Structure development of resorcinol-formaldehyde gels: Microphase separation or colloid aggregation

Gommes, Cedric J. and Roberts, Anthony P. (2008) Structure development of resorcinol-formaldehyde gels: Microphase separation or colloid aggregation. Physical Review E, 77 4: 041409.1-041409.13. doi:10.1103/PhysRevE.77.041409

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Author Gommes, Cedric J.
Roberts, Anthony P.
Title Structure development of resorcinol-formaldehyde gels: Microphase separation or colloid aggregation
Journal name Physical Review E   Check publisher's open access policy
ISSN 1539-3755
Publication date 2008-04-23
Sub-type Article (original research)
DOI 10.1103/PhysRevE.77.041409
Open Access Status File (Publisher version)
Volume 77
Issue 4
Start page 041409.1
End page 041409.13
Total pages 13
Place of publication New York, USA
Publisher Americal Physical Society
Collection year 2009
Language eng
Subject C1
970101 Expanding Knowledge in the Mathematical Sciences
019999 Mathematical Sciences not elsewhere classified
0306 Physical Chemistry (incl. Structural)
Abstract Time-resolved small-angle x-ray scattering (SAXS) is used to follow the formation of resorcinol-formaldehyde (RF) gels. An existing morphological model based on Gaussian random fields, and validated on RF aerogels, is generalized to analyze the data. The generalization is done in two different ways, one being relevant to colloid aggregation and the other to microphase separation. The SAXS data do not enable discrimination between the two mechanisms of gel formation, which shows that aggregation and microphase separation can generate very similar morphologies at the length scales explored by SAXS. Furthermore, physical arguments suggest that, in the case of RF gels, aggregation and microphase separation can be regarded as two idealizations of the same complex physical process.
Keyword Aerogels
Aggregation
Colloids
Gels
Organic compounds
Phase separation
X-ray scattering
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
 
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Citation counts: TR Web of Science Citation Count  Cited 24 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 27 Mar 2009, 11:07:24 EST by Marie Grove on behalf of Faculty of Science