Dense Hydrogen Bond Network Design of High-Strength Glycidyl Ester to Enhance the Mechanical Properties of Its CFRPs

• DOI: 10.1021/acs.macromol.4c01412
• Publication Date: 2024-08-05T18:59:40Z
• Authors: Jizhen Tian; Ji Zhou; Yunhua Yang; Junliang He; Yang Chen; Mei Liang; Zhengguang Heng; Huawei Zou
• Keywords: Mechanical strength

The significant disparity between the compressive and tensile strengths of carbon fiber reinforced polymer (CFRP) composites restricts their widespread application. Designing developing epoxy resin matrix materials with high strength modulus is crucial for improving performance composites. Here, carbonyl groups are introduced into molecules as hydrogen bond receptors, a novel trifunctional glycidyl ester TAEP successfully synthesized. construction dense network achieves remarkably strength. reaction mechanism various aromatic amine curing agents investigated first time using DFT calculations, revealing that proton transfer leads to formation hydroxyl groups, which can effectively prevent oxygen anions from damaging groups. And m-phenylenediamine (MPD) lower nucleophilic energy barriers higher energies preferred choice agent esters. cross-linking structures characterized through PALS, BDS, LF-NMR, XRD, molecular dynamics simulations, in situ IR, indicating presence facilitates activity local motion, while inherent receptors provide more interaction sites. enhanced intermolecular interactions superior force transmission capability contribute its reaching 111.92 MPa, significantly surpassing commercial resins like TDE85 mAFG90 systems. Additionally, system exhibits highest CFRPs (1247.91 MPa). This result offers substantial value potential preparation application high-performance CFRPs.