Copolymers of aniline with 3-trifluoromethyl aniline functional polymers was synthesized using soft template polymerization. The surface morphology and crystalline nature of the materials are analysed using SEM, XRD analysis. The absorption bands around 320 and 620 nm in UV-vis spectrum indicate the presence of π-π* and n-π* transitions. SEM analysis represent the clustered or agglomerated spherical particles varying size from 100nm to 200nm. The amorphous nature of the polymers is confirmed by XRD pattern. The electrical nature of this materials ranges from 1.86 × 10–9 to 2.86 × 10–11 Scm-1 due to the steric effect of trifluoromethyl group. The relative humidity sensing characteristics was observed which is based on the resistance variations. This is due to the effective interaction of the water molecules with polymer matrix. The decreased in resistance is noticed 400 to 230 MΩ when the relative humidity (% RH) changes from 17 to 47%. Finally, this results clearly evidenced the functional polymers can be used in sensor industry.