Zhong, Liuyue; Hao, Yanxin; Zhang, Junheng; Wei, Fang; Li, Tingcheng; Miao, Menghe; Zhang, Daohong published the artcile< Closed-Loop Recyclable Fully Bio-Based Epoxy Vitrimers from Ferulic Acid-Derived Hyperbranched Epoxy Resin>, Quality Control of 112-63-0, the main research area is recyclable epoxy vitrimer ferulate hyperbranched resin.
Epoxy vitrimers with dynamic covalent networks enable reprocessing and recycling of epoxy thermosets. However, achieving high mech. performance remains a challenge. In this work, ferulic acid-based hyperbranched epoxy resin (FEHBP) was synthesized to produce closed-loop recyclable and catalyst-free epoxy vitrimers without compromising its thermal and mech. properties. The incorporation of FEHBP with a hyperbranched topol. structure improved the tensile strength, modulus, and toughness of epoxy vitrimers through an in situ reinforcing and toughening mechanism. The hydroxyls of FEHBP catalyzed the dynamic transesterification and accelerated the reprocessing of epoxy vitrimers. Thus, the obtained epoxy vitrimers demonstrated excellent weldability, malleability, and programmability. Epoxy vitrimers with 10 phr FEHBP exhibited high tensile strength (126.4 MPa), usable Tg (94°C), fast stress relaxation (a relaxation time of 45 s at 140°C) and a retention of tensile strength (above 88.3%) upon recycling. The degradation products were reused to produce new epoxy vitrimers under mild conditions with similar mech. properties and thermal stability as the original epoxy vitrimers, leading to closed-loop recyclable, fully bio-based epoxy vitrimers with potential for industrial applications.
Macromolecules (Washington, DC, United States) published new progress about Complex modulus, tan δ. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics