INVESTIGATION OF PHYSICOCHEMICAL PROPERTIES OF STYRENE-ACRYLIC AND URETHANE POLYMERS USED IN FINISHING OF TEXTILE MATERIALS
Abstract
The results of the study of the physicochemical properties of styrene-acrylic and urethane polymer films, as well as polymer compositions based on the studied polymers with the addition of crosslinking agents are presented. Aqueous dispersions of styrene-acrylic polymers Lacritex 309, Lacritex 430, Lacritex 640 and polyurethane polymer Aquapol 14 were used for the formation of films. Triglycidyl esthers of polyoxypropylene triol and trimethylolpropane — Laproxid 703 and Laproxid TMP — were used as crosslinking agents. The stability of polymer films to hydrolytic destruction was evaluated after treatment at 20, 40 and 100 °C, and to the soap-soda treatment — at 40 °C. It was found that the most resistant to hydrolysis and soap-soda treatment are films from styrene-acrylic polymer Lacritex 309 and compositions Lacritex 640 / Laproxid 703, Aquapol 14 / Laproxid TMP, Aquapol 14 / Laproxid 703. The tensile load, elongation at break, stiffness and surface tackiness were also determined for the studied polymer films. It was found that polymer films based on Lacritex 309 and compositions Lacritex 640 / Laproxid 703, Aquapol 14 / Laproxid 703 are characterized by the greatest strength and elongation, non-rigid and non-tacky surface. Adding Laproxid TMP to polyurethane Aquapol 14 provides creation of a solid and inelastic film. To assess the effect of polymer coatings on the textile material rigidity, a cotton fabric with twill weave was used, which is used for special work clothes. Polymers and their compositions were applied to the fabric from a solution with a concentration of 150 g/l, followed by drying and heat setting. For dressed cotton fabric, rigidity and breaking load were determined. The rigidity of the treated cotton fabric was determined by the method of console. It has been established that the use of polyurethane Aquapol 14 and compositions based on it, as well as styrene-acrylic dispersions Lacritex 309 and Lacritex 430 will result in hard handle of textile materials. The composition based on Lacritex 640 with the addition of Laproxid 703 as a crosslinker provides an elastic and strong textile material.
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