1、Stereospecific cationic RAFT polymerization of bulky vinyl ethers and
Here, we propose a new approach for stereospecific living cationic polymerization by combining cationic reversible addition-fragmentation chain transfer (RAFT) polymerization with thiocarbonylthio compounds and stereospecific cationic polymerization of bulky vinyl ethers with Lewis acid catalysts.
2、Poly[di(ethylene glycol) vinyl ether]
RAFT aqueous emulsion polymerization owes its success to recent RAFT polymerizations of hydroxy-functionalized vinyl ethers. We investigated the RAFT polymerization of DEGV, analyzed the...
3、Synthesis and characterization of novel vinyl ethers that bear various
259 mol) and ethyl vinyl ether (2.92 g, 0.041 mol) that were dissolved in 2.5 ml of THF. The 260 solution was then added to the catalytic solution that was prepared by palladium (II) acetate 261 (0.038 mg, 1.70*10-4 mol) and 1,10-phenanthroline (0.045 mg, 2.55*10-4 mol)
Recent Developments on Cationic Polymerization of Vinyl Ethers
There have been numerous notable developments in cationic polymerization of vinyl ethers in recent years with the establishment of cationic RAFT polymerization. Several organic catalyst systems have emerged as viable alternatives to the metal-based Lewis acid catalysts.
Synthesis and Degradation of Vinyl Polymers with Evenly Distributed
Various vinyl ethers with hydrophobic, hydrophilic, and functional pendants are available. Finally, one-pot synthesis of multiblock copolymers and their degradation into diblock copolymers are also achieved.
Recent advances in applications of vinyl ether monomers for precise
In this review, we do not intend surveying the mechanistic details, rather we give a scope of the most recent and relevant examples of VE involvement in different polymerization protocols.
The Reactions of Vinyl Acetate with Aliphatic Hydroxy Compounds. A New
An efficient method to synthesize vinyl ethers (VEs) that bear various halogenated or functional groups and their radical copolymerization with chlorotrifluoroethylene (CTFE) to yield functional poly (VE-alt-CTFE) alternated copolymers.
Synthesis of degradable polymers via 1,5
We report a novel method for synthesizing degradable polymers based on 1,5-shift radical isomerization polymerizations of vinyl ethers with transferable atoms or groups and in-between...
Catalyst
This approach overrides conventional chain-end stereochemical bias to achieve catalyst-controlled stereoselective polymerization. We demonstrate that this method is general to vinyl ether substrates, providing access to a range of isotactic poly (vinyl ether)s with high degrees of isotacticity.
Catalytic Transfer Vinylation of Alcohols
This review focuses on summarising the studies on transition metal catalysed transfer vinylation of alcohols using vinyl ethers and vinyl acetate as vinylating agents. Mercury, palladium, iridium and gold catalysts are discussed herein.
In the vast realm of chemistry, vinyl ethers and vinyl acetate have become focal points of research and application due to their unique chemical properties and widespread uses. These compounds not only play critical roles in industrial production but also demonstrate immense potential in the development of new materials, environmental protection, and healthcare sectors.
Vinyl Ethers are polymers synthesized through the addition polymerization of ethylene and ethylene oxide (EO). Ethylene oxide, an organic compound containing a three-membered ring with two carbon-oxygen single bonds, imparts distinctive physical and chemical characteristics to vinyl ethers. Their molecular chains feature both polar groups (e.g., hydroxyl, amino) and nonpolar groups (e.g., carbon atoms), endowing them with diverse properties in solubility, viscosity, and stability.
In industrial applications, vinyl ethers are widely utilized in coatings, adhesives, sealants, and foam plastics due to their excellent solubility and chemical stability. For instance, when used as adhesives, vinyl ethers can be blended with various resins to create high-strength, high-adhesion formulations for bonding wood, metals, ceramics, and other materials. As raw materials for foam products, they produce elastic and cushioning materials employed in packaging and shock absorption.
Vinyl Acetate, also known as ethyl acetate, is a common organic synthesis intermediate prevalent in petrochemical products. Its molecular structure, resembling that of vinegar, justifies its name. Primarily used to produce poly(vinyl acetate) (PVAc), a vital polymer material, vinyl acetate enables applications such as paper coating, textile printing, leather treatment, and cosmetics due to PVAc’s film-forming ability, flexibility, and water resistance. Additionally, vinyl acetate undergoes transesterification reactions to yield compounds like methyl acrylate, expanding its utility in chemical industries.
From an environmental perspective, the use of vinyl ethers and vinyl acetate as precursors for plastics and rubbers raises concerns about water pollution and greenhouse gas emissions. Developing eco-friendly production methods and recycling technologies to mitigate their environmental impact represents a key research direction.
In healthcare, these compounds also showcase unique value. Vinyl ethers serve as drug carrier materials, enhancing drug stability and bioavailability. Vinyl acetate, through esterification reactions, can be converted into antimicrobial or antiviral agents, fostering innovation in biomedical materials.
The study and application of vinyl ethers and vinyl acetate remain dynamic fields. As science advances and societal needs evolve, their future appears increasingly promising. In-depth research into these compounds not only optimizes resource utilization but also offers novel approaches to addressing global challenges.
