Reprocessable Silyl Ether-Based Dynamic Covalent Poly(dimethylsiloxane) Networks with Superb Thermal Stability and Creep Resistance DOI
Siyuan Chen, Jie Cao, Junping Zheng

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(7), P. 4215 - 4225

Published: April 3, 2024

Introducing covalent adaptable networks (CANs) into polydimethylsiloxane (PDMS) elastomers is an effective approach to solving the recycling issue of thermoset PDMS materials. However, CANs generally exhibit favorable dynamic properties achieve efficient recycling, which leads poor thermal stability and creep resistance. Herein, we successfully constructed silyl ether-based within system by incorporating thermally stable ether linkages, resulting in reprocessable with excellent mechanical properties, remarkable stability, desirable Compared samples without networks, prepared elastomer presented a 70 °C increase T50 (the temperature at 50% weight loss), reaching as high 635 °C. Meanwhile, after 10 reprocessing cycles, can still be almost completely restored, demonstrating superior reprocessability. More importantly, owing exhibited resistance 120 Therefore, rational construction balance between recyclability.

Language: Английский

Bio-based hyperbranched epoxy resins: synthesis and recycling DOI
Yu Jiang, Li Jiang, Dan Li

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 53(2), P. 624 - 655

Published: Dec. 18, 2023

This review provides a comprehensive overview of the synthesis, degradation, and recycling bio-based hyperbranched epoxy resins.

Language: Английский

Citations

68
Closed-loop recycling of tough epoxy supramolecular thermosets constructed with hyperbranched topological structure DOI Creative Commons
Junheng Zhang, Can Jiang,

Guoyan Deng

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 7, 2024

The regulation of topological structure covalent adaptable networks (CANs) remains a challenge for epoxy CANs. Here, we report strategy to develop strong and tough supramolecular thermosets with rapid reprocessability room-temperature closed-loop recyclability. These were constructed from vanillin-based hyperbranched resin (VanEHBP) through the introduction intermolecular hydrogen bonds dual dynamic bonds, as well formation intramolecular cavities. structures confer remarkable energy dissipation capability thermosets, leading high toughness strength. Due imine exchange reversible noncovalent crosslinks, can be rapidly effectively reprocessed at 120 °C within 30 s. Importantly, efficiently depolymerized room temperature, recovered materials retain structural integrity mechanical properties original samples. This may employed design tough, recyclable practical applications.

Language: Английский

Citations

20
Superior Epoxy Vitrimer Containing Acetal and Disulfide Bonds for Achieving High Mechanical Properties, Reprocessability, and Degradability DOI

Nianzhao Gao,

Yanglei Zheng,

Jianan ShangGuan

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(11), P. 5450 - 5460

Published: May 29, 2024

The development of sustainable composites necessitates biobased epoxy resins that are highly recyclable and degradable; however, the integration mechanical, reprocessing, rapid degradation properties into a single resin remains significant challenge. present study proposes straightforward approach to overcoming problem by combining two labile covalent bonds an resin. combination acetal disulfide demonstrates synergistic effect on performance resin, leading ultrafast polymer. carbon fiber-reinforced composite with matrix shows tensile strength exceeding 630 MPa, but degrades completely within just 8 min, while recovered fibers display nondestructive characteristics similar those original material. Moreover, we designed good self-healing reprocessing ability. Scratches surface can be self-healed heating, powdered reshaped under hot press. These findings offer new preparation composites, highlighting importance thermosetting polymers.

Language: Английский

Citations

16
Self-Healing and Recyclable Castor Oil-Based Epoxy Vitrimer Based on Dual Dynamic Bonds of Disulfide and Ester Bonds DOI
Yuehong Zhang, Shutong Zhang, Mengjiao Zhai

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(14), P. 8399 - 8408

Published: July 15, 2024

Language: Английский

Citations

11
Vanillin-based dual dynamic epoxy building block: a promising accelerator for disulfide vitrimers DOI Creative Commons

Solène Guggari,

Fiona Magliozzi, Samuel Malburet

et al.

Polymer Chemistry, Journal Year: 2024, Volume and Issue: 15(13), P. 1347 - 1357

Published: Jan. 1, 2024

A dual-dynamic bio-based epoxy building block (DDBB) with both imine and disulfide bonds synthesized from cystamine vanillin showed accelerated dynamic exchanges in vitrimer formulations.

