New technique for coprecipitation of organic dye with polymer under high vacuum

A new technique for coprecipitation of organic dye with polymer using high vacuum (HV) conditions has been developed. Rapid evaporation of solvents from a solution of dye dissolved polymer under HV is essential for controlling the association of dye molecules in the solidified polymer matrices in contrast to a slow evaporation method under atmospheric conditions. Varied sizes of the association in densely dissolved dye/polymer systems have been experimentally observed.