Nematic liquid crystalline polymers (LCP’s) are interesting anisotropic fluids, which may have some orientational order at rest (molecules tend to align in the same direction). Those polymers may be useful to obtain oriented materials with excellent mechanical, electrical and thermal properties. Its rheological, mechanical and optical properties may be changed by the particle inclusion, depending of the shape or anisotropy of the particles. Carbon nanotubes (CNT) are ideal candidates for the development of nanocomposites. In this research, we determinate the particle loading effect on the phase behavior of the HPC matrices using both rheological and polarized optical microscope measurements.