β Scribed by A. I. Burshtein; B. I. Yakobson
No coin nor oath required. For personal study only.
The treatment used for diffusionβcontrolled reactions is extended to the case when the final jumplike step of the reagent approach differs essentially from the preceding diffusion. In terms of the model proposed it is possible to take into account, in a simple way, chemical inhomogeneity of the reagents when the inβcage reaction rate depends on the pair state (for example, on the molecular orientation). In this connection the reaction can be controlled either by the reagent intrusion into the solvation shell of the partner, or by the inβcage relaxation.
π SIMILAR VOLUMES
The Taylor dispersion technique has been used to measure the diffusion coefficients of nine compounds in dilute solution in isopropanol at 300 K. These compounds correspond, by the difference of a single hydrogen atom, to nine free radicals, for which the rate constants for bimolecular (termination)
Reaction kinetics with diffusion control mechanisms are investigated to model the later-stage cure progressing in a co-cured epoxy network that was formed by blending and heating bisphenol-A polycarbonate (PC) with tetraglycidyl-4,4 -diaminodiphenylmethane (TGDDM), which together were cured with an