Abstract
Cellulose acetate butyrate, cellulose acetate stearate, and cellulose acetate phthalate have been studied as monolayers at the air‐water interface.Monolayers of the first two were virtually unaffected by changes in subphase pH, whereas the last one, cellulose acetate phthalate, exhibited large differences under the same conditions.Certain monolayer properties of the cellulose esters have been used to interpret the behavior of these polymers as free films and enteric coatings.
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