1、Controlled synthesis of poly(vinyl alcohol)

Free radical polymerization has three main steps and occurs when the reacting monomers contain double bonds. First, free radicals are produced which is called the initiation step. Then, new free radicals are formed in the propagation step.

2、Interplay of Head, Tail, and Mid

After a successful model validation of the experimental literature data, the model is applied to understand the complex interplay of the radical types involved and to highlight the control of the branching and unsaturation amounts under RAFT polymerization conditions.

3、Synthesis, characterization, degradation and applications of vinyl

Our recent studies on the synthesis, characterization, degradation and applications of vinyl polyperoxides are reviewed.

4、Polyvinyl acetate (PVAc)

Polyvinyl acetate, a synthetic resin prepared by the polymerization of vinyl acetate. In its most important application, polyvinyl acetate serves as the film-forming ingredient in water-based (latex) paints; it is also used in adhesives. Learn more about polyvinyl acetate in this article.

5、Analytical Steady‐State Model for the Free Radical Solution

Analytical Steady-State Model for the Free Radical Solution Copolymerization of Acrylonitrile and Vinyl Acetate and Their Charge-Transfer Complex in a Continuous Stirred Tank Reactor

Free Radical Polymerization of vinyl acetate

For example, attempts to polymerize styrene and vinyl acetate result in copolymers containing only 1 to 2% of vinyl acetate, whereas a small quantity of styrene will tend to inhibit the free-radical polymerization of vinyl acetate.

Probing the reaction kinetics of vinyl acetate free radical

Vinyl acetate (VAc) is a highly important monomer and its polymers are used in applications ranging from adhesives, paints, and concrete additives to pharmaceuticals. Since vinyl alcohol itself is not stable and undergoes a rapid rearrangement to acetic aldehyde, poly (vinyl acetate) is an advantageous precursor to poly (vinyl alcohol) (PVAL).

Controlled free radical polymerization of vinyl acetate with cobalt

The polymerization of vinyl acetate with the complex catalyst of cobalt acetoacetonate [Co (acac) 2] and DMF ligand with benzoyl peroxide initiator has been successfully carried out in bulk and in solution.

Complex polymer architectures through free

In this Review, we highlight some of the contemporary experimental strategies to prepare complex polymer architectures using radical polymerization of multivinyl monomers. We also examine the...

Free Radical Copolymerization of Ethylene with Vinyl Acetate under Mild

This work highlights a medium pressure and temperature radical polymerization process in organic solvents for the synthesis of ethylene–vinyl acetate copolymers (EVA).

Topic: Vinyl Acetate Free Radicals

Abstract: This paper explores the role and chemical properties of vinyl acetate (VAc) in free radical reactions. As an important organic compound widely used in plastics, adhesives, coatings, and pharmaceuticals, VAc interacts with free radicals through addition, polymerization, or decomposition reactions, significantly impacting material processing and applications.

Main Text: The molecular structure of vinyl acetate consists of two vinyl groups (-CH₂=CH-) and an acetic acid ester group (-COOC₂H₅). This unique configuration endows VAc with distinct physical and chemical properties.

1. Physical Properties Vinyl acetate is a colorless liquid with low volatility. It remains stable at room temperature but may decompose under high-energy radiation (e.g., ultraviolet light) or elevated temperatures. Its density is approximately 0.93 g/cm³, with a melting point of ~46°C and a boiling point of ~180°C.

2. Chemical Properties VAc exhibits high reactivity and participates in multiple reaction types:

• Addition Reactions: VAc reacts with free radicals such as hydroperoxy radicals (ROO·), alkoxy radicals (RO₂·), and peroxyalkyl radicals (ROOC·). These additions typically occur during chain growth stages, facilitating polymer formation.
• Polymerization: Under appropriate catalysts, VAc copolymerizes with other monomers to form polymeric materials. For example, it copolymerizes with acrylate esters to produce polyurethane foam plastics.
• Decomposition: When energized (e.g., via UV irradiation or heat), VAc decomposes into smaller molecules like acetaldehyde and ethanol. This process benefits applications such as curing coatings and adhesives.

3. Applications of Free Radical Reactions VAc free radical reactions are integral to numerous industrial processes:

• Plastics Industry: VAc free radicals initiate polymerization to produce specialized plastics, such as polyvinyl alcohol formaldehyde (PVC).
• Coatings Industry: VAc free radicals enable the synthesis of cross-linked coatings (e.g., polyurethane coatings) with enhanced durability and weather resistance.
• Adhesives Industry: VAc free radicals accelerate the curing of epoxy resins, forming robust adhesive layers.
• Pharmaceuticals: VAc free radicals contribute to synthesizing drug intermediates, such as vitamin D3 precursors.

VAc free radicals, as highly reactive chemical species, play critical roles in industrial processes. Through free radical reactions, VAc transforms into diverse polymeric materials, addressing specific application needs. due to their high reactivity and potential hazards, strict safety protocols and operational guidelines must be followed when handling VAc free radicals.