| Titre : |
Branching theories and thermodynamics used to help designing precursor architectures and binder systems |
| Type de document : |
texte imprimé |
| Auteurs : |
K. Dusek, Auteur ; R. Barsotti, Auteur ; J. Huybrechts, Auteur ; L. A. Lewin, Auteur ; M. Duskova-Smrckova, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
p. 123-131 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cyclisation (chimie)
Gélification
Liants
Réseaux polymères
Réticulation (polymérisation)
Revêtements organiques
Thermochimie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Cross-linking hydroxy-functional stars and copolymer precursors with a triisocyanate and associated structural changes were studied theoretically and experimentally. The model of network formation was based on the statistical generation of structures from units which were in different reaction states. The differences in gel point conversion and cross-link density were interpreted in terms of precursor functionality and functionality distribution, and differences in the reactivity of functional groups. Hydroxy-functional copolymer systems containing precursors of the same number-average functionality gel at lower conversions than stars which are monodispersed mainly due to functionality distribution. The structure of copolymers characteristic of several internal cross-links contributes more to the concentration of elastically-active network chains than stars with a single cross-link. Cyclization accompanies intermolecular cross-linking; its intensity is higher for copolymer systems compared with stars. |
| Note de contenu : |
- Experimental systems and methods : Precursors - Methods
- Results and discussion
- Network build-up from precursors differing in architecture - theoretical description
- Structure evolution for cross-linking of precursors of various architectures
- Thermodynamic factors |
| DOI : |
10.1007/BF02699642 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/BF02699642.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5383 |
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B2 (06/2006) . - p. 123-131
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Branching theories and thermodynamics used to help designing precursor architectures and binder systems in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
