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Tunable mechanical properties of [Fe(pyrazine){Au(CN)2}2]–PVDF composite films with spin transitions

Abstract : Here we describe the elaboration and investigation of composites prepared from the spincrossover (SCO) complex [Fe(pyrazine){Au(CN) 2 } 2 ] and poly(vinylidene fluoride) matrix, with different contents of the active phase (10-35 wt%). Optical measurements demonstrated that all composites preserve temperature induced hysteretic spin transitions. Tensile mechanical analysis showed a non-linear change of the Young's modulus upon increase of the complex content. Thermomechanical analysis upon a constant strain demonstrated pronouncable alterations of the applied stress in the SCO region. Composites with smaller loads require less stress to attain a given strain in the high-spin state, however for those with high loads the behaviour is more sofisticated. The modelling of stress vs. temperature behaviour revealed that this may be interpreted through a miscellaneous interplay of expansion of both the polymer and the complex, the contribution of both components to the elastic properties of composites, and the effects of SCO on these properties.
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Contributor : Jose Elias Angulo-Cervera Connect in order to contact the contributor
Submitted on : Friday, December 10, 2021 - 10:30:38 AM
Last modification on : Thursday, January 6, 2022 - 10:51:36 AM


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Yurii Bibik, José Angulo-Cervera, Rostyslav Lampeka, Il'Ya Gural'Skiy. Tunable mechanical properties of [Fe(pyrazine){Au(CN)2}2]–PVDF composite films with spin transitions. Polymer, Elsevier, 2022, 238, pp.124410. ⟨10.1016/j.polymer.2021.124410⟩. ⟨hal-03474282⟩



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