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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Results 1-3 of 4
Page 108
... stress plateau at low shear rates . These results indicate the presence of a yield stress in the system at temperatures of 40 ° C and lower . [ 19 ] These yield stresses can be explained as follows . During a deformation , at first the ...
... stress plateau at low shear rates . These results indicate the presence of a yield stress in the system at temperatures of 40 ° C and lower . [ 19 ] These yield stresses can be explained as follows . During a deformation , at first the ...
Page 109
... yield stress model , in order to gain more insight into the quantitative values of the yield stress and the viscosity of the system at high shear rates . This model is appropriate for the sharp transition of the stress plateau at low ...
... yield stress model , in order to gain more insight into the quantitative values of the yield stress and the viscosity of the system at high shear rates . This model is appropriate for the sharp transition of the stress plateau at low ...
Page 112
... yield stress of the polymer network . For example , for a 9 % w / w solution of discotic side chain polymer at 25 ° C , this remnant stress is on average 0.095 N / m2 , whereas the yield stress is 0.029 N / m2 . The high shear rates in ...
... yield stress of the polymer network . For example , for a 9 % w / w solution of discotic side chain polymer at 25 ° C , this remnant stress is on average 0.095 N / m2 , whereas the yield stress is 0.029 N / m2 . The high shear rates in ...
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/m² 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