A Rheological and Structural Study of Polymer NetworksContents of this doctoral dissertation include: primary polymer molecules with a mondisperse distribution of the molecular weights, crosslinks of any functionality, primary polymer molecules with a disperse distribution of the molecular weights, the sol fraction, number and weight average degrees of polymerization, Schulz-Zimm distribution, fractions of ideal networks and dangling ends, molar masses between the crosslinks |
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Page 108
Marcel Willem Cornelis Petrus Franse. At high shear rates the slopes of the stress - shear rate curves are close to 1 at all measuring temperatures . However , a decrease of the temperature from 60 to 30 ° C causes the appearance of a ...
Marcel Willem Cornelis Petrus Franse. At high shear rates the slopes of the stress - shear rate curves are close to 1 at all measuring temperatures . However , a decrease of the temperature from 60 to 30 ° C causes the appearance of a ...
Page 109
... stress plateau at low shear rates to extend to higher shear rates . The stress - strain rate curves were fitted with a Bingham yield stress model , in order to gain more insight into the quantitative values of the yield stress and the ...
... stress plateau at low shear rates to extend to higher shear rates . The stress - strain rate curves were fitted with a Bingham yield stress model , in order to gain more insight into the quantitative values of the yield stress and the ...
Page 112
... stress , that remains in the system after cessation of the flow in the transient experiments at high shear rates , appears to be higher than the yield stress of the polymer network . For example , for a 9 % w / w solution of discotic ...
... stress , that remains in the system after cessation of the flow in the transient experiments at high shear rates , appears to be higher than the yield stress of the polymer network . For example , for a 9 % w / w solution of discotic ...
Common terms and phrases
1,1,2-trichloroethane active network chains average crosslinking index average molar mass average molecular weight calculated crosslink functionality crosslinked system crosslinks per unit curves cycle rank dangling ends decrease deformation degree of polymerisation discotic side chain discotic side-chain polymers disperse distribution dynamic elastically active network ended mesogens equilibrium shear modulus figure Flory fraction of dangling fraction of ideal Franse frequency high shear rates increase kg/mol mijn molecular weight distribution monodisperse distribution N/mē network of polymer network parameters Nijenhuis number and weight number average degree number average molecular number of crosslinks physical network poly(vinyl chloride polydispersity index polymeric primary polymer molecules relationship rheological measurements Schulz-Flory distribution Schulz-Zimm distribution shear rates side chain polymer sol fraction solubility parameter solution of discotic solvent storage modulus strain structure substituting equation temperature tetrafunctional crosslinking unit volume values viscoelastic viscosity w/w solution w₁ weight average crosslinking weight average degrees weight average molecular yield stress zijn