Article
Polymer Science
Arne Wolpers, Florian Baffie, Vincent Monteil, Franck D'Agosto
Summary: In this study, a dithiocarbamate chain transfer agent was used to synthesize statistical and diblock copolymers of ethylene and vinyl acetate, achieving various polymer compositions through good chain growth control, including linear diblock copolymers and a three-arm star copolymer.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Joji Tanaka, Noel Edward Archer, Michael Jeffery Grant, Wei You
Summary: In this study, RAFT step-growth polymerization was achieved by combining RAFT and step-growth polymerization mechanisms, resulting in backbone repeat units with a pendant RAFT agent that can form molecular brush polymers in a second polymerization step. The cleavable backbone functionality allows the transformation of brushlike polymers into linear chains of uniform size under stimuli.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Polymer Science
Jungyeon Kim, Beatrice Cattoz, Alice H. M. Leung, James D. Parish, C. Remzi Becer
Summary: The synthesis of a new 2-oxazoline monomer and its application in RAFT polymerization are reported in this study. Brush copolymers with different architectures were prepared by adjusting the monomer ratios.
Article
Polymer Science
Wenling Guo, Peng Cao, Fengli Dai, Yonggang Li, Rongmin Wang, Pengfei Song, Yufeng He
Summary: The novel antibacterial material, polymer cations-adjustable porous materials (PCaPM), was synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT) and quaternization. PCaPM showed excellent antibacterial activity due to the presence of quaternary ammonium salts groups and had great prospects in various applications.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Polymer Science
Parker T. Boeck, Noel E. Archer, Joji Tanaka, Wei You
Summary: Commercially available N-aromatic substituted bismaleimides were used in RAFT step-growth polymerization with a bifunctional RAFT agent, resulting in polymers with moderate to high molecular weights. This advancement allows for the preparation of graft copolymers in a straightforward manner at a larger scale, increasing the accessibility of the previously reported methodology.
Article
Biochemistry & Molecular Biology
Elena Yu. Kozhunova, Anna V. Plutalova, Andrey V. Sybachin, Alexander V. Chertovich, Elena V. Chernikova
Summary: This study investigated the double stimuli-responsive properties of PNIPA and PVIM block copolymers in aqueous solutions for the first time. The synthesis of two different block copolymers was performed using RAFT polymerization. The conformational behavior and self-assembly ability of the polymers were found to depend on the location of hydrophobic groups derived from the RAFT agent within the chain, as well as the length and charge of the PVIM block.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Egor Polozov, Alexandra Grigoreva, Artem Vlasov, Sergey Zaitsev
Summary: The article discusses the application of 1-cyano-1-methylethylmethyl(4-pyridinyl)dithiocarbamate in reversible addition-fragmentation chain transfer (RAFT) polymerization of various monomers, showing good control over some monomers but slightly worse control over others. Polymers with narrow molecular weight distributions were obtained with this RAFT agent.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Dimitrios Selianitis, Stergios Pispas
Summary: This work introduces a series of novel multi-responsive hyperbranched copolymers which self-organize in aqueous media. The copolymers, prepared by RAFT polymerization, exhibit responsiveness to changes in solution temperature and pH, and are able to encapsulate hydrophobic drugs like curcumin. These hyperbranched copolymers show potential as candidates for drug delivery and bio-imaging applications, as they demonstrate stability in the presence of serum proteins.
Article
Polymer Science
Glenn K. K. Clothier, Thiago R. Guimaraes, Graeme Moad, Per B. Zetterlund
Summary: The study investigates the synthesis of multiblock copolymers using seeded RAFT emulsion polymerization and how experimental conditions affect the control over molecular weight distribution (MWD). It was found that high T-g values of polymer particles lead to reduced control over MWD via the RAFT mechanism.
Article
Polymer Science
Patrizia P. Smith, Stephen G. Boyes
Summary: Amphiphilic block copolymers were successfully synthesized using a dual initiator chain transfer agent. Comprehensive kinetics studies provided valuable insights into factors influencing the synthesis of well-defined block copolymers, as well as the ability to produce poly(lactide) blocks of different molecular weights. The role of the chain transfer agent in facilitating the complex and sterically demanding RAFT polymerization of PEGEEMA was also examined through kinetics monitoring.
JOURNAL OF POLYMER SCIENCE
(2021)
Article
Polymer Science
Yuejia Zhu, Luoyu Gao, Zhenjiang Li, Bo Liu, Zhihao Zhang, Haoying Tong, Yuanyuan Qu, Yusheng Quan, Xin Zou, Kai Guo
Summary: An innovative strategy using a bifunctional reversible addition-fragmentation chain transfer (RAFT) agent was proposed to copolymerize four distinct types of monomers (ABCD) in one pot, achieving the synthesis of tetrablock quaterpolymers. By sequentially feeding monomers and utilizing dual-switch mechanisms, the study successfully combined cRAFT, rRAFT, and ROPs for the rational design and precise synthesis of multiblock copolymers with advanced architectures and functionalities.
