Concentration distributions of p-aminoazobenzene (PAAB) were measured by the use of repeated laminates and compared with those predicted by the theoretical treatment¹⁾. Film rolls composed of two different component films were used in the measurements.
Over all diffusion coefficients D_ov through the repeated laminates were calculated either from the observed concentration distributions in both component films or from that in one component film by employing the methods described previously¹⁾. Both agreed well with each other.
With known D_ov together with D through the partner component film, a method of calculation of diffusion coefficient D through a component film in a given repeated laminate was presented.
In repeated laminates composed of nylon 6 with polypropyrene (Pp) or cellophane (Ce), values of D for PAAB through Pp and Ce were estimated using the method.