Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide A class of bio-based bifunctional phthalonitrile (PN) resins composed of cinnamaldehyde derivatives, aminophenol, and end-capped with a PN moiety is detailed. The cinnamic-imine PN (CIPN) resins were synthesized by utilizing environmentally friendly solvents methanol (MeOH) and acetone at ambient temperatures. Characterization of the resins was conducted via proton ( 1 H) and carbon ( 13 C) nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR), mechanical analysis, single crystal X-ray diffraction (XRD), and rheometry. The CIPN resins were self-curing due to the vinylic, imine, and PN moieties present and displayed a range of viscosities from 153–1546 cP at 225 °C. The resulting CIPN polymers were prepared by post-curing up to 380 °C and exhibited excellent thermal stability with T d5% above 510 °C up to an 80% char yield. Moderate brittleness ranging from an initial storage modulus ( G ′ at 25 °C) of 86–1295 MPa was observed among the CIPN resins. This combination of properties suggests that the bifunctional CIPN resins are excellent materials for high temperature thermosets in composite applications.
Source: Polymer science & technology.
Language: English
Topic: Epoxy Resin Curing Processes
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409161050