On the applicability of Arrhenius equation to accelerated ageing tests. The case of alum-impregnated cellulose

• Autorzy: Barański, A. , Dziembaj, R. , Konieczna-Molenda, A. , Łagan, J.M. , Walas, S.
• Języki publikacji: EN

Abstrakty

EN

The kinetics of degradation of artificially aged, aluminum-sulphate-impregnated paper samples has been measured viscometrically. The full applicability of Ekenstam equation, characteristic of acid hydrolysis of cellulose, proved to be restricted to the region of the low degradation temperatures and/or low Al-contents only. The importance of other degradation processes was growing at higher temperatures and/or Al-contents, thus leading to inadequacy of a simple Arrhenius plot used for the extrapolation of the predicted degradation time to the conditions commonly applied in libraries and archives. Application of mixed-control type of kinetic equation, taking into account the other processes (e.g. oxidation), seems to be inevitable. This would result in taking into consideration at least two Arrhenius-type plots for at least two different rate constants.

Słowa kluczowe

PL

degradacja celulozy; równanie kinetyczne; impregnacja papieru; ałun

EN

cellulose degradation; kinetic equation; Arrhenius plots; paper impregnation; alum

• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2004
• Tom: Vol. 6, nr 1
• Strony: 1--8
• Opis fizyczny: Bibliogr. 37 poz., tab., rys.

Twórcy

autor

Barański, A.

• Regional Laboratory for Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30-060 Cracow,

autor

Dziembaj, R.

• Faculty of Chemistry, Jagiellonian university, Cracow, Poland

autor

Konieczna-Molenda, A.

• Faculty of Chemistry, Jagiellonian university, Cracow, Poland

autor

Łagan, J.M.

• Regional Laboratory for Physicochemical Analyses and Structural Research, Jagiellonian University, Ingardena 3, 30-060 Cracow

autor

Walas, S.

• Faculty of Chemistry, Jagiellonian university, Cracow, Poland

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