A kinetic theory which assumes that the activation energy for molecular attachment is the dominant factor controlling the time constant for nucleation, that the rate controlling step is the addition of individual tetrahedra, that the activation energy is proportional to the number of T-cation--oxygen bonds broken during the attachment of tetrahedral groups, and that the average number of T-cation--oxygen bonds broken increases as the melt and crystal structures become more polymerized.--Modified journal abstract.

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