| Titre : |
The investigation of butyl acrylate grafting using model alkyds |
| Type de document : |
texte imprimé |
| Auteurs : |
Qianhe Wang, Auteur ; Mark D. Soucek, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 221-233 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Copolymères alkyde-acrylate de butyle
Copolymères greffés
Homopolymères
Homopolymérisation
Radicaux libres (chimie)
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Four model alkyds (stearic, oleic, linoleic, and linolenic model alkyds) were copolymerized with butyl acrylate (BA) in the presence of AIBN or BPO. 1H and 2D gHMQC NMR, Soxhlet extraction, and gas chromatography were used to characterize model alkyd-BA systems. It was found that mechanisms of grafting BA onto model alkyds were dependent on the structure of fatty acids in the model alkyds. In stearic model alkyd hybrid systems, BA homopolymer was the predominate pathway with minimal grafting via hydrogen abstraction from polyol backbone followed by termination with propagating BA radicals. Oleic model alkyd-BA systems improved the degree of grafting by direct addition of the BA free radical to the double bonds. Severe retardation of BA polymerization was observed in both linoleic and linolenic model alkyd–BA systems due to the presence of double allylic sites. A chain transfer process subsequently dominates the other free radical pathways leading to a high degree of grafting. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Instrumentation - Synthesis of fatty acid-based model alkyds - Synthesis of model alkyl-BA copolymers - Separation of grafted alkyd and BA homopolymer - Measurement of hydrogen abstraction by initiator
- RESULTS AND DISCUSSION : 1H NMR - 2D gHMQC NMR - Quantitative evaluation of graft and homopolymerization - Evaluation of hydrogen abstraction of initiator - Stearic model alkyd systems - Oleic model alkyd systems - Linoleic and linolenic model alkyd systems |
| DOI : |
10.1007/s11998-018-0140-x |
| En ligne : |
https://link.springer.com/article/10.1007/s11998-018-0140-x |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31993 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 221-233
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