Rheological determination of the sol-gel transition during the aqueous synthesis of resorcinol-formaldehyde resins

Job, Nathalie; Panariello, Fabian; Crine, Michel; Pirard, Jean-Paul; Léonard, Angélique

doi:10.1016/j.colsurfa.2006.07.037

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Article (Scientific journals)

Rheological determination of the sol-gel transition during the aqueous synthesis of resorcinol-formaldehyde resins

Job, Nathalie; Panariello, Fabian; Crine, Michel et al.

2007 • In Colloids and Surfaces A: Physicochemical and Engineering Aspects, 293 (1-3), p. 224-228

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https://hdl.handle.net/2268/3792

DOI
10.1016/j.colsurfa.2006.07.037

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Keywords :

sol-gel transition; resorcinol-formaldehyde gel; rheology; viscoelasticity; gelation time

Abstract :

[en] The sol-gel transition of organic gels prepared by polycondensation of resorcinol (R) with formaldehyde (F) in presence of sodium carbonate (C) was monitored by small amplitude oscillatory measurements, at a single frequency. The gelation time (t(g)) was determined from the evolution of the storage (G) and loss (G") moduli versus time. The influence of two synthesis variables, the resorcinol/sodium carbonate ratio (R/C) and the synthesis temperature (7), was investigated. The gelation time was found to decrease with increasing synthesis temperature and decreasing R/C ratio. The apparent activation energy of the reactional system leading to the gelation, calculated from the gelation times obtained between 50 and 90 degrees C, was found to be close to 80 kJ mol(-1) and independent of the R/C ratio. (c) 2006 Elsevier B.V. All rights reserved.

Disciplines :

Chemistry
Chemical engineering

Author, co-author :

Job, Nathalie ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique

Panariello, Fabian

Crine, Michel ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires

Pirard, Jean-Paul ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique

Léonard, Angélique ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée

Language :

English

Title :

Rheological determination of the sol-gel transition during the aqueous synthesis of resorcinol-formaldehyde resins

Alternative titles :

[fr] Détermination de la transition sol-gel lors de la synthèse de résines résorcinol-formaldéhyde en milieu aqueux

Publication date :

01 February 2007

Journal title :

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN :

0927-7757

eISSN :

1873-4359

Publisher :

Elsevier Science Bv, Amsterdam, Netherlands

Volume :

293

Issue :

1-3

Pages :

224-228

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFR-4KHJK48-2&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=b0a9fe0d181c0c77ba0bdb5375f46cb7

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBi :

since 06 January 2009

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