, Volume 19, Issue 2, pp 313–318 | Cite as

The role of the Ekenstam equation on the kinetics of cellulose hydrolytic degradation



The meaning of the Ekenstam equation (1/DP − 1/DP°) = kt is shortly discussed. Several misleading statements about its application to cellulose hydrolysis are underlined in order to improve the reliability of kinetic analyses. To this end, some further simple analyses are suggested to the experimentalists.


Degree of polymerisation Size exclusion chromatography Paper degradation 

List of symbols


Degree of polymerisation


Rate constant of hydrolysis (mol g−1 t−1) for the Ekenstam equation; (t−1) for first-order kinetics


Initial rate constant (Emsley and Stevens model)


Rate constant of decrease of k1,0


Levelling-off degree of polymerisation


Zero-order momentum of a Mw distribution


First-order momentum of a Mw distribution


Molecular weight

Initial amount of scissile units


Number of broken bonds (scissions)


nth derivative of the function S(t) at t = 0


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Istituto per la Tutela delle Opere Grafiche (ITOG)Zero BrancoItaly

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