Application of the Kwei equation to the glass transition of dye solute-polymer blends

The effect of a number of dyes on the glass transition temperatures of a va riety of polymers has been investigated. The glass transition temperatures of each dye-polymer blend were compared to the Kwei equation to obtain Kwei q parameters. It was demonstrated that the q parameter correlated to dye-p olymer interaction independent of the variation in dye structure and polyme r composition. The highest q parameters were obtained as the solubility par ameters of dye and polymer approached corresponding to the maximum dye-poly mer affinity. (C) 1999 Elsevier Science Ltd. All rights reserved.