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Aminallah Rabia, Madeleine Djabourov, Francois Feuillebois, Thierry Lasuye
Rheology of wet pastes of PVC particles
Appl. Rheol. 20:1 (2010) 11961 (9 pages)
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The present work deals with the study of the rheological behaviour of PVC (polyvinylchloride) pastes containing particles of
~ 150 μm in diameter obtained by polymerization in suspension.The rheological properties of the PVC pastes were characterized
by creep experiments using 6-bladed vane geometry. The pastes show a very small compliance and a very narrow linear
domain. The effects of temperature, of interstitial liquid and of saturation level of the wet paste were studied in detail and it
was found that they significantly modify the creep behaviour. Other techniques allowed us to characterise rearrangements
of the particles under load, in compression, by their oedometric modulus and by the failure stresses measured using a shear
box. A very high oedometric modulus was measured (20 MPa) and by application of the Mohr-Coulomb criterion the internal
friction coefficient (μ ~ 0.6) and the cohesion of the materials were deduced.We conclude from this investigation that the
interfacial properties of the grains play a major role in the behaviour of the wet pastes under shear or in compression. The
paper illustrates the difficulties in measuring the rheological and the structural properties of jammed systems made from
non-ideal (real) particles and reveals the key parameters in studying such media.
► Cite this publication as follows:
Rabia A, Djabourov M, Feuillebois F, Lasuye T: Rheology of wet pastes of PVC particles, Appl. Rheol. 20 (2010) 11961.
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