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Improving the UV resistance of aromatic poly(l,3,4‐oxadiazole) fiber using a disperse dye modified with octavinyl POSS . Part 1: Preparation of dye and dyeing
Author(s) -
Mao Yahong,
Song Qingshuang,
Guan Yu
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.44745
Subject(s) - dyeing , disperse dye , materials science , fourier transform infrared spectroscopy , acid dye , fiber , chemical engineering , polymer chemistry , molecule , nuclear chemistry , organic chemistry , composite material , chemistry , engineering
Modified dyes were obtained by grafting of disperse dyes with octavinyl polyhedral oligomeric silsesquioxanes (POSS) using a Friedel‐Crafts alkylation reaction and using different ratios of POSS and the original disperse dye. The modified dyes are used to dye aromatic poly(l,3,4‐oxadiazole) ( p ‐POD) fiber to improve its UV resistance. Then the structure of the modified dye is characterized by Fourier transform infrared spectroscopy and NMR, and the effects of the structure of the modified dye and the dyeing conditions on the UV resistance and color strength ( K/S value) of the dyed samples are investigated. The results indicated that the UV adsorption peaks of the modified dye solutions are located at the specified UV wavelengths. The UV resistance of the p ‐POD fiber dyed with the modified dye (1:3) can be effectively improved, and the dyed p ‐POD fiber can obtain a higher K/S value simultaneously. During the dyeing process, increasing the dyeing temperature and prolonging the dyeing time are both beneficial in improving the anti‐UV ability of the dyed p ‐POD fiber; these changes can effectively promote the fixation of dye molecules into p ‐POD fibers due to stimulating the motion of dye molecules and p ‐POD macromolecules. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44745.