Dynamic Polymeric Materials via Hydrogen-bond Cross-linking: Effect of Multiple Network Topologies

Progress in Polymer Science, Journal Year: 2024, Volume and Issue: unknown, P. 101890 - 101890

Published: Sept. 1, 2024

Language: Английский

---

Dynamic Imine Bonds in Tire Tread Compounds: A Pathway to a Circular Economy and Reduced Waste

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

The tire industry is in constant transformation toward the development of more sustainable products while maintaining high performance. Nowadays, one most used strategies implementation circular economy (CE) model, based on reuse products, recycling, and conservation natural resources. One main goals introducing CE model to reduce amount end life tires (ELTs) that accumulate every year. For this, improvement recycling process these great importance. To face this challenge, research aims improve recyclability rubber by a novel approach apply dynamic imine bonds for silica–rubber coupling tread compounds as an alternative state-of-the-art silica/silane covalent coupling. formation new using bond was achieved reaction amine different aromatic aldehydes. Rubber with system show decrease wet grip indicator but improved mechanical performance, rolling resistance, superior fatigue behavior, potential compared compounds.

Language: Английский

---

A Strong, Tough, and Recyclable Styrene–Butadiene Rubber Achieved through Multiple Network Synergies of N-Acetyl-l-Cysteine

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Language: Английский

---

Synthesis of Cross-Linked Polyolefin Elastomers with High Performance Yet Good Reprocessability

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: 64(9), P. 5080 - 5086

Published: Feb. 24, 2025

The development of polymer materials with high performance and good reusability is critical to sustainability the industry. However, balance these two aspects in elastomers rubbers highly challenging. Here, we report synthesis a novel polyolefin elastomer (POE) dynamically cross-linked by an imine-linked boronic ester. It improves tensile strength at break (σ) POE 148.2%, Young's modulus (E) 92.6%, toughness (UT) 49.4%, slightly decreased elongation break. also has higher thermal resistance than pristine one presents steady storage plateau 2.8 MPa above 150 °C. Moreover, it can be reprocessed impressive recovery ratio UT 89.7% because dynamic exchanges ester imine. Dynamic mechanical analysis shows that cross-linking short characteristic relaxation time 9.6 min low apparent activation energy 65.1 kJ·mol–1. Our study on POEs provides new way for sustainable elastomers.

Language: Английский

---

Mechanically robust, creep resistant and malleability retentive elastomer vitrimer enabled by integrating hydrogen bonds and boronic easters

European Polymer Journal, Journal Year: 2023, Volume and Issue: 193, P. 112101 - 112101

Published: April 24, 2023

Language: Английский

---

High-Performance Olefin Thermoplastic Elastomer Based on Dynamically Cross-Linking Crystalline Macromers and Elastic Backbones

Macromolecules, Journal Year: 2024, Volume and Issue: 57(4), P. 1788 - 1794

Published: Feb. 13, 2024

Developing novel olefin thermoplastic elastomers (TPE-Os) that outperform those with well-defined block or grafted chain structures is both highly attractive and challenging. Here, we report the preparation of high-performance TPE-Os in a combinatorial way. Semicrystalline ethylene/1-octene/diene copolymers pendant vinyl groups crystalline polyethylene macromers terminal double bonds are synthesized, they dynamically linked dithiol-based cross-linker containing boronic ester bond to form new TPE-O. Due synergy between physical crystallization dynamic cross-linking, it exhibits significantly increased Young's modulus (E), elongation at break (ε), ultimate strength (σ), tensile toughness (UT) up 27.2 ± 3.8 MPa, 902 28%, 26.7 1.1 120.1 9.5 MJ·m–3, respectively, which among highest levels cross-linked traditional TPE-Os. It also has good elasticity 10-cycle elastic recovery ratio 71.4%; high melting point nearly 123.8 °C σ can even maintain 0.14–0.42 MPa 200 °C. The TPE-O offers reprocessing performance 113.2% for E, 98.5% ε, 95.8% σ, 92.5% UT. We believe our study will facilitate development next-generation higher performance.

Language: Английский

---

Biobased and aromatic Covalent Adaptable Networks: When architectures meet properties, within the framework of a circular bioeconomy

Materials Science and Engineering R Reports, Journal Year: 2024, Volume and Issue: 161, P. 100882 - 100882

Published: Nov. 9, 2024

Language: Английский

---

Biobased Recyclable Rubbers With Shape Memory, Self-welding, and Damping Properties by Cross-Linking Epoxidized Natural Rubber with Succinic Anhydride

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(51), P. 18123 - 18130

Published: Dec. 14, 2023

This study focuses on the development of green and high-performance recyclable polymers using cross-linked epoxidized natural rubber (ENR). ENR, derived from biobased rubber, offers reactive epoxy groups that make it an ideal raw material for creating materials. Succinic anhydride (SA) is employed as a cross-linking agent, forming dynamic ester bonds through ring-opening reactions with groups. The resulting ENR demonstrates excellent mechanical properties without need fillers (the tensile strength ENR40+SA-10 reached up to 17.85 MPa), along stable shape memory (shape fixed ratio > 97.0%, recovery 94.5%), high recyclability ratios elongation at break 95% after two recycling circles), self-welding properties. Moreover, adjustable Tg values (−30 19 °C) wide damping temperature range materials provide good characteristics, including those room temperature. simple efficient strategy new approach production ENR-based materials, which will potentially contribute reducing environmental pollution expending their applications in areas such vibration packaging.

Language: Английский

---

Research Progresses in Methods for Improving the Properties of Dynamic Covalent Polymer Networks

Macromolecular Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Dynamic covalent polymer networks (DCPNs) are a class of cross‐linked polymeric materials with good self‐healing properties, processability, and recyclability. These generally possess dynamic bonds which can undergo reversible cleavage reformation under certain conditions. The cross‐linking nature the endows them needed mechanical strength as well processibility, effectively bridging gap between traditional thermosets thermoplastics. However, in many cases, relying on alone cannot always achieve satisfactory material so modification DCPNs has been one hot spots this area. This review summarizes recent research progress DCPNs, including introduction multiple filler blending, analyzes how modifications improve specific properties. provides comprehensive overview diverse methods to manipulate structures properties may expand their potential applications.

Language: Английский

---

Dual-crosslinked Network Design

Royal Society of Chemistry eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 107 - 136

Published: April 28, 2025

The application of dynamic covalent bonds (DCBs) in rubber materials has been actively studied recent years. It is demonstrated that a creative combination different types crosslinked networks would be promising strategy to generate high-performance rubbers with balanced mechanical strength and toughness, structural stability, self-healing, multiple stimuli responsiveness. This chapter provides an overview studies on developing combine typical DCBs other kinds chemical (including DCBs, static bonds, sacrificial bonds). significant role dual-crosslinking improving the properties endowing functionalities analyzed. processing challenges research directions dual-crosslinked are discussed.

Language: Английский

---