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Shape memory polymer (SMP) falls within the class of intelligent materials, possessing the distinctive ability to return to their original shape. Owing to their diverse applications, SMPs have garnered significant importance in recent decades, playing a pivotal role in both fundamental and applied research. It emerged as a practical and efficient substitute for traditional metallic shape memory composites. In the present research, we have prepared three distinct samples, namely E-DETA, E-TETA, and E-TETA-SiC. Sample E-DETA consists of epoxy Bisphenol A diglycidyl ether (BADGE) and Diethylenetriamine (DETA) hardener, Sample E-TETA comprises epoxy “BADGE” and Triethylene Tetramine (TETA) hardener, while Sample E-TETA-SiC is a combination of epoxy “BADGE” with Triethylene Tetramine (TETA) hardener and SiC microparticles. In order to explore the viscoelastic properties, dynamic mechanical analysis (DMA) was performed according to ASTM D-4065 standard using dynamic mechanical spectrometer. DMA serves as a technique for quantifying both the modulus (stiffness) and damping (energy dissipation) characteristics of materials subjected to deformation under periodic stress at single or multiple frequencies. In contrast to the other samples, E-DETA displays the highest loss modulus, suggesting its comparatively viscous nature and efficient dissipation of a significant amount of energy during deformation. E-TETA follows with a slightly lower loss modulus, while the minimum loss modulus is observed in E-TETA-SiC. Regarding storage modulus, E-TETA exhibits a notably elevated value compared to the other two, indicating its relative rigidity and capacity to store a substantial amount of elastic energy. E-TETA-SiC has a lower storage modulus than E-TETA, while the minimum value observed in E-DETA. Additionally, E-TETA has the highest glass transition temperature (Tg), indicating its greater resistance to flexibility or rubbery behavior at elevated temperatures. Notably, the glass transition temperatures (Tg) of E-TETA-SiC and E-DETA are nearly equal.

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Comparing Dynamic Mechanical Behavior in Three Epoxy-Based Shape Memory Polymers to Explore Viscoelastic Properties

  • 会议论文

  • 发表日期：

    2025年

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  • Ubaid Ahmad Khan,
  • Neetika Kesarwani,
  • Sushil Kumar Singh,
  • Anshuman Srivastava

摘要

Shape memory polymer (SMP) falls within the class of intelligent materials, possessing the distinctive ability to return to their original shape. Owing to their diverse applications, SMPs have garnered significant importance in recent decades, playing a pivotal role in both fundamental and applied research. It emerged as a practical and efficient substitute for traditional metallic shape memory composites. In the present research, we have prepared three distinct samples, namely E-DETA, E-TETA, and E-TETA-SiC. Sample E-DETA consists of epoxy Bisphenol A diglycidyl ether (BADGE) and Diethylenetriamine (DETA) hardener, Sample E-TETA comprises epoxy “BADGE” and Triethylene Tetramine (TETA) hardener, while Sample E-TETA-SiC is a combination of epoxy “BADGE” with Triethylene Tetramine (TETA) hardener and SiC microparticles. In order to explore the viscoelastic properties, dynamic mechanical analysis (DMA) was performed according to ASTM D-4065 standard using dynamic mechanical spectrometer. DMA serves as a technique for quantifying both the modulus (stiffness) and damping (energy dissipation) characteristics of materials subjected to deformation under periodic stress at single or multiple frequencies. In contrast to the other samples, E-DETA displays the highest loss modulus, suggesting its comparatively viscous nature and efficient dissipation of a significant amount of energy during deformation. E-TETA follows with a slightly lower loss modulus, while the minimum loss modulus is observed in E-TETA-SiC. Regarding storage modulus, E-TETA exhibits a notably elevated value compared to the other two, indicating its relative rigidity and capacity to store a substantial amount of elastic energy. E-TETA-SiC has a lower storage modulus than E-TETA, while the minimum value observed in E-DETA. Additionally, E-TETA has the highest glass transition temperature (Tg), indicating its greater resistance to flexibility or rubbery behavior at elevated temperatures. Notably, the glass transition temperatures (Tg) of E-TETA-SiC and E-DETA are nearly equal.