Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
A joint experimental/theoretical study has been carried out on the putative MMA polymerization catalyzed by an yttrium isopropyloxide complex. Despite its high activity in lactone polymerization, this catalyst is found to be unreactive on methyl methacrylate (MMA) polymerization. This surprising result is rationalized using a computational approach at the DFT level. Indeed, the endothermicity of the initiation step explains this lack of reactivity. The theoretical proposal of yttrium amido complexes as catalysts allows overcoming this initiation problem.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c3dt00039g | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Improvement of dentin bonding via adhesive monomers with multiple hydrogen bonding moieties.
Acta Biomater
September 2025
Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI 48824, USA. Electronic address:
Despite advancements in bonding techniques, the resin-dentin interface remains the weakest point in dental restorations, susceptible to collagen degradation and methacrylate hydrolysis. One strategy to enhance the resin-dentin interface is to incorporate hydrogen-bonding-rich functional groups into dental adhesive resins, such as 2-ureido-4[1H]-pyrimidinone (UPy). These hydrogen bonds may bridge the adhesive resin and dentin substrate, which contains collagen and hydroxyapatite, as well as form non-covalent crosslinks within the resin.
View Article and Find Full Text PDFPhotodegradation Behavior of Nanosilica-Filled PMMA Composite: Cooperative Effect of Mixed Solvents and Interfacial Functional Groups.
Polymers (Basel)
August 2025
Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Poly(methyl methacrylate) (PMMA) and its composites are widely used in industrial applications; therefore, their durability is of great concern. In this study, the photooxidative degradation behavior of nanosilica-filled PMMA composite films and the cooperative effect of mixed solvents containing tetrahydrofuran (THF) and chloroform (TCM), as well as interfacial functional groups, was investigated. The surface functional groups of nanosilica fillers, such as polar, aryl, and alkyl moieties, significantly affect the photodegradation kinetics and pathways for PMMA.
View Article and Find Full Text PDFThe Mechanism and Kinetics of Hydroxyl Radical Polymerization of Nonionized Acrylic Acid and Its Derivatives in Aqueous Solution.
J Phys Chem A
August 2025
The University of Danang - University of Technology and Education, Danang 550000, Vietnam.
In the free-radical polymerization of acrylic acid derivatives (), including acrylic acid (), methyl acrylate (), acrylamide (), methacrylic acid (), and methyl methacrylate (), initiation and propagation occur via radical addition to . Although extensive experimental data exist about this industrial process, many mechanistic aspects of the reactions themselves remain unclear, largely because of the challenge that the characterization of reaction mechanisms poses to experimental methodology. Computational methods offer an alternative avenue to deliver fast and accurate results on the mechanistic details, as evidenced by various theoretical studies in the literature.
View Article and Find Full Text PDF3D printable PCL--P(MMA--TMSPMA)/silica hybrids using a PCL RAFT agent.
J Mater Chem B
August 2025
Department of Materials, Imperial College London, SW7 2AZ, London, UK.
Inorganic/organic hybrid biomaterials have the potential to combine the benefits of bioactive glasses, such as bone bonding and osteogenesis, with the ability to withstand cyclic loading. Here, we report on silica/poly(ε-caprolactone-methacrylate) hybrids, using hydroxy monofunctional-PCL as a reversible addition-fragmentation chain transfer (RAFT) agent, for controlled polymerization of PCL--P(methyl methacrylate--3-(trimethoxysilyl)propyl methacrylate), PCL--P(MMA--TMSPMA), block copolymers by a combination of ring opening polymerization (ROP) and RAFT polymerization techniques. The new polymer was used for the preparation of hybrids the sol-gel method, with TMSPMA providing covalent bonds between the silica and PCL--P(MMA--TMSPMA).
View Article and Find Full Text PDFNanoscale Miscibility in In Situ Polymerized Hybrid Electrolytes Speeds Up Ion Dynamics and Enables Stable Cycling of Li Metal Batteries.
ACS Nano
September 2025
Electrification and Energy Infrastructures Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
While the potential use of copolymerized electrolytes in Li metal batteries is subject to intense investigation, the fundamental understanding of the nanoscale domain formation and its effect on Li transport is still lacking. In this study, we investigated the correlation between the Li transport mechanism and the miscibility of monomers in polymer blend electrolytes derived from the in situ copolymerization of methyl methacrylate (MMA) and vinylene carbonate (VC) in the presence of polyethylene glycol dimethyl ether (PEGDME) plasticizer and bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. The addition of a polar short chain plasticizer reduced the dynamic and structural heterogeneities of the electrolyte.
View Article and Find Full Text PDF