Abstract
Polyester fabric has compact molecular chain structure, high crystallinity, no hydrophilic groups except hydroxyl groups at both ends, and poor hygroscopicity. The surface of polyester fabric was modified with acrylic acid by ultraviolet light in order to improve its hydrophilicity. The best technological conditions are as follows: the concentration of acrylic acid is 10%, the irradiation time is 1 hour, and the concentration of photoinitiator is 5%. Under the optimum conditions, acrylic acid is successfully grafted onto the surface of polyester fabric. There are grafting polymer between the fiber gaps or on the surface of fiber, accompanied by cross-linking or bonding. The hydrophilicity and dyeing rate of modified polyester fabric are improved obviously. The breaking strength and elongation at break of treated polyester fabric increases and decreases, respectively.
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