High-performance polyacrylate oligomers enabled by disulfide networks
Year: 2025
Type: article
Abstract: Unsaturated acrylate oligomers exhibit low viscosity and appropriate flowability, making them ideal candidates in the coatings industry. The effective development and optimization of polyacrylate resins continue to be a major focus in the field of high-performance material design. However, the selectivity of the monomer reaction poses a challenge to fundamentally change the molecular structure of the polymer, and the filler reinforcement method exists the problem of long-term performance instability. In this paper, we designed and constructed a new class of crosslinking agents, which were synthesized by esterification between thioctic acid (TA) with inherent photosensitive S-S motifs and several small molecular glycidyl ethers, including 1,4-butanediol diglycidyl ether (1,4-BDE), 1,6-hexanediol diglycidyl ether (1,6-HDE), 1,3-benzenediol diglycidyl ether (1,3-BDE), and bisphenol A diglycidyl ether (BADE). By incorporating a specific proportion of the crosslinking agent into the polyacrylate oligomer, the performances of the cured film were obviously improved. Furthermore, bisphenol A glycidyl ether-modified disulfide system (BAT) with variable participation ratios was established to enhance thermal and mechanical properties. The optimized BAT coating demonstrated robust tensile strength (36.64 MPa), toughness (1.34 MJ m −3 ), and ideal T g (126.7 °C), as well as attractive hydrophobicity (97.6 °) and self-healing ability. As a proof of concept, the BAT 3 oligomer was used as the main resin for high-load filler coating, which possessed suitable viscosity (212 Pa·s) and mechanical strength, with resistance to aging and low-temperature cracking. Overall, this work provides an opportunity to develop high-performance polyacrylate materials based on dynamic cross-linking bonds and can be applied well in high-load filler coatings. • High-performance photocurable coatings were designed based on photoresponsive disulfides modified polyacrylate oligomer. • Different structural units and designed amounts of disulfide endowed the coatings with adjustable properties. • The dynamic adaptable network provided the coatings with favorable heat resistance, mechanical and self-healing properties. • The disulfide-doped oligomer BAT 3 high-load filler coating shows competent comprehensive performances.
Source: Next Materials
Language: English
Topic: Epoxy Resin Curing Processes
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,280
OpenAlex ID: W4408970793