Polymer Melt Viscosity & Cross-WLF Rheology Calculator

Model shear-thinning pseudoplastic behavior, zero-shear viscosity (η0), critical shear stress, and temperature-dependent viscosity per the Cross-WLF formulation.

Polymer Resin Preset & Shear Rate

Thermoplastic Resin Data Preset:

Operating Shear Rate γ_dot (1/s): Runner ~ 1k-10k; Gate ~ 10k-100k s⁻¹

Melt Processing Temp T (°C):

Cross-WLF Model Coefficients

Power Law Slope (1 - n): n = 0.32 (Shear thinning index)

Critical Shear Stress τ* (Pa):

Reference Viscosity D1 (Pa·s):

Transition Temp D2 / Tg (°C):

Melt Viscosity & Shear Thinning State

Apparent Melt Viscosity η:

—

— Poise

Zero-Shear Newtonian Viscosity η0:

—

Thinned by: — x

Melt Shear Stress τ:

—

— bar

Viscous Dissipation (Shear Heating):

—

Flow Regime & Processing Diagnosis:

—

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Polymer Melt Viscosity & Cross-WLF Rheology Calculator

Polymer Resin Preset & Shear Rate

Cross-WLF Model Coefficients

Melt Viscosity & Shear Thinning State

Frequently Asked Questions