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N,N,N‐trimethyl chitosan (TMC) with molar mass 29 ~ 136 kg/mol and degree of quaternization 70% ~ 82% was synthesized from chitosan via N,N‐dimethyl chitosan (DMC) by a two‐step method. Size exclusion chromatography (SEC) coupled with multiangle laser light scattering was employed to characterize the molar mass and chain conformation of DMC and TMC. Nearly no degradation was found for DMC, but degradation...
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