Rheological Behaviours of Polyimide Precursor in Organic Solvents for Coating on Silica Optical Fibre

The role of different organic polar solvents containing methylene group on rheological behaviour of coated polyimide precursor on silica optical fibre were investigated at different concentrations and temperatures with respect to corresponding original precursor itself. The influence of keto-methyl and N-methyl polar groups are in different chemical structure of organic solvents into the coated precursor against-solvent dilution process has been explored. The interaction in between functional groups moiety containing into precursor and polar methyl group of solvents was also analysed. A substantial knowledge of rheology into coating precursor of polyimide is an important issue to coat successfully into optical fibre.