Physical stopping peeling reaction

Though the major alkaline reactions of cellulose have been relatively well defined, the role of cellulose physical structure in those reactions has not been clearly established. Cellulose molecules have been reported to undergo physical stopping of the peeling reaction when a molecule is peeled back to a crystalline region in the cellulose structure, with the result that the reducing endgroup... 

Although physical stopping is not a chemical reaction, per se, kpg values determined using Equation 4 may be compared to values, providing a measure of the relative importance of the two modes of stopping. Furthermore, comparison of kpg values for two substrates gives an indication of the relative extent of structural hindrance to peeling. 

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