Resources Conservation and Recycling, Journal Year: 2024, Volume and Issue: 215, P. 108113 - 108113
Published: Dec. 31, 2024
Language: Английский
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 6, 2025
The distinctive rheological behavior of associative polymers (APs) is commonly attributed to the supramolecular interactions between stickers, where transient bonds are continually forming and breaking. This ongoing disruption reconstruction significantly extend terminal relaxation time, endowing APs with properties similar those entangled polymers. Based on fundamental sticky Rouse model (SRM), can be understood as a result combination strand motion interactions. However, this explanation may overly simplistic. presence multiple modes arising from broader range molecular processes introduces complexity, their individual contributions time remain uncertain. In work, we focus decoupling these modes. Our findings reveal that, beyond interactions, also influenced by factors such loss cross-links, reassociation dynamics, small molecule reactants. Furthermore, difference activation energy required for magnitude reaction kinetic stickers plays crucial role in determining distribution time. We believe that work offers significant insights into linear viscoelasticity (LVE) APs.
Language: Английский
Citations
1
Polymers, Journal Year: 2024, Volume and Issue: 16(10), P. 1373 - 1373
Published: May 11, 2024
Covalent adaptable networks and vitrimers are novel polymers with dynamic reversible bond exchange reactions for crosslinks, enabling them to modulate their properties between those of thermoplastics thermosets. They have been gathering interest as materials recycling self-healing properties. In this review, we discuss different molecular simulation efforts that used over the last decade investigate understand nanoscale behaviors covalent vitrimers. particular, dynamics, Monte Carlo, a hybrid dynamics Carlo approaches model reaction, which is main mechanism since it controls both mechanical rheological behaviors. The techniques presented yield sufficient results structure well responses such networks. benefits each method highlighted. use other tools theoretical models machine learning has included. We noticed, amongst most prominent results, stress relaxes reaction happens, at temperatures higher than glass transition temperature, better more BERs observed. lifetime crosslinks follows, moderate high temperatures, an Arrhenius-like temperature dependence. note modeling certain like melt viscosity topology freezing according behavior ruled by either Williams–Landel–Ferry equation or Arrhenius equation. Discrepancies in dissociative associative discussed. conclude stating material parameters atomistic factors, nanoscale, not yet taken into account lacking current literature.
Language: Английский
Citations
8
Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1824 - 1824
Published: April 18, 2025
This study presents a sustainable approach to transform waste cooking oil (WCO) into multifunctional 3D-printable photocurable elastomer with integrated self-healing capabilities. A linear monomer, WCO-based methacrylate fatty acid ethyl ester (WMFAEE), was synthesized via sequential strategy of transesterification, epoxidation, and ring-opening esterification. By copolymerizing WMFAEE hydroxypropyl acrylate (HPA), novel developed, which could be amenable molding using an LCD light-curing 3D printer. The resulting WMFAEE-HPA exhibits exceptional mechanical flexibility (elongation at break: 645.09%) autonomous room-temperature properties, achieving 57.82% recovery elongation after 24 h 25 °C. Furthermore, the material demonstrates weldability (19.97% retained 12 80 °C) physical reprocessability (7.75% retention initial reprocessing). Additional functionalities include pressure-sensitive adhesion (interfacial toughness: 70.06 J/m2 on glass), thermally triggered shape memory behavior (fixed -25 °C reversible deformation/recovery ambient conditions), notable biodegradability (13.25% mass loss 45-day soil burial). Molecular simulations reveal that unique structure monomer enables dual mechanism room temperature without external stimuli: chain diffusion entanglement-driven gap closure, followed by hydrogen bond-mediated network reorganization. synergy between diffusion/entanglement dynamic bond reorganization allows system achieve balance integration. Moreover, integration these attributes highlights potential this WCO-derived for various possible printing applications, such as flexible electronics, adaptive robotics, environmentally benign adhesives, so on. It also establishes paradigm converting low-cost biowastes high-performance smart materials through precision molecular engineering.
Language: Английский
Citations
0
Resources Conservation and Recycling, Journal Year: 2024, Volume and Issue: 215, P. 108113 - 108113
Published: Dec. 31, 2024
Language: Английский
Citations
0