4.7 Article

Fate of the RAFT End-Group in the Thermal Depolymerization of Polymethacrylates

Related references

Note: Only part of the references are listed.
Article Polymer Science

Light-accelerated depolymerization catalyzed by Eosin Y

Valentina Bellotti et al.

Summary: Retrieving starting monomers from polymers synthesized by reversible deactivation radical polymerization has been proven effective in increasing recyclability and enabling industrial implementation. A novel method involving the use of Eosin Y under light irradiation has been discovered to trigger faster depolymerization even at lower temperatures. The activation of a macroCTA by Eosin Y results in accelerated macroradical generation, significantly improving current depolymerization approaches.

POLYMER CHEMISTRY (2023)

Article Chemistry, Multidisciplinary

Chemical Recycling of Polymethacrylates Synthesized by RAFT Polymerization

Hyun Suk Wang et al.

CHIMIA (2023)

Review Chemistry, Multidisciplinary

Reversed Controlled Polymerization (RCP): Depolymerization from Well-Defined Polymers to Monomers

Glen R. Jones et al.

Summary: Controlled polymerization methods allow for the precise design and preparation of polymeric materials. Recent work has shown that these methods also enable depolymerization of polymers under mild conditions. This perspective focuses on depolymerization from polymers synthesized by controlled polymerizations, such as radical, ionic, and metathesis polymerizations, and explores concepts to enhance depolymerization.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Article Polymer Science

Fast Bulk Depolymerization of Polymethacrylates by ATRP

Ferdinando De Luca Bossa et al.

Summary: Fast bulk depolymerization of poly(n-butyl methacrylate) and poly(methyl methacrylate) prepared by atom transfer radical polymerization (ATRP) was reported in the temperature range of 150 to 230°C. The depolymerization of Cl-terminated polymethacrylates was catalyzed by a CuCl2/TPMA complex and studied using TGA under isothermal conditions. Rapid depolymerization of 5-20 minutes was observed at 230 and 180°C. Preparative scale reactions achieved up to 84% depolymerization within 15 minutes at 230°C using a short-path distillation setup.

ACS MACRO LETTERS (2023)

Article Polymer Science

Copper(II) Chloride/Tris(2-pyridylmethyl)amine-Catalyzed Depolymerization of Poly(n-butyl methacrylate)

Michael R. Martinez et al.

Summary: In this study, a poly(n-butyl methacrylate) macroinitiator was depolymerized, and high concentrations of monomer were successfully recovered. This method achieved selective monomer recovery through rotary distillation, while also discovering the possibility of alkyl halide decomposition leading to reduced initiation efficiency and increased thermal stability of the polymer.

MACROMOLECULES (2022)

Article Chemistry, Multidisciplinary

Reversing RAFT Polymerization: Near-Quantitative Monomer Generation Via a Catalyst-Free Depolymerization Approach

Hyun Suk Wang et al.

Summary: Researchers reported an efficient, catalyst-free depolymerization method for polymers made by reversible addition-fragmentation chain transfer (RAFT) polymerization, with up to 92% yield. Their approach exploited the high end-group fidelity of RAFT polymers to generate chain-end radicals triggering rapid unzipping, enabling reconstruction of linear polymers or creation of new insoluble gels.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Polymer Science

Depolymerization of Polymethacrylates by Iron ATRP

Michael R. Martinez et al.

Summary: Polymer recycling is gaining increasing attention in the context of a circular economy. This study reports the depolymerization of poly(methyl methacrylate) (PMMA) and poly(n-butyl methacrylate) (PBMA) through controlled radical polymerizations mediated by iron chloride salts and iron powder. The most effective depolymerization was achieved using zerovalent Fe0 as a supplemental activator and reducing agent.

MACROMOLECULES (2022)

Review Chemistry, Multidisciplinary

Degradable and Recyclable Polymers by Reversible Deactivation Radical Polymerization

Michael R. Martinez et al.

Summary: Reversible deactivation radical polymerization (RDRP) provides unprecedented control over polymer composition, size, functionality, and topology. This review outlines the progress in the synthesis of degradable polymers designed by RDRP, organized by topology and synthetic route. Recent progress in the depolymerization of polymers using RDRP mechanisms is highlighted and critically discussed.

CCS CHEMISTRY (2022)

Article Polymer Science

Photoassisted Radical Depolymerization

James B. Young et al.

Summary: Controlled radical polymerization techniques allow for the synthesis of polymers with specific molecular weights and architectures. In this study, the role of light in triggering thermal depolymerization of polymers synthesized through reversible-addition-fragmentation chain-transfer (RAFT) polymerization was investigated. By targeting specific electronic transitions, the depolymerization efficiency was enhanced.

