Authors:
Elisabetta Princi Dipartimento di Chimica e Chimica Industriale, Universitá di Genova Via Dodecaneso 31, 16146 Genova, Italy

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Silvia Vicini Dipartimento di Chimica e Chimica Industriale, Universitá di Genova Via Dodecaneso 31, 16146 Genova, Italy

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E. Pedemonte Dipartimento di Chimica e Chimica Industriale, Universitá di Genova Via Dodecaneso 31, 16146 Genova, Italy

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Valeria Arrighi Chemistry, School of Engineering and Physical Science, Heriot-Watt University Edinburgh, EH 14 4-AS, UK

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I. McEwen Chemistry, School of Engineering and Physical Science, Heriot-Watt University Edinburgh, EH 14 4-AS, UK

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Summary Natural polymers, as cellulose, with hydrophilic groups such as hydroxyl groups have various strengths of interaction with water. Cellulose is a structurally heterogeneous polymer, consisting of paracrystalline and amorphous domains. Water can interact with the amorphous domains, but it is excluded almost completely from the crystalline regions. The purpose of this study was to estimate the amount of bulk free water in cellulose based materials, as linen, cotton and paper, by measuring the heats of vaporisation. Moreover the amount of free water in oxidised and grafted samples has been determined by DSC and this quantity has been compared with that found in the corresponding native materials. In oxidised cellulose the water content increases with decreasing the degree of crystallinity; the oxidation, being a degradative reaction, modifies the amorphous content in the cellulose. In presence of acrylic grafted polymer, the free water content is reduced and this reduction is related to the grafting yields.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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