ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 18, 2024
Language: Английский
International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 261, P. 129563 - 129563
Published: Jan. 25, 2024
Language: Английский
Citations
4
Macromolecules, Journal Year: 2024, Volume and Issue: 57(5), P. 1962 - 1969
Published: Feb. 21, 2024
The incorporation of dynamic covalent bonds is an efficacious approach to tackle the challenge recycling thermosetting plastics. Herein, we developed a facile method for constructing recyclable polymers through Knoevenagel condensation (KC) reaction. First, found that KC reaction based on cyanoacetate and benzaldehyde showed high conversion rate exchange under catalysis 4-dimethylaminopyridine (DMAP). Then, three kinds with different flexible chains (P-CC, P-CO, P-PCL) C═C were successfully prepared by DMAP-catalyzed P-CC, P-PCL show cross-linking density, gel fraction, elastic modulus. More importantly, all these exhibit good reprocessability chemical recyclability. This work demonstrates feasibility using construct polymers, which shows great potential in sustainable materials.
Language: Английский
Citations
4
Polymer Degradation and Stability, Journal Year: 2024, Volume and Issue: 227, P. 110834 - 110834
Published: May 23, 2024
Language: Английский
Citations
4
ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(15), P. 9191 - 9199
Published: July 25, 2024
In this work, biodegradable and polyester-based vitrimers possessing dynamic ester bonds are prepared by chemically cross-linking −OH-containing poly(glycerol sebacate) (PGS) with the formation of interchain bonds. enzymatic biodegradation tests, demonstrate high extents degradation (of about 85–90 wt %) after 60 days at 37 °C. The excess hydroxyl groups in bring a catalytic effect to transesterification. catalyst-free exhibit stress relaxation time 390 s 190 °C, an activation energy 45.0 kJ mol–1, glass transition temperature 8.0 topology freezing 48.7 Possessing both PGS main chains side sites, topography isomerization changes their mechanical properties under thermally recycling processes. has been demonstrated as effective precursor for preparation corresponding vitrimers. Moreover, processes could be interest further studies potential applications.
Language: Английский
Citations
4
Materials Science and Engineering R Reports, Journal Year: 2024, Volume and Issue: 161, P. 100882 - 100882
Published: Nov. 9, 2024
Language: Английский
Citations
4
ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 15(1), P. 2246 - 2255
Published: Dec. 23, 2022
In the current context of sustainable chemistry development and new regulations, aminolysis cyclic carbonate is one most promising routes to nonisocyanate polyurethanes, also called polyhydroxyurethanes (PHU). this study, a kind shape memory PHU vitrimers with outstanding mechanical properties chemical recyclability prepared. The monomer employed for form PHUs bis(six-membered carbonate) 4,4'-biphenol (BCC-BP), which synthesized by bi(1,3-diol) precursors CO2. synthetic strategy, isocyanate-free employing CO2 as building block, environmentally friendly suits concept carbon neutrality. thermal properties, dynamic behaviors are explored. maximum breaking strength elongation at break resultant reach 65 MPa 452%, respectively, exceeding other reported PHU-based materials in combined performance. Such material can lift up load 4700 times heavier than its own weight recovery process. Finally, be regenerated through alcoholysis realize recycling. This work provides feasibility study green approach designing novel properties.
Language: Английский
Citations
18
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163848 - 163848
Published: May 1, 2025
Language: Английский
Citations
0
Polymer Chemistry, Journal Year: 2023, Volume and Issue: 14(44), P. 5004 - 5013
Published: Jan. 1, 2023
A multifunctional curing agent for epoxies in situ forms dynamic and permanent covalent bonds a one-pot reaction the preparation of epoxy vitrimers.
Language: Английский
Citations
9
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 6, 2024
Abstract Vitrimers are promising next‐generation materials, often exhibiting superior properties such as mechanical strength and solvent resistance compared to their thermoplastic counterparts, while still featuring recyclability due dynamic covalent crosslinks. The most common strategy recycle vitrimers is via reprocessing at high temperatures, others utilize chemical degradation reobtain the constituent monomers. This work presents a new approach toward by selectively breaking of vitrimer's crosslinks, turning it back into thermoplastic. allows for be achieved in more sustainable manner lower temperatures shorter times. After desired shape has been obtained, facile re‐crosslinking turns material vitrimer, with full restoration thermal stability, properties, gel fraction. To achieve this, carbene C─H insertion utilized introduce an imine‐based crosslinker various thermoplastics plastic mixtures convert them vitrimers. Properties typical retained polymer network Arrhenius‐type relationship between stress relaxation rate temperature observed, its elongation break tensile toughness, particularly significantly enhanced, first crosslinking, then further enhanced up 8 folds reversible crosslinking process.
Language: Английский
Citations
3
Reactive and Functional Polymers, Journal Year: 2023, Volume and Issue: 191, P. 105653 - 105653
Published: June 27, 2023
Language: Английский
Citations
7