The design, preparation, and properties of dual-crosslinking copolymerized systems based on hemp oil

Abstract

Novel, dual-crosslinking, reactive monomers of MAHHAGMA and HHAGE were synthesized using hemp oil (HO), and their successful syntheses were confirmed by FTIR and ¹H-NMR analyses. Then, three copolymerized materials were obtained: MAHHAGMA/single-crosslinking, MAHHAGMA/dual-crosslinking, and HHAGE/dual-crosslinking systems. The properties of three as-prepared materials were tested. The two dual-crosslinking systems had better hardness, crosslinking density, and tensile properties than the single-crosslinking system. The HHAGE/dual-crosslinking copolymer, a combination of polyurethane and polyoxazolidinone systems, had superior tensile strength (30.17 MPa), the greatest elongation at break (31.42%), and the highest glass transition temperature (78.21 °C). The dual-crosslinking copolymer of MAHHAGMA, a combination of polymerized epoxy and polymerized vinyl ester systems, had the highest crosslinking density (381.24 mol m⁻³) and the highest initial decomposition temperature (365.5 °C). Thus, the present study offers a novel preparation method of dual-crosslinking copolymerized biomaterials based on a vegetable oil.