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Study of the synthesis and properties of polyurethane containing pyridyl units for shape memory

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Abstract

In this study, 4,4′-diphenylmethane diisocyanate and polytetramethylene glycol were used to prepare a prepolymer, and 2,6-pyridinedimethanol (2,6-PDM) was then used as a chain extender to prepare a novel polyurethane (PDM/PUs). Gel permeation chromatography analysis shows that the molecular weight of PDM/PUs increases as the 2,6-PDM content increases. Fourier transform infrared spectroscopy analyses demonstrate that by increasing the 2,6-PDM content, PDM/PUs will form strong hydrogen bonds. The thermal analysis of PDM/PUs indicates that the initial decomposition temperature of PDM/PUs-03 is approximately 10 °C higher than that of PDM/PUs-01. Differential Scanning Calorimetry and Dynamic Mechanical Analysis analyses indicate that increases in the 2,6-PDM content produce significant enhancements in the glass transition temperature (T g) and the dynamic T g of PDM/PUs. Stress–strain tests indicate that 2,6-PDM can increase the maximum stress and Young’s modulus of PDM/PUs while reducing the elongation rate at break. The results of moisture absorption rate test indicate that when the 2,6-PDM content and ambient humidity increase, the water absorption rate of PDM/PUs increases. Moreover, PDM/PUs exhibits good shape recovery (>90 %).

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Authors and Affiliations

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

    Shih-Hsuan Chiu, Cheng-Lung Wu, Chih-Yuan Tsou & Chi-Hui Tsou

  2. Department of Materials Science and Engineering, Vanung University, Jongli, 32061, Taoyuan, Taiwan, ROC

    Hsun-Tsing Lee

  3. Department of Creative Fashion Design, Taoyuan Innovation Institute of Technology, No. 414, Sec. 3, Jhongshan E. Rd., Jongli, 32091, Taoyuan, Taiwan, ROC

    Maw-Cherng Suen

Authors
  1. Shih-Hsuan Chiu
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  2. Cheng-Lung Wu
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  3. Chih-Yuan Tsou
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  4. Hsun-Tsing Lee
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  5. Chi-Hui Tsou
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  6. Maw-Cherng Suen
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Correspondence to Maw-Cherng Suen.

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Chiu, SH., Wu, CL., Tsou, CY. et al. Study of the synthesis and properties of polyurethane containing pyridyl units for shape memory. Polym. Bull. 73, 1303–1320 (2016). https://doi.org/10.1007/s00289-015-1548-4

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  • DOI: https://doi.org/10.1007/s00289-015-1548-4

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