8/27/2023 0 Comments Constant viscosity test![]() ![]() Rheometry allows to measure the viscosity for a range of shear rates, which results in multiple DP v evaluations per sample, and thus in statistically representative data from an individual test. The proposed methodology relies on the application of a shear flow in a thin film of cellulose solution to measure its dynamic viscosity, from which DP v can be subsequently derived in a straightforward fashion. The current study proposes an efficient, alternative method to evaluate DP v of cellulosic paper, which is based on rotational rheometry. ![]() DP v can be deduced from the viscosity of dilute paper solutions, as typically measured through glass capillary viscometry. In paper degradation studies, the viscosity-average degree of polymerisation (DP v) is often used as a key indicator of the extent of degradation of cellulosic paper. ![]()
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