Introduction to Colloid and Surface Chemistry |
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Page 167
... viscoelastic nature of the material , is set up between stress and strain . For Hookean elastic solids the stress and strain are in phase , whereas for purely viscous liquids the strain lags 90 ... viscoelastic materials 167 VISCOELASTICITY.
... viscoelastic nature of the material , is set up between stress and strain . For Hookean elastic solids the stress and strain are in phase , whereas for purely viscous liquids the strain lags 90 ... viscoelastic materials 167 VISCOELASTICITY.
Page 168
... Viscoelastic polymer 1 Crystalline or glass - like solid 106 Time , sec Figure 9.8 . The time - dependence of deformations under constant stress on the time scale covering the response of such systems to external stresses . On this ...
... Viscoelastic polymer 1 Crystalline or glass - like solid 106 Time , sec Figure 9.8 . The time - dependence of deformations under constant stress on the time scale covering the response of such systems to external stresses . On this ...
Page 170
... viscoelastic limits are , therefore , those which are readily work softened . The Weissenberg Effect A characteristic of viscoelastic behaviour is the tendency for flow to occur at right angles to the applied force . An extreme example ...
... viscoelastic limits are , therefore , those which are readily work softened . The Weissenberg Effect A characteristic of viscoelastic behaviour is the tendency for flow to occur at right angles to the applied force . An extreme example ...
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acid adsorbed adsorption adsorption isotherm approximately aqueous behaviour Brownian calculated cell charged surface chemisorption cm-¹ cm³ coefficient colloidal dispersions colloidal particles colloidal systems constant contact angle counter-ions curve cylinder decreases deflocculated deformation depends detergent diffusion dispersion medium distance droplets effect electrical double layer electrode electrolyte emulsifying equation equilibrium example Figure film flocculation flocculation concentration flow hydrocarbon chains hydrophilic increase interaction interface intrinsic viscosity ionic ions isotherms light scattered material measured membrane method micelles mixed film molecular weight molecules monolayer monomolecular motion O/W emulsions orientated osmotic pressure physical adsorption plate polymer polymerization pores porous potential energy potential gradient protein ratio relative repulsive sample sedimentation shear soaps sodium solid surface soluble solution solvation solvent spherical particles stability Stern layer stress surface tension surface-active surfactant temperature theory thermal thixotropic valency vapour pressure velocity viscoelastic viscometer volume W/O emulsions Waals wetting zero zeta potential