Bio-Based Epoxy Shape-Memory Thermosets from Triglycidyl Phloroglucinol

Polymers
David SantiagoSilvia De la Flor

Abstract

A series of bio-based epoxy shape-memory thermosetting polymers were synthesized starting from a triglycidyl phloroglucinol (3EPOPh) and trimethylolpropane triglycidyl ether (TPTE) as epoxy monomers and a polyetheramine (JEF) as crosslinking agent. The evolution of the curing process was studied by differential scanning calorimetry (DSC) and the materials obtained were characterized by means of DSC, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), stress-strain tests, and microindentation. Shape-memory properties were evaluated under free and totally constrained conditions. All results were compared with an industrial epoxy thermoset prepared from standard diglycidyl ether of Bisphenol A (DGEBA). Results revealed that materials prepared from 3EPOPh were more reactive and showed a tighter network with higher crosslinking density and glass transition temperatures than the prepared from DGEBA. The partial substitution of 3EPOPh by TPTE as epoxy comonomer caused an increase in the molecular mobility of the materials but without worsening the thermal stability. The shape-memory polymers (SMPs) prepared from 3EPOPh showed good mechanical properties as well as an excellent shape-memory performance. They showed almo...Continue Reading

References

Mar 16, 2006·Proceedings of the National Academy of Sciences of the United States of America·R MohrA Lendlein
Jul 28, 2009·Advanced Functional Materials·Christopher M YakackiKen Gall
Feb 27, 2013·Chemical Society Reviews·Damien HabaultYue Zhao
Oct 16, 2013·Chemical Reviews·Rémi AuvergneJean-Pierre Pascault
Jan 21, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Feifei NgSylvain Caillol
Dec 29, 2017·Polymers·József Karger-Kocsis, Sándor Kéki
Jan 2, 2020·Polymers·David SantiagoÀngels Serra

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Methods Mentioned

BETA
differential scanning calorimetry

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