Language: Английский

Citations

10
Epoxy Vitrimer with Excellent Mechanical Properties and High Tg for Detachable Structural Adhesives DOI
Anping Dong,

Qiguang Liu,

Huarui Yao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(9), P. 14578 - 14590

Published: Feb. 22, 2025

It is a long-standing challenge for thermoset resins to simultaneously achieve outstanding thermomechanical and mechanical properties as well rapid network reconfiguration due the trade-off between chemical bond transformation stability of network. The design vitrimer topology an effective strategy address above issues. Here, we prepared epoxy material (DGEBA-API-MHHPA) with excellent high glass-transition temperature (Tg) by introducing rigid-flexible integrated side chains [1-(3-aminopropyl) imidazole (API)], which endow DGEBA-API-MHHPA multiple interactions including "internal antiplasticization" effect, intermolecular hydrogen bonds, π-π interactions. Moreover, introduction Zn2+ facilitates transesterification, enabling fast rearrangement Specifically, relaxation time DGEBA-API0.2-MHHPA0.8-Zn reaches 65 s at 200 °C. Meanwhile, Zn2+-imidazole coordination bonds energy dissipation improve toughness resulting exhibits self-healing recyclable behaviors possesses 80.3 MPa tensile strength, 3.25 GPa Young's modulus, 7.2 MPa·m1/2 fracture (KIC), Tg 129 Concurrently, can be applied detachable structural adhesives various substrates used matrixes electrically composites. This skillful widely referenced in large-scale manufacturing high-performance dynamic covalent their composites performance.

Language: Английский

Citations

1
High-Impact Epoxy Resins with Superior Hydrophobicity Toughened by Epoxy Functionalized Poly(olefin-alt-maleimide) Derivatives DOI

Quanbing Shen,

Yan Chen, Xiuyi Lin

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(9), P. 4964 - 4974

Published: April 25, 2024

The inherent disadvantages of low toughness and high brittleness severely limit the widespread applications epoxy resins (EPs), it is highly desirable to toughen EPs while maintaining their rigidity thermal properties. Herein, a type functionalized poly[1-hexene-alt-N-(2-methoxymethyl oxirane)maleimide] (PHMIEP) was specially designed synthesized by self-stabilized precipitation polymerization (2SP) 1-hexene maleic anhydride, followed imidization, hydroxymethylation, epoxidation. Due presence both rigid cyclic maleimide units flexible pendant butyl groups, PHMIEP can serve as an effective toughening modifier for EPs. With 4,4-diaminodiphenylmethane curing agent, with 5 phr showed record-high impact strength tensile 54.04 kJ/m2 95.84 MPa, which were 121 23% higher than neat EPs, respectively. Moreover, PHMIEP-modified exhibited similar stability glass-transition temperature those More impressively, resultant superior hydrophobicity in comparison unmodified due incorporation hydrophobic imide alkyl segments. Furthermore, order reduce preparation cost, complex olefinic mixtures derived from cracking product raffinate oil used directly replace 1-hexene. modified poly[cracked oil-alt-N-(2-methoxymethyl (PRMIEP) also excellent comprehensive enhanced toughness, strength, comparable stability, PHMIEP/PRMIEP-toughened demonstrate great potential high-performance resin matrix application fields electronic packaging, coating, engineering plastics.

Language: Английский

Citations

4
A Comprehensive Review on Biobased Hyperbranched Polymers DOI

Komal Bhutra,

S. Datta,

Aarti P. More

et al.

Polymer Bulletin, Journal Year: 2024, Volume and Issue: 81(14), P. 12287 - 12345

Published: May 16, 2024

Language: Английский

Citations

4
Epoxy-based multifunctional re-bondable polymer with self-healing, shape memory and superb bonding properties DOI
Peixin Niu, Zhiying Zhao, Jun Zhu

et al.

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 30 - 39

Published: Sept. 2, 2024

Language: Английский

Citations

4
Eugenol-Based Epoxy Materials with High Biobased Carbon Content and Their Structure–Property Relationships DOI

Langlang Dai,

Yuehong Zhang,

Fei Ma

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

In order to reduce dependence on petroleum resources, three different biobased epoxy monomers (Eu-EP-1, Eu-EP-2, and Eu-EP-3) with a carbon content of 76.9%–83.3% were prepared from eugenol, which can be derived lignin. Three eugenol-based thermosets (Eu-EP-1/IPDA, Eu-EP-2/IPDA, Eu-EP-3/IPDA) then obtained by curing Eu-EP monomer commercial IPDA (isophorone diamine) hardener; the activation energy was in range 37.4–48.2 kJ/mol, gel ranged 95.4%–96.5%, cross-linking degree reached 1185–2119 mol/m3, confirming that cured form network structures. Therefore, Eu-EP/IPDA had excellent in-service performance Tg 63.9–76.3 °C tensile strength 34.7–43.1 MPa. However, permanent chemical bonds difficult recycle. Since Eu-EP-2/IPDA balanced performance, Eu-EP-2 selected develop recyclable Eu-EP/AFD vitrimers AFD (4,4′-dithiodiphenylamine). The resulting Eu-EP-2/AFD1.00 vitrimer 79.4 39.2 MPa, remodeling could achieved hot pressing at 200 for 6 h; self-healing scratched material heating 180 2 h, dissolved mercaptoethanol. is potential sustainable development materials recyclability. This study offers facile solution materials.

Language: Английский

Citations

0