1、Emulsion polymerization of vinyl acetate: Safe optimization of a
This is the case of the emulsion polymerization of vinyl acetate, where the desired product is the homopolymer (PVA) and the most important operating parameter to optimize and scale-up the process is the monomer dosing time, tdos.
2、A Review Paper on Emulsion Polymerization of Vinyl Acetate
This review paper aims at exploring the use and work that had been done on vinyl acetate. Many scientists have much work on vinyl acetate.
3、Differences in emulsion polymerization fouling between acrylates and
For the polymerization of vinyl acetate, the reactor was filled with water, NaHCO 3 and vinyl acetate (VAc, Merck). The emulsifier polyvinyl alcohol (PVOH, M w = 115000 g⋅mol −1, degree of hydrolysis 88%, VWR Chemicals), was added.
4、Understanding the emulsion copolymerization kinetics of vinyl acetate
In the present work, the copolymerization between VAc and vinyl trimethoxysilane (VTMS) is taken as a model system and studied using different polymerization techniques in order to understand the underlying mechanism that governs the emulsion polymerization kinetics.
Emulsion Copolymerization of Vinyl Acetate and Vinyl Silanes: Kinetics
The batch emulsion copolymerization of vinyl acetate with different vinyl silane functional monomers (vinyl trimethoxysilane [VTMS], vinyl triethoxysilane [VTES], and vinyl silanetriol [VSTO]) is studied.
Emulsion Prepared Vinyl Acetate
Vinyl acetate (VAc) based terpolymers exhibit some outstanding properties. In this review, we report different types of vinyl acetate (VAc) based terpolymers, their preparation via emulsion polymerization, properties, and applications. Emulsion is an environment-friendly industrial polymerization technique.
Simulation study on the co
Vinyl acetate-ethylene copolymer is an important chemical product, which is formed by the polymerization of vinyl acetate and ethylene, which involves complex reactions and lacks kinetic parameters.
A Review Paper on Emulsion Polymerization of Vinyl Acetate
Vinyl acetate has been shown to polymerise during the electrolysis of its aqueous acidified emulsion. The stabilisation of the emulsion is difficult and sodium salts of ethoxylated fatty...
(PDF) The Emulsion Polymerization of Vinyl Acetate
Abstract This work investigates the kinetics of the emulsion polymerization of vinyl acetate.
Emulsion Polymerization of Vinyl Acetate
Poly ( vinyl acetate) latexes were the first synthetic polymer latexes to be made on a commercial scale: their production using polyvinyl alcohol as emulsifier began in Germany during the mid-1930s and has continued to the present day, growing steadily with the years.
In the coatings industry, vinyl acetate emulsion is a critical polymer material. Its excellent stability, weather resistance, and superior film-forming properties have made it widely used in construction, automotive, furniture, and other fields. whether vinyl acetate emulsion generates foam has long been a focus of attention. This article discusses this issue, exploring the causes of foam formation and its impact on product quality.
I. Film-Forming Characteristics of Vinyl Acetate Emulsion
Vinyl acetate emulsion is a high-molecular-weight compound copolymerized from vinyl acetate and ethylene, exhibiting remarkable film-forming capabilities. When applied to a substrate, it rapidly cross-links and cures, forming a tough, water-resistant, and chemically stable film. This film also delivers excellent mechanical performance and aesthetic appeal, making it a popular choice for surface treatments in various industrial products.
II. Foam Formation and Elimination
Foam may arise in vinyl acetate emulsion during coating production due to several factors:
- Inadequate emulsifier content or quality: This reduces emulsion stability, increasing foam tendency.
- Interactions with other components: Pigments, fillers, or other formulation ingredients may destabilize the emulsion, indirectly causing foam.
- Processing conditions: Changes in temperature, humidity, or mechanical agitation (e.g., mixing, storage, or application) can disrupt emulsion stability and lead to foam.
To mitigate foam issues, the following measures are recommended:
- Optimize formulation: Increase emulsifier concentration to enhance stability.
- Select compatible materials: Use pigments and fillers that avoid adverse reactions with the emulsion.
- Control production processes: Maintain consistent temperature and humidity to prevent stability fluctuations.
- Improve degassing: Utilize high-pressure spraying or high-speed mixing to expel air bubbles from the emulsion.
III. Impact of Foam on Product Quality
Foam negatively affects the performance of vinyl acetate emulsion:
- Reduces flowability, leading to uneven coating and poor adhesion.
- Lowers glossiness and color vibrancy, compromising aesthetic quality.
- Weakens abrasion resistance and corrosion protection, shortening the coating’s lifespan.
Vinyl acetate emulsion may produce foam during production. Ensuring product quality requires addressing foam through formula optimization, process control, and equipment improvements. Additionally, further research into foam mechanisms is essential to better prevent and manage foam, ultimately enhancing the performance of vinyl acetate emulsion.
