Reactive and Functional Polymers, Journal Year: 2024, Volume and Issue: 202, P. 105997 - 105997
Published: June 22, 2024
Language: Английский
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 8, 2025
The shape transformation of polymer vesicles is great importance for biorelevant applications as well understanding cellular adaptation. However, realizing in a controlled manner by rationally manipulating the molecular geometry building block still challenging. Herein, we reported contraction process individual via realignment bottlebrush segments using linear-alt-bottlebrush alternating multiblock copolymer (LBAMBCP) block. well-defined LBAMBCPs, A50[(xbB)mA50]n (x = 1 and 3 refer to grafting density, m 10, 20, 30, n 1, 3, 5), that consisted xbB segment with varied densities (x) PS branches A linear poly[norbornene-oligopoly(ethylene glycol)] (poly(NB-OEG)) were first synthesized. To perform self-assembly selective solvent poly(NB-OEG) segments, found these LBAMBCPs high density 3) promoted formation vesicular structures, typical hollow an average size over 600 nm produced. It was observed formed 7- 11-LBAMBCPs A50[(3bB)10A50]n (n 5) could further undergo evolve into compound steady reduction vesicle wall. confirmed be strongly related number simply regulated changing initial concentration composition. Overall, provide fresh case blocks.
Language: Английский
Citations
1
Macromolecules, Journal Year: 2024, Volume and Issue: 57(7), P. 3173 - 3182
Published: March 26, 2024
The combination of ring-opening metathesis polymerization (ROMP) and the arm-first strategy is a widely employed "one-pot two-batch" approach for synthesizing star polymers. However, intramolecular cross-linking during core formation in homogeneous system significantly restricts production high-molar-mass polymers with complete conversion arms. In this study, we present successful synthesis diverse chemical compositions high molar mass using monomer emulsified ROMP (ME-ROMP) based on strategy. ME-ROMP method involves sequentially injecting CH2Cl2 solution containing G3 catalyst hydrophobic cross-linker into aqueous norbornene monomers under stirring. Benefiting from confinement effect provided by ME-ROMP, intermolecular was greatly enhanced, resulting well-defined varied up to 95% arms within minutes. Furthermore, cationic copolymer exhibited low toxicity demonstrated potential applications inflammation inhibition.
Language: Английский
Citations
7
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 3, 2025
Polymer nanoparticles with low curvature, especially two-dimensional (2D) soft materials, are rich in functions and outstanding properties have received extensive attention. Crystallization-driven self-assembly (CDSA) of linear semicrystalline block copolymers is currently a common method constructing 2D platelets uniform size. Although accompanied by high controllability, this CDSA usually inevitably requires longer aging time lower assembly concentration, limiting the large-scale preparation nanoaggregates. In study, series all-bottlebrush-type copolymers, poly(octadecyl acrylate)-block-poly(oligoethylene glycol methyl ether methacrylate)s prepared living polymerization. Driven synergistic crystallization crystalline side chains rapid microphase separation bottlebrush topology, these polymers can assemble into circular platelet micelles few minutes, without being affected concentration. process, epitaxial growth molecules proceeds rigid cylindrical molecular conformation at micelle sites eventually provides sandwich-type according to head-to-head stacking mode. This explained as "crystallization-assisted separation" mechanism. The structures solvent temperature, size which shows dependence on temperature below melting point block, be used precisely control morphology platelets. study establishes an efficient prepare polymer nanosoft promising candidates for further development, preparation, application various nanomaterials.
Language: Английский
Citations
0
Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 18, 2025
Comprehensive Summary Dendronized polymers (DenPols) with tunable shape and surface property have been recognized as a type of promising unimolecular nanomaterials. However, it still has lacked rapid efficient approach to the facile synthesis DenPols high‐generation well‐defined structures. Herein, we report “ m+n” grafting‐onto strategy combined copper‐catalyzed azide‐alkyne cycloaddition (CuAAC) reaction reaction‐enhanced reactivity intermediates (RERI) mechanism for synthesizing G m + n by attaching ‐generation dendrons (G ) onto . In this m+n ” strategy, ( = 1, 2) bearing 1,3‐triazido branches on repeating unit were capable RERI effect that guaranteed CuAAC in an extremely way ultrafast kinetics synthesize third‐, fourth‐ fifth‐generation 1+2 , 1+3 1+4 2+2 2+3 near quantitative grafting density narrow distribution. Moreover, these resultant had more terminal groups per due three structure, exhibiting valuable potential opportunities molecular engineering. The development not only presents new avenue preparing but also holds great promise materials functional groups.
