epoxy ester - Chlorination - Samples prepared
- Chlorinated acrylics : Preparation of poly (butyl acrylate) - Chlorination - Preparation of chlorinated butyl acrylate-methyl methacrylate (BA-MMA) copolymer - Sample prepared
- Characterization : Solubility and compatibility - Colour - Viscosity - Addition/substitution of chlorine - Thermal stability
- Evaluation : Drying time - Flexibility and adhesion - Impact resistance - Scratch hardness - Water, acid and alkali resistance - Solvent resistance - Protection against corrosion - Resistance to salt-spray - Fire resistancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13620
in PAINTINDIA > Vol. XLV, N° 7 (07/1995) . - p. 19-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006454 - Périodique Bibliothèque principale Documentaires Disponible Synthesis, spectral and dyeing properties of phenylazopyrazolone-containing acylamide disperse dyes designed for poly(lactic acid) / Zhihua Cui in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)
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Titre : Synthesis, spectral and dyeing properties of phenylazopyrazolone-containing acylamide disperse dyes designed for poly(lactic acid) Type de document : texte imprimé Auteurs : Zhihua Cui, Auteur ; Xidong Wang, Auteur ; Weiguo Chen, Auteur ; Enling Hu, Auteur ; Kai Liu, Auteur Année de publication : 2012 Article en page(s) : p. 283-289 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Colorants -- Synthèse
Colorants phénylazopyrazolone
Polylactique, AcideL'acide polylactique (anglais : polylactic acid, abrégé en PLA) est un polymère entièrement biodégradable utilisé dans l'alimentation pour l'emballage des œufs et plus récemment pour remplacer les sacs et cabas en plastiques jusqu'ici distribués dans les commerces. Il est utilisé également en chirurgie où les sutures sont réalisées avec des polymères biodégradables qui sont décomposés par réaction avec l’eau ou sous l’action d’enzymes. Il est également utilisé pour les nouveaux essais de stent biodégradable.
Le PLA peut-être obtenu à partir d'amidon de maïs, ce qui en fait la première alternative naturelle au polyéthylène (le terme de bioplastique est utilisé). En effet, l'acide polylactique est un produit résultant de la fermentation des sucres ou de l'amidon sous l'effet de bactéries synthétisant l'acide lactique. Dans un second temps, l'acide lactique est polymérisé par un nouveau procédé de fermentation, pour devenir de l'acide polylactique.
Ce procédé conduit à des polymères avec des masses molaires relativement basses. Afin de produire un acide polylactique avec des masses molaires plus élevées, l'acide polylactique produit par condensation de l'acide lactique est dépolymérisé, produisant du lactide, qui est à son tour polymérisé par ouverture de cycle.
Le PLA est donc l’un de ces polymères, dans lequel les longues molécules filiformes sont construites par la réaction d’un groupement acide et d’une molécule d’acide lactique sur le groupement hydroxyle d’une autre pour donner une jonction ester. Dans le corps, la réaction se fait en sens inverse et l’acide lactique ainsi libéré est incorporé dans le processus métabolique normal. On obtient un polymère plus résistant en utilisant l'acide glycolique, soit seul, soit combiné à l’acide lactique.
Solvatochromisme
Teinture -- Fibres textiles synthétiquesTags : 'Acide polylactique' 'Fibres synthétiques' Teinture 'Colorants phenylazopyrazolone' acrylamides' Chloration Amidation Amines 'Spectroscopie transformée Fourier' 'Propriétés solvatochromiques' Diméthylformamide Sorption Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of phenylazopyrazolone disperse dyes containing an acylamide moiety were synthesised from carboxyl-containing acid dyes via chlorination and amidation with different sorts of amines. The structures of these new dyes were confirmed by Fourier Transform–infrared, proton nuclear magnetic resonance, mass spectroscopy and elemental analysis. Their solvatochromic properties in different solvents were also investigated and the absorbance spectra of the acylamide dyes in solution exhibited a red shift when dissolved in dimethylformamide, compared with acetone. Their dyeing behaviour, including dye sorption, colour build-up and colour fastness properties on poly(lactic acid) fibres, was also determined, whereupon it was found that the tertiary acylamide dyes simultaneously exhibited high dye sorption and satisfactory colour build-up and fastness properties on the poly(lactic acid) fabric. Note de contenu : - EXPERIMENTAL : Materials, equipment and analysis - Synthesis of acid dye 1 - Synthesis of acyl chloride 2 - Synthesis of disperse 3a-i - Dyeng - Dye sorption - Shade depth - Fastness test - Partition coefficient and standard affiniti
- RESULTS AND DISCUSSION : Synthesis and characterisation - Spectral properties - Dye sorption and standard affinity - Colour build-up and colour fastnessDOI : 10.1111/j.1478-4408.2012.00376.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00376.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15676
in COLORATION TECHNOLOGY > Vol. 128, N° 4 (2012) . - p. 283-289[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14081 - Périodique Bibliothèque principale Documentaires Disponible