Structural, thermal, and viscoelastic response of nanoclay reinforced polylactic acid/thermoplastic polyurethane shape‐memory nanocomposites of low transition temperature

Horastani, Sahar Jafari; Karevan, Mehdi; Ghane, Mohammad

doi:10.1002/pat.5727

Cited by 6 publications

(1 citation statement)

References 43 publications

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“…The driving method of thermal-responsive SMP is simple and convenient, [12][13][14][15] so thermal-responsive SMPs hold immense potential for diverse applications in aerospace, 16 biomedicine, 17 soft robotics, 18 and smart textiles. 19 Fan and Li 20 increased the recovery stress of SMP in the rubber state to 17 MPa, which is very beneficial for applying SMP in engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental and molecular dynamics study on thermal‐mechanical properties of epoxy shape memory polymers

Yang,

Liu,

et al. 2024

Journal of Polymer Science

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Experimental and molecular dynamics simulations were employed to investigate epoxy shape memory polymers' thermal‐mechanical properties and shape memory characteristics, utilizing polyether amine and modified hexanediamine as curing agents following the material prerequisites for variable stiffness fixtures. Glass transition temperature and Young's modulus of epoxy shape memory polymers are characterized by dynamic mechanical analysis. The consistency of the glass transition temperature between the simulation model and the experimental findings verified the accuracy of the molecular dynamics simulation. The uniaxial tensile simulation revealed that non‐bond energy predominantly exerts its influence in stretch. After reaching the yield stress, the weight fraction of the curing agent affects the generation of internal pores, with the yield stress of systems exhibiting substantial pores being minor. Systems characterized by a higher weight fraction of curing agents are more prone to pore formulation. Simulation of shape memory properties demonstrates that the entropy resulting from differences in molecular weight impacts the simulated system's shape fixation ratio and shape recovery ratio.

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Section: Introductionmentioning

confidence: 99%

Experimental and molecular dynamics study on thermal‐mechanical properties of epoxy shape memory polymers

Yang,

Liu,

et al. 2024

Journal of Polymer Science

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Effect of nanofibril cellulose empty fruit bunch‐reinforced thermoplastic polyurethane nanocomposites on tensile and dynamic mechanical properties for flexible substrates

Azzra,

Atiqah,

Fadhlina

et al. 2024

Polymer Composites

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Researchers and scientists have focused on the development and future opportunities of flexible sensors in food, environment and defense fields. In this study, we propose a flexible substrate material‐based nanofibril cellulose empty fruit bunch (NEFB)‐reinforced thermoplastic polyurethane (TPU) blend nanocomposite for flexible substrate materials. Untreated and treated nanofibril cellulose samples of empty fruit bunch (NEFB, 0, 1, 2, 3, 4 wt. %) were treated with 6 wt.% sodium hydroxide (NaOH) and subjected to internal Brabender mixer followed by a hot‐pressing machine. The density and tensile and dynamic mechanical properties of the nanocomposites were investigated for the treated and untreated samples. Tensile properties were characterized using a Universal Testing Machine, and the fracture mechanism after post‐tensile testing was determined by scanning electron microscopy (SEM). Increasing the content of untreated NEFB/TPU improved the tensile strength compared with 6% treated NEFB/TPU blend nanocomposites. Incorporating the nanofibril cellulose of empty fruit bunch at 2% into the TPU blend nanocomposites significantly increased E′, E" and Tg compared with other formulations.Highlights Nanocellulose derived from plants is considered a promising material for flexible substrates in electronics due to its robust mechanical properties and eco‐friendliness. Malaysia's abundant empty fruit bunch (EFB) resources make it a possible source of nanocellulose, which improves the properties of polymers. The effect of sodium hydroxide (NaOH) treatment on the compatibility of EFB‐derived nanocellulose with polymer matrices was investigated. The addition of nanocellulose, particularly at a concentration of 1%, significantly increases the tensile strength of thermoplastic polyurethane nanocomposites, whereas 6% NaOH treatment has no effect. Dynamic mechanical analysis reveals high storage modulus at 2% nanofibril cellulose empty fruit bunch (NEFB) and energy dissipation at 4% NEFB as well as enhanced interfacial bonding at 1% NEFB.

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TPU/EVA shape memory composites with improved properties fabricated via synergic incorporation of EVA-g-MAH compatibilizer and functional graphene oxide nanosheets

Zhao,

Lin,

Guo

et al. 2024

J Polym Res

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Structural, thermal, and viscoelastic response of nanoclay reinforced polylactic acid/thermoplastic polyurethane shape‐memory nanocomposites of low transition temperature

Cited by 6 publications

References 43 publications

Experimental and molecular dynamics study on thermal‐mechanical properties of epoxy shape memory polymers

Experimental and molecular dynamics study on thermal‐mechanical properties of epoxy shape memory polymers

Effect of nanofibril cellulose empty fruit bunch‐reinforced thermoplastic polyurethane nanocomposites on tensile and dynamic mechanical properties for flexible substrates

TPU/EVA shape memory composites with improved properties fabricated via synergic incorporation of EVA-g-MAH compatibilizer and functional graphene oxide nanosheets

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