The phase diagrams of the cyanoethyl cellulose (CEC) - DMAA, CEC - DMFA, CEC - TFAA/methylene chlorid, hydroxypropylcellulose (HPC) - ethanol, HPC - acetic acid, HPC - DMAA, HPC - DMFA and HPC - water systems both under magnetic and mechanical field and in its absence have been built. As the polarity of the solvent molecules increases and the molecular mass of the polymers decreases, the boundary curves shift to the region of the higher concentrations and lower temperatures. The solution straining and the magnetic field applying results in the domain structure formation and the increase of the liquid crystalline phase appearance temperature. As the molecular mass of the polymer increases, the ability of its macromolecules to orient in magnetic and in shear stress fields decreases.