An alternative to alkyds / Harjoyti Kalita in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2015)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2015) . - p. 26-29 Titre : An alternative to alkyds : Novel biobased polymers for coatings applications Type de document : texte imprimé Auteurs : Harjoyti Kalita, Auteur ; Deep Kalita, Auteur ; Mukund Sibi, Auteur ; Bret J. Chisholm, Auteur Année de publication : 2015 Article en page(s) : p. 26-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères Composés insaturés Copolymérisation Réticulation (polymérisation) Revêtements:Peinture Tags : 'Poly-2-vinyl  ethylsoyate'  'Soybean  oil' Index. décimale : 667.9 Revêtements et enduits Résumé : High molecular weight linear polymers have been produced based on soybean oil and possessing a fatty acid ester side chain in the repeat unit. The unsaturation of the parent plant oil can be preserved, allowing coatings to cure by autoxidation, or be converted to other functional, groups to permit the use of other curing mechanisms. Note de contenu : - Alkyds and their modifications outlined - Novel technology yields high unsaturated polymers - Purified monomer yields colourless polymer - Copolymerisation extends range of properties - Polyols for PU coatings give high crosslink density - Versatile chemistry for high quality coatings En ligne : https://drive.google.com/file/d/1ce4dYni8Mlw9LsqotTl_QVZFi51x8k7n/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24261 [article]

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Novel alkyd-type coating resins produced using cationic polymerization / Samim Alam in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 633-646 Titre : Novel alkyd-type coating resins produced using cationic polymerization Type de document : texte imprimé Auteurs : Samim Alam, Auteur ; Deep Kalita, Auteur ; Anurad Jayasooriyamu, Auteur ; Shashi Fernando, Auteur ; Sathyabrata Samanta, Auteur ; James Bahr, Auteur ; Sermadurai Selvakumar, Auteur ; Mukund Sibi, Auteur ; Jessica Vold, Auteur ; Chad Ulven, Auteur ; Bret J. Chisholm, Auteur Année de publication : 2015 Article en page(s) : p. 633-646 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cyclohexyl vinyle ether Huile de soja Oxydation Polyaddition Polyvinyl éther Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Novel, partially bio-based poly(vinyl ether) copolymers derived from soybean oil and cyclohexyl vinyl ether (CHVE) were produced by cationic polymerization and investigated for application as alkyd-type surface coatings. Three different polymers were produced and cured clear coatings and free films characterized as a function of CHVE comonomer content and curing conditions. CHVE comonomer content was varied at 0, 25, and 50 wt%, and the three different curing conditions were 1 week at room temperature, 120°C for 1 h, and 150°C for 1 h. The results of the study showed that the thermal, mechanical, and physical properties of the coatings produced from these novel polymers varied considerably as a function of polymer composition and cure temperature. Overall, the results suggest a good potential for these novel copolymers to be used for coatings cured by autoxidation. Compared to conventional alkyd resins, which are produced by high temperature melt condensation polymerization, these poly(vinyl ether)s provide several advantages. These advantages include milder, more energy efficient polymer synthesis, elimination of issues associated with gelation during polymer synthesis, production of polymers with well-defined composition and relatively narrow molecular weight distribution, and elimination of film formation and physical property issues associated with entrained monomers, dimers, trimers, etc. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of homopolymers and copolymers of 2-VOES and CHVE - Preparation of free films and coated panels - Methods - Instrumentation - RESULTS AND DISCUSSION : Synthesis and characterization of poly(2-VOES-co-CHVE) copolymers - Viscoelastic properties and gel content of cured films - Mechanical properties of cured films - Properties of coated substrates DOI : 10.1007/s11998-015-9667-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9667-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24396 [article]

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Novel bio-based poly(vinylether)s for coating applications / Bret J. Chisholm in COATINGS WORLD, Vol. 20, N° 9 (09/2015)

[article]  inCOATINGS WORLD > Vol. 20, N° 9 (09/2015) . - p. 48-54 Titre : Novel bio-based poly(vinylether)s for coating applications Type de document : texte imprimé Auteurs : Bret J. Chisholm, Auteur ; Harjoyti Kalita, Auteur ; Deep Kalita, Auteur ; Samim Alam, Auteur ; Andrey Chernykh, Auteur ; Ihor Tarnavchyk, Auteur ; James Bahr, Auteur ; Sathyabrata Samanta, Auteur ; Anurad Jayasooriyamu, Auteur ; Shashi Fernando, Auteur ; Sermadurai Selvakumar, Auteur ; Dona Suranga Wickramaratne, Auteur ; Mukund Sibi, Auteur Année de publication : 2015 Article en page(s) : p. 48-54 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Copolymères -- Synthèse Polyvinyl éther Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Linear, soluble polymers were produced from unsaturated bio-based compounds using a carbocationic polymerization process. The unsaturated bio-based that were first converted to vinyl ether monomers and subsequently polymerized were plant oil triglycerides, cardanol, and eugenol. As a result of the much higher reactivity of the vinyl ether group compared to the unsaturation derived from the bio-based compounds and the ability to tailor the cationic polymerization process, polymerization was exclusively limited to vinyl ether groups. By oreserving the unsaturation derived from the bio-based compounds, the polymers could be crosslinked into insoluble coatings by autoxidation. In addition, the unsaturation can be converted to other functional groups, such as epoxy, which enable other crosslinking mechanisms. This document describes some of the polymers and coatings that have been produced with the technology. Note de contenu : - Polymers based on plant oils - Polymers based on cardanol - Polymers based on eugenol - FIGURES : 1. Schematic illustrating the autoxidation process - 2. Synthetic scheme used to produce a novel soybean oil-based vinyl ether monomer - 3. Polymerization system utilized for the production of plant oil-based polyvinyl ether - 4. Vinyl ether monomers copolymerized with 2-VOES - 5. Variation in Tg with comonomer content for 2-VOES-based copolymer films cured at room temperature by autoxidation - 6. Tack-free time as a function of PEGEVE repeat unit content, and an image of a coated glass panel partially laid over the NDSU logo - 7. Schematic illustrating cardanol ethyl vinyl ether synthesis - 8. Illustration of resonance stabilization of a radical generated by hydrogen abstraction by singlet oxygen - 9. Synthetic scheme used to produce an epoxidised version of poly(EEVE) - 10. Viscoelastic properties of the network derived from epoxidized poly(EEVE) and DETA - TABLES : 1. Data for cured films of polycardanol ethyl vinyl ether - Data for cured films of polyeugenol ethyl vinyl ether - 3. Data for coatings based on epoxidized polyEEVE and DGEBPA cast and cured on steel substrates Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29442 [article]

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