ACS MACRO LETTERS (2022)

Review Chemistry, Multidisciplinary

Atom Transfer Radical Polymerization: A Mechanistic Perspective

Francesca Lorandi et al.

Summary: This article highlights the significance of atom transfer radical polymerization (ATRP) in polymer chemistry and the latest advances in catalyst and reaction conditions design. The critical role of mechanistic studies in understanding and predicting polymerization outcomes is emphasized.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Polymer Science

Investigating the Effect of End-Group, Molecular Weight, and Solvents on the Catalyst-Free Depolymerization of RAFT Polymers: Possibility to Reverse the Polymerization of Heat-Sensitive Polymers

Hyun Suk Wang et al.

Summary: This study successfully achieved efficient depolymerization of various poly(methyl methacrylate) materials made by reversible addition-fragmentation chain-transfer polymerization using different solvents and end groups, selectively regenerating pure heat-sensitive monomers under mild conditions.

ACS MACRO LETTERS (2022)

Article Chemistry, Multidisciplinary

Promoting halogen-bonding catalyzed living radical polymerization through ion-pair strain

Shiwen Huang et al.

Summary: In this study, triaminocyclopropenium (TAC) iodides were used as highly potent catalysts for halogen-bonding catalyzed living radical polymerization. The unique effect of ion-pair strain between the TAC cation and the iodide anion promoted high catalytic efficiency in halogen-bonding catalysis. The TAC iodides showed general applicability and surpassed previously reported organic iodide catalysts. Furthermore, the TAC-iodides also showed promising feasibility in catalyzing radical depolymerization.

CHEMICAL SCIENCE (2022)

Review Chemistry, Multidisciplinary

A comparison of RAFT and ATRP methods for controlled radical polymerization

Nghia P. Truong et al.

Summary: RAFT and ATRP are two commonly used controlled radical polymerization methods that can produce functional polymers with specific properties, but they have slightly different mechanisms and applications.

NATURE REVIEWS CHEMISTRY (2021)

Article Polymer Science

Depolymerization of P(PDMS11MA) Bottlebrushes via Atom Transfer Radical Polymerization with Activator Regeneration

Michael R. Martinez et al.

Summary: This study investigated the catalyzed depolymerization of a Cl-capped poly(poly(dimethylsiloxane) methacrylate) polymer mediated by an atom transfer radical polymerization catalyst at 170 degrees C. The depolymerization yield, rate, and selectivity were improved by increasing the ratio of [TPMA]/[CuCl2]. Electron transfer from the ligand contributed to the Cu(I) activator regeneration at high temperature, as proven by ultraviolet-visible spectroscopy.

MACROMOLECULES (2021)

Article Chemistry, Multidisciplinary

Controlling dispersity in aqueous atom transfer radical polymerization: rapid and quantitative synthesis of one-pot block copolymers

Hyun Suk Wang et al.

Summary: The dispersity of a polymer is a key parameter in material design, and a rapid and quantitative method has been developed to tailor dispersity of polymers in aqueous atom transfer radical polymerization by using excess ligand to regulate the dissociation of bromide ions. This method allows for control over dispersity within a short time frame, high monomer conversions, and maintenance of high end-group fidelity.

CHEMICAL SCIENCE (2021)

Article Chemistry, Multidisciplinary

Tailoring Polymer Dispersity by RAFT Polymerization: A Versatile Approach

Richard Whitfield et al.

Review Chemistry, Multidisciplinary

Recent Developments and Future Challenges in Controlled Radical Polymerization: A 2020 Update

Kostas Parkatzidis et al.

Review Nanoscience & Nanotechnology

Controlling polymer properties through the shape of the molecular-weight distribution

Dillon T. Gentekos et al.

NATURE REVIEWS MATERIALS (2019)

Review Chemistry, Multidisciplinary

Tailoring polymer dispersity and shape of molecular weight distributions: methods and applications

Richard Whitfield et al.

CHEMICAL SCIENCE (2019)

Article Polymer Science

Hydroperoxide Traces in Common Cyclic Ethers as Initiators for Controlled RAFT Polymerizations

Steffen Eggers et al.

MACROMOLECULAR RAPID COMMUNICATIONS (2018)

Review Polymer Science

Sequence-definition from controlled polymerization: the next generation of materials

Jeroen De Neve et al.

POLYMER CHEMISTRY (2018)

Article Multidisciplinary Sciences

Rapid and quantitative one-pot synthesis of sequence-controlled polymers by radical polymerization

Guillaume Gody et al.

NATURE COMMUNICATIONS (2013)

Review Chemistry, Multidisciplinary

Bioapplications of RAFT Polymerization

Cyrille Boyer et al.

CHEMICAL REVIEWS (2009)

Article Engineering, Environmental

Elucidation of the 1,4-dioxane decomposition pathway at discrete ultrasonic frequencies

MA Beckett et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2000)