caa a22 4500 378886371 CHVBK 20180305123443.0 cr unu---uuuuu 161128e200406 xx s 000 0 eng 10.1515/REST.2004.129 doi (NATIONALLICENCE)gruyter-10.1515/REST.2004.129 Basta Altaf H. Cellulose & Paper Dept., National Research Centre, Dokki-12622, Cairo, Egypt. E-mail: Altaf_Basta@Yahoo.Com Performance of Improved Polyvinyl alcohol as an Ageing Resistance Agent [Elektronische Daten] [Altaf H. Basta] Le comportement de l'alcool polyvinylique en tant qu'agent stabilisateur contre le vieillissement Das Verhalten von Polyvinylalkohol als Stabilisierungsmittel gegen die Alterung Investigations have continued for improving the ageing resistance of local (Egyptian) alum-rosin sized paper sheets. In this work we intended to investigate the durability of polyvinyl alcohol (PVA) as a treatment polymer on locally produced paper and as a resizing agent to strengthen decayed papers. In this respect, the treatment of such paper samples with a PVA-borax system was carried out before and after accelerated ageing for 6 days. The concentration of PVA was also optimized. The strength and optical properties, as well as thermogravimetric and IR-spectra analyses showed the success of using a PVA-borax system for the intended purpose in comparison with using individual PVA alone. Optimum improvement was achieved using 0.5-0.75 % PVA and 2% borax. © 2004 K. G. Saur Verlag GmbH, Ortlerstr. 8, D-81373 München Restaurator Walter de Gruyter GmbH & Co. KG 25/2(2004-06), 129-140 0034-5806 25:2<129 2004 25 REST https://doi.org/10.1515/REST.2004.129 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/REST.2004.129 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Basta Altaf H. Cellulose & Paper Dept., National Research Centre, Dokki-12622, Cairo, Egypt. E-mail: Altaf_Basta@Yahoo.Com NATIONALLICENCE 773 0- Restaurator Walter de Gruyter GmbH & Co. KG 25/2(2004-06), 129-140 0034-5806 25:2<129 2004 25 REST CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter