2026-04-13T06:38:43Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/246242024-10-29T20:42:08Zcom_2072_452955com_2072_2054col_2072_453063

00925njm 22002777a 4500 dc Zaidi, Sihem author Thakur, Suman author Sánchez Rodríguez, Daniel author Verdejo Márquez, Raquel author Farjas Silva, Jordi author Costa i Balanzat, Josep author 2024-05 This work provides a comprehensive thermomechanical and rheological characterization of a high-performance epoxy resin synthesized from a vanillin derivative, vanillyl alcohol. The study includes a complete analysis of the curing and decomposition kinetics that enabled a Time-Temperature-Transformation plot accounting for gelation, vitrification, and resin degradation to be developed. These plots allow one to determine the optimal time and temperature processing conditions that will yield the best mechanical properties. Kinetic predictions and experimental results showed that this resin can be cured at room temperature in just a few hours, forming a solid gelled glass. Enhanced mechanical properties are achieved by post-curing the resin at temperatures above Tg∞ = 85.4 °C. With a dynamic storage modulus of 2.7 GPa, this bio-based resin proves to be a sustainable alternative to fossil-based resins whose primary source is the ever-prevalent bisphenol A diglycidyl ether. Thermal oxidation is the main cause of the mechanical deterioration at high temperatures, as revealed by FTIR spectroscopy The authors acknowledge AMADE and the GRMT project (PID2021–126989OB-I00 financed by the MCI, Spain). We also thank the Catalan Government for their support through 2017SGR1378. D.S.R. acknowledges the support received from the Beatriu de Pinós Programme and the Ministry of Research and Universities of the Government of Catalonia (Fellowship BP00069). S.T. acknowledges the SABIO project (PID2020–119546RJ-I00) financed by the MCIN/AEI, Spain Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier Resines epoxídiques -- Propietats mecàniques Epoxy resins -- Mechanical properties Optimal processing conditions of a bio-based epoxy synthesized from vanillyl alcohol