Kinematic viscosity: V = K * (t-Δt)
Dynamic viscosity: η = K * (t - Δt) * ρ
Limit Viscosity --- ISO 1628/1 Schulz-Blaschke formula: [η] = I / (1 + K '· I · C)
Ultimate Viscosity --- Huggins Formula: [η] = [(1 + 4KHηsp) 1/2 -1] / 2KH · C
Ultimate Viscosity --- Kraemer Formula: [η] = [1 - (1 - 4β lnηr) 1/2] / 2 β · C
Solvent-Solomon-Ciuta equation: [η] = [2 (ηsp-lnηr)] 1/2 / C
Limiting viscosity number --- Malone Maron formula: [η] = (γlnηr + ηsp) / (1 + γ) · C
The ultimate viscosity --- Dong's formula [η] = (2lnηr + ηsp) / 3 · C.
Limit Viscosity --- Billmeyer formula: [η] = (3lnηr + ηsp) / 4 · C
Limiting viscosity - Martin Martin Log I = log [η] + K [η] · C.
Limit Viscosity --- Linear Extrapolation: Measure the viscosities and logarithm viscosities of more than three different concentrations of dilute polymer solutions for linear extrapolation to determine the limiting viscosity.
Relative viscosity: ηr = (t - Δt) / (t0 - Δt0)
Viscosity number: I = (ηr-1) / C
K value for polyvinyl chloride and polyvinyl alcohol according to the Fickentscher formula: K = 1000 {a - 1 + [1 + (2 / C + 2+ a) a] 1/2} / (150 + 300C)
Where: a = 1.5 logηr
The above limit viscosity number measurement, such as the input Mark -houwink formula K, α value can be calculated viscosity average molecular weight.
M = ([η] / K) 1 / α
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