The effects of ionizing radiation on the cellulose of woodfree paper

Bouchard, Jean; Méthot, Myriam; Jordan, Byron D.

doi:10.1007/s10570-005-9033-0

Cited by 90 publications

(71 citation statements)

References 11 publications

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“…DPo and DP are based on the weight-average molar mass obtained as an absolute value from SEC-MALLS (Hon 1985;Johansson et al 2000;Bouchard et al 2006;Calvini and Gorassini 2006).…”

Section: Sample Preparation For Gel Permeation Chromatography (Gpc) Amentioning

confidence: 99%

Critical evaluation of approaches toward mass deacidification of paper by dispersed particles

Potthast

Ahn

2016

Cellulose

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Mass deacidification has been an important topic in cellulose science and will continue to be a critical issue as long as acidic books and paper-based materials are-a often major-part of library and archive stocks. Different means are available to judge the result of a deacidification treatment and to address its sustainability and efficacy. The present study compares deacidification by dispersed particles with procedures that apply homogeneously dissolved alkaline compounds, both under humid and dry accelerated aging conditions. Analysis by size-exclusion chromatography coupled to light scattering detection is used in combination with accelerated aging. The number of chain scissions, i.e. cellulose degradation, is the parameter used for evaluation, expressed as stabilization factors relative to the non-treated specimen. Upon deacidification with homogeneous solutions stability factors of about four were reached, while deacidification with dispersed particles gave only two times longer life times (stability factor of two). Mechanistic aspects are discussed in terms of alkaline reserve, cellulose degradation and mobilities of deacidification agents.

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“…DPo and DP are based on the weight-average molar mass obtained as an absolute value from SEC-MALLS (Hon 1985;Johansson et al 2000;Bouchard et al 2006;Calvini and Gorassini 2006).…”

Section: Sample Preparation For Gel Permeation Chromatography (Gpc) Amentioning

confidence: 99%

Critical evaluation of approaches toward mass deacidification of paper by dispersed particles

Potthast

Ahn

2016

Cellulose

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“…The CSN, which represents the average number of chain scissions per cellulose chain unit during the time course of degradation, can be calculated using the following equation (Hon 1985;Moser and Dahinden 1987;Johansson et al 2000;Bouchard et al 2006;Calvini and Gorassini 2006) …”

Section: Characterization Of Cellulose Degradationmentioning

confidence: 99%

On the degradation evolution equations of cellulose

2007

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Cellulose degradation is usually characterized in terms of either the chain scission number or the scission fraction of cellulose unit as a function of degree of polymerisation (DP) and cellulose degradation evolution equation is most commonly described by the well known Ekenstam equations. In this paper we show that cellulose degradation can be best characterized either in terms of the percentage DP loss or in terms of the percentage tensile strength (TS) loss. We present a new cellulose degradation evolution equation expressed in terms of the percentage DP loss and apply it for having a quantitative comparison with six sets of experimental data. We develop a new kinetic equation for the percentage TS loss of cellulose and test it with four sets of experimental data. It turns out that the proposed cellulose degradation evolution equations are able to explain the real experimental data of different cellulose materials carried out under a variety of experimental conditions, particularly the prolonged autocatalytic degradation in sealed vessels. We also develop a new method for predicting the degree of degradation of cellulose at ambient conditions by combining the master equation representing the kinetics of either percentage DP loss or percentage TS loss at the lowest experimental temperature with Arrhenius shift factor function.

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“…The excellent properties of tricarbanilates for the structural analysis of cellulose and starch were first published by Burchard and Husemann [5]. This method is often used on cellulose GPC [6][7][8][9][10][11][12][13][14][15][16][17]. The mentioned papers describe different modifications of the heterogeneous derivatisation.…”

Section: Introductionmentioning

confidence: 99%