Experimental investigation of the spreading of viscoplastic fluids on inclined planes
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This paper develops a new approach to computing the shear rate from the torque and rotationalvelocity measurements in a Couette rheometer. It is based on wavelet-vaguelette decomposition (WVD) proposed by Donoho (Donoho, D., Appl. Comput. Harmon. Anal. 2, ...
Conductometry and potentiometry have been employed to examine the influence of macromol. parameters and chem. structure on the electrochem. behavior of flexible polyelectrolytes with finite chain length in the concn. range 10-6 < cp < 10-2 monomol.l-1. For ...
The rheological properties in solution, in shear and in uniaxial elongation of poly(ethylene terephthalate) (PET) reacted together with hyperbranched polymers (HBPs) were investigated. Two different PET grades, of low and high molecular weights, were compo ...
The equilibrium rheological properties of a range of isotropic exfoliated and intercalated hyperbranched polymer (HBP)/montmorillonite (MMT) clay nanocomposites have been investigated using low strain oscillating shear measurements at temperatures above th ...
The effects of applied radial electric fields on the stability of ion temperature gradient (ITG) modes and trapped particle modes are investigated with a full radius gyrokinetic formulation in both axisymmetric and helically symmetric configurations. The v ...
A method based on Tikhonov regularization is used to process the volumetric flow rate against pressure drop data of different fruit purees generated by large-scale flow loops. These data are converted into shear-rate-against-shear-stress curves. Curves fro ...
The use of a tetrafunctional epoxy-based additive to modify the molecular structure of poly(ethylene terephthalate) (PET) was investigated with the aim of producing PET foams by an extrusion process. The molecular structure analysis and shear and elongatio ...
In the devolatilization step of polymn. processes, extruders are widely used for surface renewal. The LIST co-rotating processor (CRP) studied in the present paper, shows high performance for devolatilization processes. A sepn. model is correlated with exp ...
The title polymers of dialkenyldialkylammonium compds., useful in the coating and prepn. of paper, are prepd. in high space-time yield by the continuous or batch addn. of H2O-insol. azo compd. initiators in MeOH or DMF to aq. monomers. Thus, adding ten 2-m ...
(Akademie der Wissenschaften der DDR, Institut fuer Polymerenchemie, Ger. Dem. Rep.).1984
Two:dimensional time-dependent calculations for a molecular model of finite extensibility in the journal-bearing geometry are presented. The flow is considered to be incompressible and isothermal. The momentum conservation equation is integrated using a ti ...
