Vol. 1, No 1, 1994 pp. 82 - 90
UDC
543.422.5:547.235.2
THE DIFFERENCE IN COLOUR OF POLYESTER FIBRES CAUSED BY VARIOUS pH VALUES OF DISPERSE DYE-LIQUOR p-PHENYLAZOANILINE – PHENOL
M. Novaković1 , T. Pecev2 , M. Miljković2 , V. Ignjatović1
1Faculty of Technology, Durmitorska 19,16000 Leskovac, Yugoslavia
2Department of Chemistry, Faculty of Science, Ćirila i Metodija 2,18000 Niš, Yugoslavia
Abstract. The pH value of disperse dye-liquor is one of the factors which affect the reactions in the dye (p-phenylazoaniline-phenol) - substrate (polyester fibres) system as well as the dye exhaustion and fixation. Provided that all other conditions are maintained constant and only the pH value is changed, the colour of polyester fibres will be affected. This effect is manifested through the total difference in colour DE, i.e. in the part of colour hue DH differences, in the part of colour purity DC differences, and in the part of colour lightness DL differences. The colour measurement of the dyed samples is done by reflection spectrophotometry Update Colour Eye 3000 by ICS - TEXICON (England), programme Super MATCH 6.
RAZLIKA U OBOJENJU POLIESTARSKIH VLAKANA IZAZVANA RAZLIČITIM pH VREDNOSTIMA RASTVORA DISPERZNE BOJE p-FENILAZOANILIN – FENOL
pH vrednost rastvora disperzne boje je jedan od faktora koji se odražava na reakcije koje se odigravaju u sistemu boja (p-fenilazoanilin-fenol) - supstrat (poliestarska vlakna), kao i na iscrpljenje i vezivanje boje. Ako se svi ostali uslovi bojenja održavaju konstantnim, a menja se samo pH vrednost rastvora boje to će se odraziti na obojenje poliestarskih vlakana. Ovaj efekat se manifestuje kroz ukupnu razliku u boji DE, tj. u razlikama u delu tona boje DH, u delu čistoće boje DC i u delu svetline boje DL. Metrika obojenih uzoraka vršena je na refleksionom spektrofotometru Update Colour Eye 3000 firme ICS - TEXICON (England), koji radi po programu Super MATCH 6.
