====== Gas-loaded Polymer Viscosity ======

===== Gas-loaded Polymer Viscosity =====

**Path:** Main menu > Material > Create gas-loaded Polymer…. Tab: Viscosity\\
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**Path:** Main menu > Material > Edit Material (file)…. Tab: Viscosity\\
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**Figure:** Tab Viscosity gas-loaded polymers

 

There is only one option to calculate the viscosity of a gas-loaded polymer in SIGMA. So, the Carreau function is preselected for the viscosity function. 

 

Carreau:

$n = \frac{A \cdot a_T \cdot a_{gas}}{(1 + B \cdot a_T \cdot a_{gas} \cdot \dot{\gamma})^C}$

 

You can choose from different temperature dependence.
  * WLF ($T_b, T_s$) 
  * WLF ($C_1, C_2$) 
  * Arrhenius 
 

 

These different models for the temperature shift factor a_T are described in detail in subchapter rheological data.