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Investigation of stain-resistant cationic dyeable nylon 6 modified with sodium salt of 5-sulfoisophthalic acid and polyethylene glycol

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Abstract

Nylon 6 can be dyed with acid dyes and therefore it can also be stained by natural or artificial acid dyes existing in some foods and drinks when they are spilled on nylon fabrics. In this study, cationic dyeable polyamide (CD-PA6) was synthesized with sodium salt from 5-sulfoisophthalic acid (5-SSIPA) and easily cationic dyeable polyamide (ECD-PA6) was prepared with 5-SSIAP and polyethylene glycol (PEG). The influence of the chemical modification to CD-PA6 and ECD-PA6 on the resultant structures were characterized by wide angle X-ray diffraction (WAXD) and Fourier transform infrared spectroscopy (FT-IR), and their thermal properties were tested by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). The effects of varying 5-SSIPA content on the cationic dye uptake and acid dye resistance rate were also investigated, as well as mechanical properties of the modified PA6. Incorporating PEG not only destroyed the regularity of molecular chain arrangement and created more amorphous regions in the ECD-PA6 samples, but also changed the nylon 6 from α-form to γ-form. Results revealed a considerable improvement in cationic dye uptake and acid dye resistance rate in the modified fibers compared with unmodified fibers.

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Authors and Affiliations

  1. Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, Tianjin, 300387, China

    Li-Kun Xiong, Yi-Fan Fu & Cui-Yu Yin

  2. School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China

    Li-Kun Xiong, Yi-Fan Fu & Cui-Yu Yin

  3. Yiwu Huading Nylon Co., Ltd., Yiwu, 322000, China

    Shou-Yun Zhang

Authors
  1. Li-Kun Xiong
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  2. Yi-Fan Fu
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  3. Shou-Yun Zhang
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  4. Cui-Yu Yin
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Correspondence to Cui-Yu Yin.

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Xiong, LK., Fu, YF., Zhang, SY. et al. Investigation of stain-resistant cationic dyeable nylon 6 modified with sodium salt of 5-sulfoisophthalic acid and polyethylene glycol. Fibers Polym 17, 984–991 (2016). https://doi.org/10.1007/s12221-016-5748-9

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  • DOI: https://doi.org/10.1007/s12221-016-5748-9

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