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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Sucrose octaesters as reactive diluents for alkyd coatings / Andriy Popadyuk in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 3 (05/2018) . - p. 481-488 Titre : Sucrose octaesters as reactive diluents for alkyd coatings Type de document : texte imprimé Auteurs : Andriy Popadyuk, Auteur ; Austin Breuer, Auteur ; James Bahr, Auteur ; Ihor Tarnavchyk, Auteur ; Andriy Voronov, Auteur ; Bret J. Chisholm, Auteur Année de publication : 2018 Article en page(s) : p. 481-488 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diluants Haut extrait sec Polyalkydes Revêtements Tags : 'Diluant  réactif'  'Revêtement  alkyde'  'Sucrose  polyester'  de  soja'  'Ester  d'acide  gras  saccharose'  'Haute  teneur  en  solides' Index. décimale : 667.9 Revêtements et enduits Résumé : Sucrose octasoyate (SS8) was investigated as a reactive diluent for a medium oil alkyd (MOA). SS8, which is derived from sugar and soybean oil, is 100% biobased, nontoxic, and biodegradable. As a result of its unique molecular architecture, it was expected that SS8 would be an excellent reactive diluent for alkyd coatings. The experiment conducted basically involved the incremental replacement of the MOA with SS8, while maintaining essentially equivalent solution viscosity. The properties of cured coatings were determined using industry standard methods. In general, it was found that SS8 could be used to reduce volatile organic compound content of the coatings, while also reducing drying time (i.e., tack-free time), increasing solvent resistance, and increasing impact resistance. Of the properties measured, the only cured film property that was negatively affected by the use of SS8 was the König pendulum hardness. However, the reduction in König pendulum hardness was only observed when the amount of MOA replaced by SS8 was greater than 10 wt%. Overall, these initial results suggest that SS8 is a very good reactive diluent for alkyd coatings. Note de contenu : - Fig. 1 : The chemical structure of a number of molecules that have been described in the literature as potential reactive diluents for alkyd coating - Fig. 2 : representative chemical structure of an SS8 molecule. It should be understood that the chemical structure of the soy-based fatty acid ester molecules around a single sucrose core will vary and the distribution will depend on the fatty acid ester profile of the soybean oil used as a starting material - Fig. 3 : Tack-free time as a function of SS8 content in the coating. Tack-free time was determined according to ASTM D1640 - Fig. 4 : Pendulum hardness as a function of SS8 content for the MOA/SS8 coatings - Fig. 5 : The variation in solvent resistance with SS8 content for the MOA/SS8 coatings - Fig. 6 : Direct impact resistance as a function of SS8 content for the MOA/SS8 coatings - Fig. 7 : The variation in reverse impact resistance with SS8 content for the MOA/SS8 coatings - Fig. 8 : relative comparison of the properties of coatings 90/10 MOA/SS8 and 75/25 MOA/SS8 to coating 100/0 MOA/ SS8. The spider chart shown in this figure was constructed such that the data point farthest from the center along any given axis is given a value of 1.0 and corresponds to the coating that had the most desired value for that property. For example, coating 75/25 MOA/SS8 exhibited the highest solvent resistance, highest direct impact resistance, highest reverse impact resistance, lowest VOC content, and shortest drying time (i.e., tack-free time). As a result, a value of 1.0 was assigned to each of these properties for coating 75/25 MOA/SS8. However, for pendulum hardness, coating 100/0 MOA/SS8 exhibited the highest pendulum hardness, and, thus, a value of 1.0 was assigned to this coating on the hardness axis. The other two data points on each axis represent the magnitude of the property for the other two coatings as a fraction relative to the coating with the most desirable value for the property - Table 1 : A description of the raw materials used for the study - Table 2 : Compositions of the coating solutions produced - Table 3 : The coating properties measured and the ASTM methods used to test them - Table 4 : The solids and VOC content of the coating solutions produced and the biobased content of the cured films derived from the coating solutions - Table 5 : Drying/curing characteristics of the coatings as determined using ASTM D1640 DOI : 10.1007/s11998-017-0016-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0016-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30744 [article]

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