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The effects of silver nitrate on the structure and properties of polyurethanes containing pyridyl units

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Abstract

In this study, 2,6-pyridinedimethanol was used as a chain extender to synthesize a new polyurethane, PDM-PU. Further, various amounts of silver nitrate were incorporated to produce PDM-PU/AgNO3 complexes. FT-IR and UV–Vis analyses confirm the formation of complex in the PDM-PU/AgNO3. DSC and DMA results show that the glass transition temperature (T g), dynamic T g and storage modulus at 25 °C of the PDM-PU/AgNO3 complexes increase with increasing AgNO3 content. This is due to the formation of complex structure that can restrict the segmental motion of polymer chains. The TGA and stress–strain test results show that the thermal decomposition temperature, tensile strength and elongation at break increase with the AgNO3 content initially. Then, they decrease inversely. This indicates that the formation of complex structure raises these properties when the AgNO3 content is below certain value. But as more coordinate bonds were formed, the specimens become brittle. In addition, the crosslink effect caused by coordinate bonds inhibits the dissolution of polymer chains and thereby reduces the swelling degree of the complexes in solvent. Furthermore, AgNO3 imparts antibacterial activity against S. aureus and K. pneumoniae to the complexes

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Vanung University, Jhongli, Taoyuan, 32061, Taiwan, ROC

    Hsun-Tsing Lee

  2. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC

    Chi-Hui Tsou

  3. Department of Chemical Engineering, R&D Center for Membrane Technology, Chung Yuan University, Jhongli, 32023, Taiwan

    Chi-Hui Tsou

  4. Department of Materials and Textiles, Oriental Institute of Technology, New Taipei City, 32091, Taiwan, ROC

    Chi-Hsiung Jou

  5. Department of Civil and Environmental Engineering, Taoyuan Innovation Institute of Technology, Jhongli, 32091, Taiwan

    Fu-Chang Huang

  6. Graduate School of Materials Applied Technology, Taoyuan Innovation Institute of Technology, Jhongli, Taoyuan, 32091, Taiwan, ROC

    Meng-Ling Wang

  7. Department of Creative Fashion Design, Taoyuan Innovation Institute of Technology, Jhongli, Taoyuan, 32091, Taiwan, ROC

    Maw-Cherng Suen

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  1. Hsun-Tsing Lee
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  2. Chi-Hui Tsou
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Correspondence to Maw-Cherng Suen.

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Lee, HT., Tsou, CH., Jou, CH. et al. The effects of silver nitrate on the structure and properties of polyurethanes containing pyridyl units. Polym. Bull. 71, 2749–2767 (2014). https://doi.org/10.1007/s00289-014-1222-2

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  • DOI: https://doi.org/10.1007/s00289-014-1222-2

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