Soft Matter, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 18, 2024
The mass density is a key controllable variable in polymers with dynamic crosslinkers, one that can be used to facilely tune their properties.
Language: Английский
Langmuir, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 22, 2025
Nanocomposites of epoxy with Fe3O4 featuring dynamic disulfide bonds were fabricated. To facilitate the dispersion nanoparticles, we synthesized poly(ε-caprolactone)-grafted which then incorporated into to generate robust interfacial interactions between and inorganic nanoparticles. Through this approach, a fine nanoparticles in matrix was successfully obtained. The incorporation resulted being effectively toughened; critical stress field intensity factor (KIC) enhanced twice as control epoxy. Thanks integration covalent (i.e., bonds), nanocomposites displayed excellent reprocessable or recyclable properties. Depending on contents can be modulated have shape recovery desired transition temperatures. Benefiting from dynamicity bonds, memory behavior featured reconfigurability. Inheriting nature likewise superparamagnetic photothermal By taking advantage behavior, triggered through infrared laser irradiation noncontact manner.
Language: Английский
Citations
1
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 7, 2025
Covalent adaptable networks are frequently studied as alternatives to conventional thermosetting polymers because they can be recycled and reprocessed; however, the inclusion of dynamic covalent bonds within high-temperature (or high-performance) engineering thermoplastics remains largely unexplored. In this work, disulfide-containing thermoplastic polyimides were synthesized compared nondynamic polyimides. The thermomechanical properties these examined by utilizing several techniques, including thermogravimetric analysis, differential scanning calorimetry, along with use rheometric quartz crystal microbalance, traditional mechanical analysis. resulting experimental data suggest that thermal stability compositions was slightly reduced in comparison analogs, but exhibit a similar response under service conditions. also demonstrated significantly easier reprocessability via compression molding than their counterparts.
Language: Английский
Citations
0
ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 14, 2025
Language: Английский
Citations
0
ACS Macro Letters, Journal Year: 2024, Volume and Issue: unknown, P. 1545 - 1550
Published: Oct. 30, 2024
Incorporating dynamic covalent linkages into thermosets can endow previously unrecyclable materials with new functionality and reprocessing options. Recent work has shown that the properties of resulting adaptable networks (CANs) are highly dependent on network topology, specifically phenomenon percolation, when permanent form a connected skeleton spans material. Here, we use model glassy disulfide based CAN to assess merits mean-field percolation theory as tool describe topology CANs. After challenging both experimental data coarse-grained molecular dynamics simulation, find approach is surprisingly accurate, despite its simplifying assumptions. The particularly well suited unique context mixed-composition CANs provides practical guidance how design for reprocessability.
Language: Английский
Citations
2
Macromolecules, Journal Year: 2024, Volume and Issue: 57(22), P. 10530 - 10538
Published: Nov. 4, 2024
Improving the heat resistance of epoxy resins remains an important and challenging issue across a wide variety applications. One strategy to address this challenge is design cured based on multifunctional epoxy. Compared conventional difunctional resins, are expected easily form highly cross-linking structure, which anticipated contribute enhanced resistance. However, there lack information about detailed mechanisms formation such structures their effects physical properties. We herein tracked kinetics curing reactions trifunctional epoxies with amine hardener. Despite identical reactivity groups in both base monomers, system faster. In addition, system, gelation was followed by vitrification, while vitrification occurred simultaneously. The accelerated reaction observed could be explained terms localized temperature increase from heat, subsequently following reactions. resulting post-cured resin did not exhibit clear glass transition. This, so-called Tg-less behavior due transition unit being higher than its decomposition temperature. This mechanism for behavior, combined reactions, provides valuable insights thermosetting thermal stability.
Language: Английский
Citations
2
Soft Matter, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 18, 2024
The mass density is a key controllable variable in polymers with dynamic crosslinkers, one that can be used to facilely tune their properties.
Language: Английский
Citations
2