Intrinsic approach of eco‑friendly poly benzoxazine‑co‑maleicanhydride) materials for self‑healing applications

Abstract
In modern era, self-healing polymers have been under investigation due to their exclusive mechanical, thermal and electrical properties that could potentially make them enormously valuable in abundant engineering applications. This work explores a new strategy to develop bio-based eco-friendly poly(benzoxazine-co-maleicanhydride) [poly(E-aee-co-MA)] materials for intrinsic autonomous self-healing applications. Here in, renewable Eugenol (E), aminoethoxyethanol (aee) and paraformal�dehyde was chosen to synthesize a biobased E-aee monomer with hydroxy functionality through Mannich like ring closure reaction. Later, E-aee was copolymerized with maleic anhydride (MA) precursor through thermal ring opening polymeriza�tion. The structural features of the resulting E-aee and pre(E-aee-co-MA) materials were confrmed by 1
H NMR and FT-IR spectroscopy. The optical property of the E-aee measured by using fuorescent spectrum. We used DSC and FT-IR spec�troscopy to investigate the polymerization behavior of biobased benzoxazine monomer (poly(E-aee)) and the copolymer of
poly(E-aee-co-MA). DMA and TGA were used to determine the mechanical and thermal properties of cross linked biobased
benzoxazine. SEM and optical microscope were used to screening the self-healing behavior of poly[E-aee-co-MA]. The
developed poly[E-aee-co-MA] shows good and repeated self-healing ability due to supra-molecular action and inter and intra
hydrogen bonding interactions between carboxylic acid and hydroxy functionality in the network structure and confrmed
by computational studies in density functional theory (DFT) calculation. Especially, the described self-healing biobased
benzoxazine were manufactured with readily available raw-materials, they are fast to manufacture and shape controller.