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Curing kinetics and shape-memory behavior of an intrinsically toughened epoxy resin system

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Abstract

A diglycidylether of propoxylated bisphenol-A with two oxypropylene units (DGEBAPO-2) was prepared, and the structure was characterized by FTIR, 1H NMR, and ESI–MS, and a flexible curing agent 2-methyl-1,5-pentanediamine (MPDA) was used to obtain an intrinsically toughened network for potential shape-memory application. The curing kinetics of DGEBAPO-2/MPDA was systematically investigated by using both non-isothermal and isothermal DSC methods; in addition, the dynamic mechanical property, mechanical property, and shape-memory property were investigated by DMA, tensile experiment, and quantitative shape-memory evaluation method. The results showed that Šesták-Berggren model and Kamal model were able to well describe the non-isothermal curing reaction rate and isothermal curing reaction rate, respectively. Tensile test at 49 °C indicated that the cured DGEBAPO-2/MPDA combined a relatively large elongation at break of 95.53 ± 2.27 % with a relatively large tensile stress of 6.33 ± 0.11 MPa. Quantitative shape-memory evaluation revealed good shape-memory properties of cured DGEBAPO-2/MPDA with shape fixity of 98.88 ± 0.04 % and shape recovery of 96.67 ± 6.91 %.

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Acknowledgements

This work was supported by the National High Technology Research and Development Program of China (Grant No. 2012AA03A205).

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Authors and Affiliations

  1. Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing, 100029, People’s Republic of China

    Mengjin Fan, Xiangyuan Li, Junying Zhang & Jue Cheng

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  1. Mengjin Fan
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  2. Xiangyuan Li
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  3. Junying Zhang
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  4. Jue Cheng
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Correspondence to Junying Zhang or Jue Cheng.

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Fan, M., Li, X., Zhang, J. et al. Curing kinetics and shape-memory behavior of an intrinsically toughened epoxy resin system. J Therm Anal Calorim 119, 537–546 (2015). https://doi.org/10.1007/s10973-014-4106-7

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  • DOI: https://doi.org/10.1007/s10973-014-4106-7

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