Copolymerization of Ethylene With Polar Monomers by Group 4 Catalysts DOI
Qian Li, Zifang Guo, Xinwei Li

et al.

Polymer Reviews, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 60

Published: Dec. 24, 2024

The research of copolymerization ethylene with polar monomers catalyzed by group 4 metal complexes has gain substantial achievement, and the functional polyolefins, produced through various structures catalysts monomers, have already shown their unique applications in multiple fields. There are kinds effective strategies to improve activity incorporation: been expanded from metallocenes half-metallocenes non-metallocenes; new cocatalysts catalytic systems developed; pretreated masking agents; groups largely enriched. In this review, concluded compared, we looking forward summarizing relationship between structure reactivity providing advice for design catalysts. Moreover, properties potential functionalized polyolefins introduced.

Language: Английский

Nickel Catalyst With Excellent Thermal Stability for Ethylene Polymerization and Copolymerization DOI Open Access

Wanlu Tian,

Hongyu Guan, W.S. Wang

et al.

Applied Organometallic Chemistry, Journal Year: 2025, Volume and Issue: 39(3)

Published: Feb. 12, 2025

ABSTRACT Recently, a series of inexpensive nickel‐based phosphine phenol catalysts have been synthesized for catalyzing the copolymerization ethylene and polar monomers to prepare functionalized polyolefins. However, it is still challenging achieve homogeneous nickel that catalyze polymerization or at high temperatures (up 150°C) with activity. This work bulky steric hindrance electron donating groups, which were used coordination temperatures. These exhibited activity excellent thermal stability 150°C, producing polyethylene molecular weight up 102.7 × 10 4 g mol −1 . More importantly, these can range 120°C, improving surface properties

Language: Английский

Citations

0
Insights into Chemical Recycling and Upgrading Strategies for Polyolefin-Based Plastics DOI
Mei Lu,

Shengdi Wang,

Min Su

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: 64(11), P. 5765 - 5781

Published: March 5, 2025

Plastic waste, particularly the dominant polyolefins, presents a growing environmental issue due to its chemical stability and low recycling rates. Although various methods are proposed address plastic strong carbon–carbon bonds within as well degradation of mechanical strength additional value by conventional methods, pose great challenges their downstream usage. With this regard, paper emphasizes polyolefins into renewable resources, including carbon materials, liquid fuels, hydrocarbon chemicals, thermal catalytic methods. An in-depth discussion on feasibility limitations promising techniques is provided, such association between reactor design, process optimization, catalyst preparation, product distribution. Specifically, structure–function relationship over different catalysts was highlighted, molecular sieve, precious metal, transition ion liquid. In addition, future challenge regarding simultaneous treatment mixed plastics also summarized, along with copyrolysis waste biomass. As such, underscores sustainable scalable solutions for polyolefin upcycling, which may shed light upon industrial application resources.

Language: Английский

Citations

0
Synthesis of Graft‐Modified Polyolefin Compatibilizers for Compatibilizing Mixed Plastics DOI
Yu Chen, Yuxin Ding, Pei Li

et al.

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Comprehensive Summary Recycling polyolefin and other plastic mixtures encounters significant obstacles due to the intricate nature economic inefficiencies of physically separating vast streams mixed waste. Incorporating compatibilizers emerges as a viable strategy diminish interfacial energy bolster compatibility, ultimately yielding homogeneous products. In this contribution, polar polyolefins featuring metal dynamic cross‐linking networks were synthesized by tandem polymerizing ionic cluster type monomers olefins. Subsequent treatment with HCl aqueous solution esterification polyester precursors yields high‐performance grafted for polymer compatibilizing. For PP/PC melting blends, adding 5 wt% graft‐modified results in tougher blends that surpass performance corresponding virgin iPP elongation at break (εb). Polar containing sodium carboxylate groups play dual role compatibilizing PET/HDPE acting both nucleating agents. Moreover, enables production comprising ternary polymers, which can be employed blends.

Language: Английский

Citations

0
Degrading hydrophilic PVC and hydrophobic PS microplastics by electrochemical oxidation technology: Comparation for BDD, PbO2, and DSA anodes DOI
Xinyu Liu,

Liwei Qiu,

Yanwen Bai

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116686 - 116686

Published: April 1, 2025

Language: Английский

Citations

0
Mechanical Recycling of New and Challenging Polymer Systems: A Brief Overview DOI Creative Commons
Vincenzo Titone, Luigi Botta, Francesco Paolo La Mantia

et al.

Macromolecular Materials and Engineering, Journal Year: 2024, Volume and Issue: 310(1)

Published: Nov. 5, 2024

Abstract Pollution from plastics is a major issue in the current context, prompting scientific community to focus its efforts on recycling these materials. Mechanical emerges as most popular due practicality and cost‐effectiveness. In fact, with increase environmental awareness, adoption of new circular economy models, stricter regulations mandating disposal recycling, lower costs compared other techniques, this type taking predominant role over method. However, presence variety products different polymeric nature, introduction biodegradable products, complexity multilayer packaging combining polymers, without concrete solutions for create heterogeneous range materials that leaks into environment. The literature actively addressing challenges, review aims explore latest strategies enhancing mechanical challenging polymer systems. Specifically, it explores originally designated landfill, incineration or composting, focusing advancements management previously overlooked problematic system. This underexplored perspective seeks offer insights innovative can transform waste advance more sustainable practices.

Language: Английский

Citations

2
Preparation of Toughened Bimodal Ultrahigh-Molecular-Weight Polyethylene by a Coanchoring Strategy DOI
Zhanshan Ma, W.S. Wang,

Wenmin Pang

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(21), P. 13210 - 13216

Published: Oct. 21, 2024

Language: Английский

Citations

1
Polyolefin containing multi-block polymers and upcycling of mixed plastics DOI
Li Wu, Daohong Liao, Yougui Li

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Language: Английский

Citations

1
In-Situ Grafted Ethylene Propylene Diene Monomer (EPDM) Rubber Multiblock Copolymers as Compatibilizers for Polyethylene (PE) and Isotactic Polypropylene (iPP) Blends DOI
Feng Yu,

Chuanjiang Long,

Sitong Feng

et al.

Polymer, Journal Year: 2024, Volume and Issue: unknown, P. 127959 - 127959

Published: Dec. 1, 2024

Language: Английский

Citations

1
Copolymerization of Ethylene With Polar Monomers by Group 4 Catalysts DOI
Qian Li, Zifang Guo, Xinwei Li

et al.

Polymer Reviews, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 60

Published: Dec. 24, 2024

The research of copolymerization ethylene with polar monomers catalyzed by group 4 metal complexes has gain substantial achievement, and the functional polyolefins, produced through various structures catalysts monomers, have already shown their unique applications in multiple fields. There are kinds effective strategies to improve activity incorporation: been expanded from metallocenes half-metallocenes non-metallocenes; new cocatalysts catalytic systems developed; pretreated masking agents; groups largely enriched. In this review, concluded compared, we looking forward summarizing relationship between structure reactivity providing advice for design catalysts. Moreover, properties potential functionalized polyolefins introduced.

Language: Английский

Citations

1