Article
Polymer Science
Karen Hakobyan, Benjamin B. Noble, Jiangtao Xu
Summary: This article introduces a solid-phase methodology for synthesizing iterative RAFT single unit monomer insertion (SUMI) adducts. The method features a reversible thiocarbonylthio protecting group and radical chain growth of vinyl monomers, requiring minimal purification during the synthesis. By immobilizing the RAFT chain transfer agent on a common peptide synthesis resin, and using an oxygen-tolerant PET-RAFT methodology, the iterative synthesis of indene-maleimide SUMI adducts was extended to 18 units with minimal dispersity, which is unprecedented in SUMI chemistry. Furthermore, the solid-phase methodology can be applied to other maleimide derivatives and other solid-phase resins.
Article
Polymer Science
Stefania Pragliola, Fabia Grisi, Vissia Vitale, Olga Sacco, Vincenzo Venditto, Lorella Izzo, Annalisa Grimaldi, Nicolo Baranzini
Summary: P(P-co-PK) copolymers containing isolated PK units were prepared using a specific catalytic system. These copolymers can be used as fluorescent tags for detecting PP microplastic pollutants in organic tissues and as fluorescent dyes for identifying i-PP during the plastic recycling process.
Article
Chemistry, Multidisciplinary
Panagiotis Bexis, Maria C. Arno, Craig A. Bell, Anthony W. Thomas, Andrew P. Dove
Summary: A biodegradable, hyperbranched polymer based on PCL is obtained through the thermolysis of a precursor molecule containing a carbene end group, allowing for controlled radical polymerization to produce amphiphilic copolymers. These hyperbranched cores can self-assemble into spherical core-shell micelles.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Shan Tang, Yajun Zhao, Kyoko Nozaki
Summary: This study reports a new method to successfully incorporate CO2 into polyethylenes, synthesizing two types of main-chain-functionalized polyethylenes through different copolymerization strategies, providing a new pathway for the preparation of diverse polyethylene materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Izabela Kurowska, Karolina H. Markiewicz, Katarzyna Niemirowicz-Laskowska, Mathias Destarac, Przemyslaw Wielgat, Iwona Misztalewska-Turkowicz, Pawel Misiak, Halina Car, Agnieszka Z. Wilczewska
Summary: This study reports on the formation of drug delivery systems using thermoresponsive block copolymers containing lipid-based segments. Two acrylate monomers derived from palmitic- or oleic-acid-based diacylglycerols were synthesized and polymerized using the RAFT method. The resulting amphiphilic block copolymers formed polymeric nanoparticles, which showed cytocompatibility with normal cells and increased cytotoxicity and apoptosis or necrosis induction in breast cancer cells compared to the free drug.
Article
Engineering, Environmental
Konstantin A. Tereshchenko, Daria A. Shiyan, Nikolai V. Ulitin, Sergei V. Kolesov, Rustam Ya. Deberdeev, Kharlampii E. Kharlampidi
Summary: This article presents the essence of a method for kinetic modeling and CFD calculations of polymer synthesis, which is named as the modified concept of bond blocks. The modified concept simplifies the technical side of CFD calculations and allows for accurate calculations of cationic copolymerization and composite material shrinkage.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Ye Sha, Zhou Zhou, Jiale Zhang, Xiaofan Chen, Zhenyang Luo, Xiang Li
Summary: This study reports the first synthesis of heterobimetallic block copolymers with a combined main-chain/side-chain topology, and reveals the significant modulation of their photophysical, electrochemical, and thermal properties, as well as the ring-opening metathesis polymerization-induced crystallization-driven self-assembly (ROMPI-CDSA) behavior, by switching the metal identity.
CHEMICAL COMMUNICATIONS
(2022)
Article
Polymer Science
Mingtao Zhou, Wanjun Guo, Sen Zhang, Binbin Xu, Weize Jin, Xiaoyu Huang
Summary: In this study, double bond-containing poly(phenoxyallene) (PPOA) copolymers with a tunable structure were successfully prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization. The research demonstrated that the polymerization process had good livingness under the optimized conditions, and the versatility of this approach was shown through the preparation of PPOA homopolymers and diblock copolymers.
Article
Polymer Science
Huina Lin, Luis Ramos, JiHyeon Hwang, Tianyu Zhu, Md Waliullah Hossain, Qi Wang, Sophya Garashchuk, Chuanbing Tang
Summary: Cationic metallopolymers with a complete hydrocarbon framework were synthesized and used as anion-exchange membranes in alkaline fuel cells. These polymers showed high chemical and thermal stability, low swelling, and favorable mechanical properties. They exhibited high hydroxide conductivity and retained 94% of the conductivity after exposure to high alkaline conditions for 45 days. The main-chain hydrocarbon-based polymers were found to have lower water uptake and swelling ratio compared to side-chain cobaltocenium polymer-based AEMs, while maintaining similar ion exchange capacity and hydroxide conductivity.
Article
Polymer Science
James McQuade, Mya I. Serrano, Frieder Jakle
Summary: The incorporation of main group elements into polymers enables the synthesis of functional materials with unique molecular structures and chemical properties. Ring-opening metathesis polymerization (ROMP) is a versatile method for generating new main group element-functionalized materials.
Article
Polymer Science
Toru Ube, Romu Nakayama, Tomiki Ikeda
Summary: Thermoplastic polyurethane with azobenzene moieties was developed for reversible photoactuation and shape programming. The material was characterized for phase transition properties, microstructures, and photoinduced deformation behaviors, demonstrating excellent processability and repeatability.
Article
Chemistry, Multidisciplinary
Xu Chen, Anjun Qin, Ben Zhong Tang
Summary: A regio-selective and atom-economical spontaneous multicomponent polymerization was established, using CS2 as a catalyst to link activated internal alkynes and amine monomers into polymer chains. The resulting polymers exhibited exceptional optical characteristics and good film-forming capabilities, while being synthesized in a green and efficient manner with low energy consumption, minimized waste generation, and efficient use of CS2 resources.
Article
Polymer Science
Xiao Wang, Guixian Wang, Jinghua Zhao, Zhiyuan Zhu, Jingyi Rao
Summary: The researchers developed a series of polysulfoniums with effective activity against planktonic fungi and bacteria, with the optimal composition showing significant reduction in biofilm mass in mature biofilms after 3 days at high concentrations, with over 99% killing rate.
Review
Polymer Science
Jiaxi Xu, Nikos Hadjichristidis
Summary: The incorporation of heteroatom-containing weak bonds along polymer backbones has become a popular tool to accelerate degradation. Many methods have been reported for the synthesis of degradable heteroatom-containing polymers based on step-growth polymerization and chain-growth ring-opening polymerization. Ring-opening metathesis polymerization has emerged as an approach for the synthesis of various types of degradable polymers. This review covers the synthesis of different heteroatom-containing degradable polymers via ring-opening metathesis polymerization and their degradation mechanisms under different conditions.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Polymer Science
Alexander Schmitt, Negar Kazerouni, Grace E. Castillo, Barry C. Thompson
Summary: We synthesized a series of block copolymers with nonconjugated pendant electroactive polymer (PCzETPMA) and polystyrene (PS) block through an anionic living polymerization. By controlling the molar masses, PS to PCzETPMA block ratios, and tacticities of the PCzETPMA blocks, we were able to increase the hole mobilities of the resulting copolymers. The highest hole mobility achieved was 2.33 x 10(-5) cm(2)/V center dot s for the copolymer with the highest molar mass and dominant isotactic PCzETPMA block.
