RESIN FINISH TO CELLULOSIC FABRICS

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dc.contributor.authorYABANI, ADAMU MOHAMMED
dc.date.accessioned2014-02-07T11:29:09Z
dc.date.available2014-02-07T11:29:09Z
dc.date.issued1973-05
dc.descriptionThesis P r e s e n t e d to The Ahmadu B e l l o U n i v e r s i ty for the degree of MASTER OF SCIENCEen_US
dc.description.abstractThe present study deals with the reactions of formaldehyde, dimethylol urea and two commercial resins, aimethylolethylene urea (ARK NG) and a bis-carboamate derivative (ARK CA) with standard cellulose and various oxycelluloses under varying conditions and the effect of these reactions on the crease recovery and tensile strengths of these celluloses. It has been found t h a t : - (a) The % add-on of formaldehyde and the other resins to standard and. nitrogen dioxide oxycellulose depend very much on the catalyst used. The efficiency of the c a t a l y s t s decrease in the order HCl>MgCl2.6H2O> Zn(N03)2.6H20 which is related to the acidity of their solutions. It has also been found that divalent metal s a l t s which are generally used as catalysts release hydrogen ions by the binding of the metal ion to the carboxyl groups in cellulose. T he loss in t e n s i le strength is maximum for hydrochloric acid catalyst probably due to hydrolytic degradation. (b) Oxidation of the cellulose structure with nitrogen dioxide leads to decreases in % add-on of formaldehyde and various other resins. Losses are also observed in crease recovery angle values and t e n s i l e strengths. However, addition of sodium chloride even of as small a concentration as 0.001M to the reaction bath increases the add-on of formaldehyde to both standard and oxycellulose, (c) Oxidation of the cellulose structure with sodium metaperiodate r e s u l t s in an increase in CRA value even without resin treatment. Higher increase in CRA value is observed when such an oxycellulose was cured at 1500 C than when it was "boiled in water. It is thought that cross-1inking occurs through hemiacetal bond formation. Loss in tensile strength is r e l a t i v e l y lower than for nitrogen dioxide oxycellulose. d) Cross-linking periodate oxycellulose with various resins leads to further increases in CRA values. (e) Borohydride reduction of periodate oxycellulose produces an increase in resin add-on as would be expected from the increase in available hydroxyl groups. However, decreases in CRA values and tensile strengths were observed.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/701
dc.language.isoenen_US
dc.subjectRESINen_US
dc.subjectFINISHen_US
dc.subjectCELLULOSICen_US
dc.subjectFABRICSen_US
dc.titleRESIN FINISH TO CELLULOSIC FABRICSen_US
dc.typeThesisen_US
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