| Titre : |
A new approach to correlate emission of free formaldehyde of urea formaldehyde resin synthesised under different reaction conditions |
| Type de document : |
texte imprimé |
| Auteurs : |
Tirthankar Jana, Auteur ; Somnath Ray, Auteur ; Suhas Kumar Chakrabarti, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 75-80 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alkylation
Catalyse
Copolymère urée formaldéhyde
Copolymères -- Synthèse
Formaldéhyde
Méthylolation
Réduction des composés organiques volatils
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A novel approach has been taken to establish a correlation between reaction conditions and free formaldehyde of urea formaldehyde resin (UF resin). UF resins were synthesised under acid and base catalyzed condition at different pH which is the most controlling factor for reaction between urea and formaldehyde as welI as the extent of unreacted formaldehyde of the final resin.The unreacted formaldehyde i.e. free formaldehyde of the resins after synthesis has been measured. The functional groups of the final resins and the probable reaction techniques were characterised using FTIR spectroscopy, 1H NMR spectroscopy along with other physical properties. The effect of reaction conditions on molecular weight and its distribution were studied using gel permeation chromatography. These results are further supported after curing the resins with alkyd and correlated with cured film properties like hardness, gloss, impact resistance, hydrolytic stability etc.
Based on these experiments it can be concluded that the extent of formaldehyde emission from a UF resin can be predicted by knowing the actual reaction conditions i.e. pH during reaction, type of reaction etc. Such type of correlation is an important guideline for lowering of formaldehyde emission in any UF resin. |
| Note de contenu : |
- EXPERIMENTAL
- SYNTHESIS OF UF RESIN
- CHARACTERIZATION OF UF RESIN
- RESIN REACTIVITY AND FILM PROPERTY STUDY
- RESULTS AND DISCUSSION
- METHYLOLATION
- ACID CATALYZED MECHANISMS
- ALKYLATION
- CORRELATION OF FREE FORMALDEHYDE OF UREA FORMALDEHYDE RESIN IN DIFFERENT COMPOSITION |
| En ligne : |
https://drive.google.com/file/d/1a20yfIdNuErQ-LBYhc9x-0IDz-A-yX3Z/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24156 |
in PAINTINDIA > Vol. LXV, N° 4 (04/2015) . - p. 75-80
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