Article
Materials Science, Multidisciplinary
Puja Das Karmakar, Aniruddha Pal, Subhadip Bodhak, Sagar Pal
Summary: The study synthesized nanocomposites consisting of magneto-responsive gamma-Fe2O3 NPs and copolymers, with a regular core-shell morphology where the magnetic NPs act as the core and the copolymer as the shell. This developed nanocarrier has been found to be highly efficient in carrying a hydrophobic drug (naproxen).
ACS APPLIED POLYMER MATERIALS
(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
Chengqiang Ding, Yuhan Yan, Yuhao Peng, Danming Wu, Hang Shen, Jiandong Zhang, Zhao Wang, Zhengbiao Zhang
Summary: In this study, a well-controlled piezoelectrically mediated reversible addition-fragmentation chain-transfer polymerization (piezoRAFT) was successfully conducted using piezoelectric ZnO nanoparticles as the mechanochemical transducer under ultrasonic agitation. The resulting polymer exhibited high end-group fidelity, low dispersity, and capacity for chain extension. The generation of alkyl radicals through electron transfer process from piezoelectric nanoparticles to alkyl bromide was confirmed by various characterization techniques.
Article
Nanoscience & Nanotechnology
Sarthik Samanta, Sovan Lal Banerjee, Koushik Bhattacharya, Nikhil K. Singha
Summary: A new waterborne epoxy-based fluorescent adhesive, synthesized via surfactant-free miniemulsion polymerization and decorated with graphene quantum dots, shows transparency, easy detection, and excellent adhesion strength. The addition of GQDs enhances the adhesive performance, making it a promising contrivance for art conservators in repairing or reconstructing artifacts.
ACS APPLIED MATERIALS & INTERFACES
(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
Nanoscience & Nanotechnology
Derek H. H. Chan, Emily L. Kynaston, Christopher Lindsay, Philip Taylor, Steven P. Armes
Summary: Well-defined sterically stabilized diblock copolymer nanoparticles of 29 nm diameter were prepared as a dispersant for organic crystalline microparticles. These nanoparticles effectively adsorbed onto the surface of azoxystrobin microparticles, reducing the negative zeta potential exhibited by azoxystrobin.
ACS APPLIED MATERIALS & INTERFACES
(2021)
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
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
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.
Review
Polymer Science
Bing Niu, Ying Chen, Li Zhang, Jianbo Tan
Summary: Organic-inorganic hybrid nanomaterials are important functional materials prepared through cooperative self-assembly and polymerization-induced self-assembly (PISA). The conventional method of cooperative self-assembly encounters problems with low solids contents and multi-step processes, while PISA enables the preparation of concentrated block copolymer nanomaterials. This review focuses on recent developments in preparing organic-inorganic hybrid nanomaterials via PISA.
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
Chemistry, Physical
Yu-Xi Wang, Yang Li, Shi-Hui Qiao, Jing Kang, Zhi-Li Shen, Ning-Ning Zhang, Zesheng An, Xiaosong Wang, Kun Liu
Summary: A staged-thermal-initiation RAFT polymerization method is reported for the synthesis of polymers with high thiol end-group fidelity, which show high efficiencies for grafting to various gold nanoparticles (GNPs). Experimental proof shows that the decrease of end-group fidelity with molecular weight is caused by the gradual decomposition of the initiator. The positive correlation between end-group fidelity of polymers and grafting-to efficiency is illustrated through grafting-to assays for various GNPs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Kalipada Manna, Priyapratim Patra, Arpita Roy, Rakesh Kumar Roy, Krishna Chaitanya Sunka, Santanu Dhara, Niladri Patra, Sagar Pal
Summary: Biopolymeric micelles derived from bioinspired amphiphilic polymers have attracted attention as carriers for hydrophobic drugs. In this study, a hydrophobic monomer was synthesized and grafted onto a hydrophilic polymer backbone to obtain an amphiphilic copolymer. The copolymer showed controlled polymerization and pH-responsive reversible micellization behavior. The micelle formed from the copolymer was able to uptake and release a hydrophobic drug in a controlled manner.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jun He, Ying Chen, Li Zhang, Jianbo Tan
Summary: In this study, stimulus-responsive vesicles are prepared by photoinitiated RAFT seeded emulsion polymerization. The obtained vesicles can transform into different shapes and be used for controlled release of cargos in the presence of reactive oxygen species.
CHINESE CHEMICAL LETTERS
(2023)
Article
Polymer Science
Kazunori Masuko, Chiharu Kumano, Ryo Sugawara, Kazuhiro Nakabayashi, Hideharu Mori
Summary: A variety of amino-acid-based amphiphilic diblock copolymer nano-objects with different morphologies were prepared through RAFT dispersion polymerization of styrene in methanol, utilizing six different hydrophilic poly(N-acryloyl amino acid) macro-chain transfer agents. The effects of polymerization conditions, monomer conversion, and concentration were systematically studied to achieve the formation of nano-objects with various morphologies. By transforming the products from methanol to water, pH-responsive morphological changes were observed in the aqueous solution.
JOURNAL OF POLYMER SCIENCE
(2021)
