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 104
... polymer in 1,1,2 - trichloroethane at 25 ° C . The solution was measured at high shear rates and to high strains . o ( N / m2 ) 0.8 25s 50 s O 0.6 ♡ A 75 s ♡ 100 s 0.4 0.2 in 0/0 -3 -5 0.0 0 500 1000 1500 2000 2500 3000 3500 4000 0 ...
... polymer in 1,1,2 - trichloroethane at 25 ° C . The solution was measured at high shear rates and to high strains . o ( N / m2 ) 0.8 25s 50 s O 0.6 ♡ A 75 s ♡ 100 s 0.4 0.2 in 0/0 -3 -5 0.0 0 500 1000 1500 2000 2500 3000 3500 4000 0 ...
Page 108
... polymer molecules and therefore is dependent on the shear rate . This behaviour is also found at other polymer concentrations in 1,1,2- trichloroethane . The absolute values of the yield stress are extremely low , only a minute stress ...
... polymer molecules and therefore is dependent on the shear rate . This behaviour is also found at other polymer concentrations in 1,1,2- trichloroethane . The absolute values of the yield stress are extremely low , only a minute stress ...
Page 111
... polymer in 1,1,2 - trichloroethane . The mechanical model consists of a spring ( G1 ) representing the retracting forces within a deformed network , a yield element ( σ ) representing the break down point of the network and two dashpots ...
... polymer in 1,1,2 - trichloroethane . The mechanical model consists of a spring ( G1 ) representing the retracting forces within a deformed network , a yield element ( σ ) representing the break down point of the network and two dashpots ...
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