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Polyesters for sustainable adhesives technologies / Timothy E. Long in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 9 (09/2011)
[article]
Titre : Polyesters for sustainable adhesives technologies Type de document : texte imprimé Auteurs : Timothy E. Long, Auteur ; Musan Zhang, Auteur ; Gozde I. Ozturk, Auteur Année de publication : 2011 Article en page(s) : p. 30-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs sensibles à la pression
PolyestersTags : Copolyesters Transestérification PSA 'Monomère cyclique, 2,2,4,4-tétraméthyle-1,3-cyclobutanédiol'(CBDO) Polyols Diesters Diols Polymérisation 'Copolymères séquencés' Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Melt polycondensation synthesis of polyesters presents a solvent- free and environmentally friendly approach of producing pressure-sensitive adhesives (PSAs) due to their inherent biodegradability and low-cost manufacturing process. Low glass-transition temperature (-40°C) all-aliphatic polyester PSAs were synthesized using melt polymerization. Careful selection of diester, diol, and monomer stoichiometry enabled tailoring of the glass-transition temperature (Tg) and adhesive properties as investigated using adhesive testing methods.
Melt rheological experiments indicated a correlation between polyester molecular weight and adhesive performance. These studies enabled us to design a new family of segmented copolyesters for their potential in adhesive applications due to controlled sequence distribution and morphological consequences of microphase-separated block copolymers. Incorporating electrostatic interactions into copolymers also affords an avenue for the modification of thermally labile adhesive properties on the molecular level.
We have recently developed a synthetic strategy that allows for melt transesterification of segmented block copolyesters using the sterically hindered and cyclic monomer, 2,2,4,4-tetramethyl-1,3-cyclobutanediol (CBDO). This monomer has also received significant industrial attention as a replacement for bisphenol-A based polycarbonates. High-Tg polyester polyols containing CBDO and 0-5 mol% sulfonation were synthesized using conventional melt transesterification. Further reaction of the hard segment polyols with diesters and diols that comprise the resulting soft block demonstrates a one-pot synthetic method toward a new class of thermoplastic elastomers.
Herein, we describe the influence of ionic interactions on sulfonated segmented copolyesters. Specifically, transesterification resistance studies and melt rheological experiments indicated a correlation between hard segment block content and sequence regularity to the adhesive and mechanical properties of the copolyesters. In addition, atomic force microscopy revealed the surface morphology of the copolyesters. These ion-containing segmented copolyesters permit modification of adhesive properties on both the molecular and morphological level.En ligne : http://www.pstc.org/files/public/LongTim_PolyestersAdhesiveTechnologies.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11922
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 18, N° 9 (09/2011) . - p. 30-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13289 - Périodique Bibliothèque principale Documentaires Disponible Preparations of novel flocculants and its applications in the paper-making wastewater / F. Zhao in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 4/2011 (07-08/2011)
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Titre : Preparations of novel flocculants and its applications in the paper-making wastewater Type de document : texte imprimé Auteurs : F. Zhao, Auteur ; J. L. He, Auteur Année de publication : 2011 Article en page(s) : p. 318-322 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : 'Polacrylamide cationique' 'Monomère fonctionnel' Flocculant 'Eaux usée fabrication papier' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Functional monomer [N-(2,4,4-trimethylpentan-2-yl)acrylamide] was synthesized and characterized by MS and NMR. A series of high molecular weight cationic polyacrylamides were prepared with N-(2,4,4-trimethylpentan-2-yl)acrylamide, acrylamide and methacryloxyethyltrimethyl ammonium chloride by copolymerization using complex initiation systems as catalysts in aqueous solution. Then they used as flocculants to treat the paper-making wastewater. The removal of the colour and the chemical oxygen demand (COD) in the treated waste water samples were determined. Results showed that flocculants could efficiently remove the color and the COD. The overall color and COD removal efficiencies reached as high as 80% and 85%, respectively. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11952
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 4/2011 (07-08/2011) . - p. 318-322[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013232 - Périodique Bibliothèque principale Documentaires Disponible Recent developments in UV cure epoxy acrylate oligomers / R. D. Kulkarni in PAINTINDIA, Vol. LXI, N° 7 (07/2011)
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Titre : Recent developments in UV cure epoxy acrylate oligomers Type de document : texte imprimé Auteurs : R. D. Kulkarni, Auteur ; M. E. Chaudhari, Auteur ; S. Mishra, Auteur Année de publication : 2011 Article en page(s) : p. 58-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages.
Epoxydes
Éther de diglycidyle et de bisphénol A
Oligomères
Réticulation (polymérisation)
Revêtements -- Séchage sous rayonnement ultravioletTags : 'UV curing' Oligomères 'Éther de diglycidyle et bisphénol A' 'Epoxy acrylate' 'Epoxyde cycloaliphatique' 'Monomère acrylate hybride' Index. décimale : 667.9 Revêtements et enduits Résumé : The performance properties and industrial applications of epoxy acrylate prepolymer based UV cure coatings are primarilygoverned by the nature of structural modification in backbone / en capping of pre polymer. The present review paper therefore covers the recent developments in the synthesis and characterisation of diverse epoxy acrylate oligomers including acrylate capped BPA/novolac epoxy, epoxidised oils and cycloaliphatic epoxy systems. The alkoxysilane, siloxane, adipic acid, fluorinated and phenyl phtalazinone modifications of epoxy diacrylate for obtaining special performance properties have been highlighted. Note de contenu : - Acrylated bisphenol-A epoxy oligomers
- Epoxy novolac (meth)acrylate oligomers
- Acrylated epoxidised oils and cycloaliphatic hybrid epoxy acrylates
- Modified speciality epoxy acrylate oligomers : Alkoxysilane modified epoxy acrylate oligomer - Polydimethylsiloxane epoxy acrylate oligomer - Adipic acid modified methacrylated epoxy resin - Epoxy methacrylate with phenyl phthalazinone backbone
- Applications of epoxy acrylate UV cure coatings (Reinhold S., 2006)
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11870
in PAINTINDIA > Vol. LXI, N° 7 (07/2011) . - p. 58-64[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13281 - Périodique Bibliothèque principale Documentaires Disponible