Journal
APPLIED SURFACE SCIENCE
Volume 253, Issue 12, Pages 5521-5528Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2006.12.086
Keywords
graft copolymerization; polyamide 6.6 fibers; Fourier transform infrared spectroscopy; thermal analysis; scanning electron microscopy; moisture regain; elongation at break; contact angle measurements
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The grafting of acrylic acid (AA) monomer (CH2=CH-COOH) on polyamide 6.6 monofilaments (PA 6.6) using benzoyl peroxide (BPO) as initiator was carried out in order to enhance the hydrophilic nature of fibers. The grafting rate depends on the AA concentration, the BPO concentration, the time and the temperature of reaction. The best conditions for optimum rate of grafting were obtained with a AA concentration of 0.5 M, a BPO concentration of 0.03 M, a reaction temperature of T = 85 degrees C and a reaction time of 120 mn. The fiber surface has been investigated by many experimental techniques of characterization such as Fourier transform infrared spectroscopy (FTIR), calorimetric analysis (DSC), scanning electron microscopy (SEM), and contact angle measurements. The effect of grafting of acrylic acid onto PA 6.6 fibers on their moisture and mechanical resistances was analyzed from water sorption and elongation at break measurements. The analysis of the experimental data shows clearly the efficiency of the grafting reaction used, leading to a significant increase of the hydrophilic character of the PA 6.6 surface. (C) 2007 Elsevier BN. All rights reserved.
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