Language: Английский
Citations
0
Macromolecules, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 30, 2025
The variations of side-chain architecture can significantly affect the thermoresponsive behaviors graft polymers. This study is aimed at designing linear polymers with or cyclic pendants (LGPLs/LGPCs) to elucidate distinct thermostability polymer solutions. Three pairs poly(N-isopropylacrylamide) (PNIPAM)-bearing a weight-average number (Ng) up 16 are synthesized by combination ring-first method, fractionation, and topology transformation. chain thermosensitivity aqueous solutions, in which thermo-induced maximal transmittance, light scattering intensity, fluorescence intensity ratio related amide–water hydrogen bonding drastically decrease incorporation an increase Ng. LGPLs pronounced entanglement self-assemble into thermostable lamellae, while other assemblies subjected sphere-to-vesicle vesicle-to-lamella transitions. research affords promising method construct variable architectural parameters achieve topology-dependent behaviors.
Language: Английский
Citations
0
Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown
Published: May 4, 2025
Abstract Bottlebrush polymers (BBPs) have emerged as a special class of macromolecules composed linear backbone the main chain with densely grafted polymeric side chains. BBPs present many unique properties, such low entanglement, high extension backbone, and extremely plateau shear moduli relative to their analogs due distinct conformational topological characteristics. This review summarizes recent significant advances BBPs, from synthetic methods versatile properties applications in areas super‐soft elastomers, photonic crystals, self‐assembly, friction, biomimetic tissues, bio‐interfacial interactions enhance cell penetration anti‐fouling performance, drug delivery, other emerging (polymer electrolyte, catalyst support, covalent adaptable networks). Meanwhile, molecular dynamic simulations are discussed tool disclose relationship between structures properties. will comprehensively summarize studies on point out direction give prediction application trend, comment future BBPs.
Language: Английский
Citations
0
Journal of Polymer Science, Journal Year: 2024, Volume and Issue: 62(21), P. 4835 - 4850
Published: April 23, 2024
Abstract Molecular bottlebrush (MBB) has been considered as an important type of unimolecular nanomaterial for widespread applications ranging from energy to biomedicine, due its typical one‐dimensional molecular conformation with tunable aspect ratio and chemical composition. In the recently decades, ring‐opening metathesis polymerization (ROMP) combined grafting‐through strategy emerged a powerful tool synthesizing MBBs various architecture, including (multi)block MBBs, core‐shell random Janus et al. this review, recent advances on synthesis rational preparation NB terminated macromonomers (MMs) ROMP are briefly summarized. Moreover, emerging progress performed in aqueous media is also highlighted.
Language: Английский
Citations
3
Macromolecules, Journal Year: 2023, Volume and Issue: 57(1), P. 191 - 200
Published: Dec. 19, 2023
Aqueous poly(sulfobetaine methacrylate) (PSBMA) solutions exhibit upper critical solution temperature (UCST) behaviors, which are influenced by the topological structure and relative molar mass of polymer chain. In this study, a series well-defined PSBMA-based zwitterionic bottlebrush poly(l-methionine) derivatives, namely, poly(l-methionine-g-(PSBMA)m) (MS-m), were synthesized via ring-opening polymerization l-methionine N-carboxyanhydride, followed bromo-alkylation atom transfer radical polymerization. The aqueous MS-70 (m = 70) showed UCST-type thermoresponsive properties with cloud point (Tcp) at around 38.6 °C. variable nuclear magnetic resonance results 1H 2D 1H–1H correlated spectroscopy Overhauser effect (NOESY) demonstrated peaks coupling interactions between protons in sulfobetaine units. When increased up to or beyond Tcp, NOESY spectra that polypeptides transformed from aggregated state monodisperse owing weakened inter/intramolecular positively negatively charged groups. contrast, observed UCST transition near physiological temperatures could be negligible linear PSBMA linear-like SBMA degraded papain. Results indicated activated zwitterions. brief, study presents precise strategy for synthesizing an elucidated mechanism thermal responsiveness solution. It provides valuable insights into expanding applications zwitterions biology, such as protein stabilization hydrogels.
Language: Английский
Citations
7
Journal of Polymer Science, Journal Year: 2024, Volume and Issue: 62(13), P. 3038 - 3046
Published: April 24, 2024
Abstract Ring opening metathesis polymerization (ROMP) is widely used to prepare functional materials with various topological structures. However, it difficult polymers ultra‐high molecular weight (UHMW) directly. We found a new method UHMW by combining ROMP and acyclic reaction. First, monomer NB‐2OH was polymerized different feed ratio of NB‐2OH/G3, obtained well‐defined P(NB‐2OH) n ( = 50, 200, 463). Then reaction synthesize polymers. The results indicated that polymer z higher M w 6067.3 kg mol −1 ) narrower distribution (PDI 1.58) could be at 80°C for 5 min, when 463 as raw material H 2 SO 4 /G3 10/1. Compared P(NB‐2OH)1990 5343.1 , PDI 1.61) prepared directly, the tremendously shortens time, lowers requirement purity produces distribution. compositions were also confirmed clearly post‐modification 1 NMR characterization.
Language: Английский
Citations
2
Reactive and Functional Polymers, Journal Year: 2024, Volume and Issue: 202, P. 105997 - 105997
Published: June 22, 2024
Language: Английский
Citations
1