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Hydroxypropylmethyl cellulose (HPMC) samples with varying degrees of substitution of methoxy groups (DS), mass molar substitutions of hydroxypropoxy groups (MS) and molecular weights were crosslinked with citric acid to create water insoluble films with mean thickness from (48 ± 3) µm to (127 ± 8) µm. The samples presented DS ranging from 1.5 to 2.1, MS ranging from 0.25 to 0.9 and average molecular...
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