Article
Polymer Science
Rui Liu, Zhuolin Rong, Guang Han, Xinlin Yang, Wangqing Zhang
Summary: The star multiple block copolymer s-P4VP-b-PS was synthesized and its self-assembly behavior in two selective solvents, methanol and toluene, was investigated. Significant differences were observed between s-P4VP-b-PS and linear block copolymer l-P4VP-b-PS in terms of self-assembly structures in different solvents.
Article
Polymer Science
Zhongyuan Wan, Lee Wai Hin, Ataulla Shegiwal, David Haddleton
Summary: An addition-fragmentation monomer (AFM) is utilized in 3D printer resins to reduce shrinkage during polymerization. The AFM enables reversible network formation and improves mechanical performance. The AFM is synthesized via catalytic chain transfer polymerization (CCTP) and characterized using NMR and size exclusion chromatography (SEC). The incorporation of AFM as a crosslinker allows for rapid reversible covalent bond formation and reduces both polymerization shrinkage and stress buildup.
EUROPEAN POLYMER JOURNAL
(2023)
Review
Polymer Science
Cyrille Boyer, Masami Kamigaito, Kotaro Satoh, Graeme Moad
Summary: This article surveys the progress in the development of radical-promoted single-unit monomer insertion (SUMI) or reversible deactivation radical addition (RDRA) processes, with a focus on aminoxyl-[nitroxide-] mediated SUMI (NM-SUMI), reversible-addition-fragmentation chain transfer-SUMI (RAFT-SUMI), and atom-transfer radical addition (ATRA). The strategies for achieving selectivity in single unit insertion vs oligomerization and the progress towards discrete oligomer synthesis by consecutive SUMI reactions are discussed. The prospects of using radical-promoted SUMI in the synthesis of sequence-defined polymers are also examined.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Polymer Science
James B. Young, Jared Bowman, Cabell B. Eades, Alexander J. Wong, Brent S. Sumerlin
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.
Article
Chemistry, Applied
Xiaodan Wu, Zihan Wang, Guansong Shao, Bingyang Qin, Ying Wang, Tao Wang, Zhiguo Liu, Yujie Fu
Summary: In this study, a new type of cellulose-based ionic imprinting adsorbent was developed for the selective removal of cobalt ions. The adsorbent exhibited excellent adsorption performance, high cycling stability, and preferential selectivity for cobalt ions. The simple preparation method and promising application prospects make it a promising candidate for water treatment.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Chandirasekar Shanmugam, Vanitha Marimuthu, Nagappan Rajendiran
Summary: In this study, monodispersed gold and silver nanoparticles were synthesized using cholic acid functionalized star poly(DL-lactide) as a capping and reducing agent. The synthesized materials were found to be effective heterogeneous catalysts for the reduction reaction.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Bianca-Iulia Ciubotaru, Mirela-Fernanda Zaltariov, Mihaela Dascalu, Adrian Bele, Alexandra Bargan, Maria Cazacu
Summary: Porous networks were obtained using polysiloxanes pendant functionalized with aminopropyl groups. The addition of certain substances, such as ammonium bicarbonate and acetic acid, promoted the porosity and covalent cross-linking of the polymer. The resulting materials exhibited high dielectric permittivity and significant electrical output signal when subjected to compression, making them suitable for capacitive pressure sensors.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Mohamed A. Zein, Basim H. Asghar, Abdulaziz M. Almohyawi, Norah F. Alqahtani, Ahmed Alharbi, J. Alkabli, Reda F. M. Elshaarawy, Lamia A. Ismail
Summary: In this study, new amphiphilic chitosan-thyme extract-nanosilver nanocomposites were prepared, which synergistically inhibited bacterial biofilm formation and bacterial proliferation. The nanocomposites disrupted bacterial cell membranes, causing cell death, and prevented biofilm formation. In addition, the nanocomposites exhibited good biocompatibility, making them potential candidates for biomedical applications.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Review
Chemistry, Applied
Norah F. Alqahtani
Summary: This review explores the potential of Imidazolium-based ionic liquids (ImILs) in improving the solubility, stability, and functionality of chitosan, and provides an overview of the types and preparation methods of functionalized imidazolium ionic liquids (FImILs). Additionally, it discusses the various opportunities offered by FImIL-chitosan derivatives.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Olesya N. Zabegaeva, Alexey F. Kosolapov, Sergei L. Semjonov, Mariam G. Ezernitskaya, Egor S. Afanasyev, Ivan A. Godovikov, Alexander Chuchalov, Dmitriy A. Sapozhnikov
Summary: Polyimides are commonly used as primary protective coatings for optical fibers in high-temperature applications. However, the manufacturing process is complicated due to certain drawbacks. This study shows the potential use of polyamide-imides as highly reliable protective coatings for optical fibers.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Luis Miguel Nunez Tapia, Pascal Thebault, Laurent Bischoff, Alain Ledoux, Florian Defontaine, Olivier Lesouhaitier, Fabrice Burel
Summary: A water soluble cationic bis-cyclocarbonate was prepared through a three steps procedure, and non-isocyanate polyurethanes were prepared in acetonitrile with high yields. The resulting materials exhibited good thermal properties and hydrophilic properties. The polyurethane thermoset showed high inhibition towards bacteria, and the bis-cyclocarbonate oligomer was found to be harmless to organisms.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
