In this research, shape memory polymers (SMPs) fabricated from bio-based benzoxazine resins, i.e. vanillin-furfurylamine-containing benzoxazine (V-fa) and eugenol-furfurylamine-containing benzoxazine (E-fa) resins, and bio-based epoxy resin, i.e. epoxidized castor oil (ECO), are investigated. Effects of ECO mass concentrations on curing characteristics, thermal stability, dynamic mechanical properties, and shape memory properties are determined by differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, and shape memory tests, respectively. Storage moduli at the glassy state and glass transition temperatures (T g ) of V-fa/ECO and E-fa/ECO copolymers decrease with increasing ECO mass concentrations. The bending tests performed with a universal testing machine are employed to evaluate the shape memory properties of the developed bio-based copolymers. V-fa/ECO SMPs show excellent shape fixity of 86%-94% at room temperature and high shape recovery at T g +20 °C of 81%-96%. V-fa/ECO SMPs can undergo fold-deploy shape memory cycles without altering the shape memory performances for at least 5 cycles. Good balance between shape memory performances and thermo-mechanical properties in the V-fa/ECO copolymer system is obtained when ECO mass concentration is 40% (w/w).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.