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Area of Science:

  • Materials Science
  • Polymer Physics
  • Soft Matter Physics

Background:

  • Elastomeric mixtures containing mesogenic and isotropic components exhibit complex phase behavior.
  • Understanding the interplay between mechanical deformation, nematic order, and concentration is crucial for predicting material properties.

Purpose of the Study:

  • To formulate and analyze a comprehensive model for elastomeric mixtures.
  • To investigate the combined effects of mechanical deformation, nematic order parameter dynamics, and concentration inhomogeneities.

Main Methods:

  • Development of a theoretical model incorporating mechanical deformation, nematic order parameter, and concentration.
  • Numerical simulations of the model starting from ordered nematic and quenched isotropic states.

Main Results:

  • The uniform nematic state can undergo a long-wave instability leading to nematic-isotropic demixing.
  • Coupling between mesogen concentration and nematic order parameter significantly influences domain shape and orientation during demixing.

Conclusions:

  • The developed model provides insights into the phase separation behavior of elastomeric mixtures.
  • The study highlights the critical role of coupled order parameter and concentration dynamics in dictating microstructural evolution.