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

in Colloids and Surfaces A : Physicochemical and Engineering Aspects (2007), 293(1-3), 224-228

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 ... [more ▼]

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. [less ▲]

Rheological properties of microfluidized oil-in-water emulsions stabilized by dairy components.

Poster (2007, October 11)

Rheology of compatibilized immiscible viscoelastic polymer blends

in Rheologica Acta (2001), 40(1), 10-22

Rheological behavior of a PS/PE model viscoelastic immiscible blend compatibilized by two types of inter facial modifiers was investigated. Dynamic, steady shear, and transient experiments were performed ... [more ▼]

Rheological behavior of a PS/PE model viscoelastic immiscible blend compatibilized by two types of inter facial modifiers was investigated. Dynamic, steady shear, and transient experiments were performed to probe the effect of the interfacial modification on the rheological behavior of the blend. While the effect was relatively small in dynamic and steady shear experiments, significant signature of the presence of the copolymer was observed in transient experiments after start up of shear flow. The magnitude of the departure from Doi-Otha theory (worked out for non-compatibilized blends) was evaluated. [less ▲]

Rhétorique

in Grassin, Jean-Marie (Ed.) Dictionnaire international des termes littéraires [en ligne] (2009)

Rhétorique de l’explication dans le récit fantastique. Une lecture de La ruelle ténébreuse de Jean Ray

in Etudes francophones (2008), 23/1-2(printemps-automne 2008), 10-33

Le genre fantastique, contrairement à l'opinion spontanée, repose, dans ses réalisations majeures, sur une logique rigoureuse dans la conduite de l'explication surnaturelle. Le présent article propose un ... [more ▼]

Le genre fantastique, contrairement à l'opinion spontanée, repose, dans ses réalisations majeures, sur une logique rigoureuse dans la conduite de l'explication surnaturelle. Le présent article propose un modèle de fonctionnement de la rhétorique de cette explication à partir d'une lecture approfondie de "La ruelle ténébreuse", l'un des contes les plus réussis du belge Jean Ray. [less ▲]

Rhétorique de l'image dans le discours scientifique

in Tarasti, Eero (Ed.) Communication: Understanding/Misunderstanding Proceedings of the 9th Congress of the IASS/AIS - Helsinki-Imatra (2009)

Rhétorique des figures visuelles et argumentation par images dans le discours scientifique

in Protée (2010), 38(1),

In our essay we compare two semiotic perspectives on visual rhetoric: the first one named rhetoric of visual figures is elaborated by Groupe Mu in his Traité du signe visuel (1992) and the second one ... [more ▼]

In our essay we compare two semiotic perspectives on visual rhetoric: the first one named rhetoric of visual figures is elaborated by Groupe Mu in his Traité du signe visuel (1992) and the second one, named visual argumentation, is the product of semiotics of discourse (École de Paris). The one concerns the rhetoric figure as a deviation from a cultural rule, the other one concerns the argumentation produced by the disposition of visual and verbal texts in a syncretic discourse. The discourse taken into account in this essay is the scientific one and our analysis focus on the black holes’ iconography in astrophysics popular literature. [less ▲]

Rhétorique médiatique de l'oubli. L'obsession du présent dans L'Express

in Wolf, Nelly (Ed.) Amnésies françaises à l'époque gaullienne (1958-1981). Littérature, cinéma, presse, politique (2011)

Une rhétorique par objet: les mimétismes chez Francis Ponge

Doctoral thesis (2008)

Les recueils de Francis Ponge Le Parti pris des choses et Pièces sont analysés poème par poème à la recherche de mimétismes, c'est-à-dire des "procédés stylistiques de formes variables visant à minimiser ... [more ▼]

Les recueils de Francis Ponge Le Parti pris des choses et Pièces sont analysés poème par poème à la recherche de mimétismes, c'est-à-dire des "procédés stylistiques de formes variables visant à minimiser l'arbitraire du signe, c'est-à-dire à motiver quelque peu le langage en établissant un mien entre la forme du plan du contenu et celle du plan de l'expression". [less ▲]

"La rhétorique, la sémiotique et le comique"

in Recherches sémiotiques/Semiotic Inquiry (1994), 14(3), 81-101