1、The Determination of the Solubility Parameter (δ) and the Mark

The solubility parameter for polymers is usually defined as having the same value as the solvent in which the polymer will dissolve in all proportions without any change in volume or the enthalpy of mixing and would have the highest value for the intrinsic viscosity.

2、Solubility of polymethyl methacrylate and polyvinyl acetate

Tables I and II show that most of the k' values are between 0.3 and 0.4 for the best solvents; but, there are some irregularities with cyclo- hexanone and toluene for polyvinyl acetate because the k' values de- crease instead of increasing.

3、Quantitative Study on Solubility Parameters and Related

In this paper, the solubility parameters and surface parameters of two kinds of common alcoholysis, PVA 88 and PVA 99, are studied by using the IGC method. The accuracy of the solubility parameters obtained by the IGC experiment is verified by molecular dynamics simulation.

4、Solubility parameter of poly(vinyl acetate)

Solubility parameter of poly(vinyl acetate) Data extract from Landolt-Börnstein VIII/6D2: Polymers, Polymer Solutions, Physical Properties and their Relations I (Thermodynamic Properties: PVT-data and miscellaneous properties of polymer solutions)

5、Solubility parameter study of polysulfone, polyvinyl acetate in

In this study, calculate the solubility parameters of polysulfone (PSU), polyvinyl acetate (PVAc) polymers and dimethylacetamide (DMAc) solvent by Hildebrand method.

Solubility parameter of poly (vinyl acetate)

The solubility parameters (δ) of polyvinyl acetate and polyvinyl propionate were estimated by their swelling and solution viscosity measurements in a series of alkyl esters and were compared...

THE SAPONIFICATION OF POLY(VINYL ACETATE)

The value of K changes in different solvents in a way apposite to the intrinsic viscosity. Thus it is clear from the a values in Table 3 that the PV-OAc molecules are more tightly coild as the proportion of water in the acetone/Hs O solvent mixture increases.

The Determination of the Solubility Parameter (δ) and the Mark

The solubility parameter for polymers is usually defined as having the same value as the solvent in which the polymer will dissolve in all proportions without any change in volume or the enthalpy of mixing and would have the highest value for the intrinsic viscosity.

Solubility of polymethyl methacrylate and polyvinyl acetate

In this work, we present a simulation strategy to generate equilibrated structures of the proposed coatings of different PFO content in PVAc.

Dilute solution properties of poly(vinyl acetate). I. Molecular weight

Relationships between limiting viscosity number and molecular weight are reported for the systems poly (vinyl acetate) in acetone at 6 and 30°C, in chloroform at 6°C, and in the Θ-solvent methanol at ...

Polyvinyl acetate (PVAc), also known as poly(vinyl acetate), is an important polymer material widely used in textiles, papermaking, adhesives, and coatings. In solvents, the dissolution behavior of PVAc is influenced by various factors, among which the k-value (solvation constant) is a critical parameter describing the strength of interactions between the solute and solvent. This paper explores the k-value of PVAc in solvents, its influencing factors, and its practical significance.

I. Definition of the k-Value for Polyvinyl Acetate

The k-value refers to the ratio of the interaction force between the solute and solvent to the interaction force between solvent molecules. During solvation, a higher k-value indicates stronger solute-solvent interactions, meaning the solute dissolves more easily in the solvent. Conversely, a lower k-value suggests weaker interactions and poorer solubility.

II. Factors Influencing the k-Value of PVAc

1. Solvent Type: The polarity of the solvent significantly affects PVAc solubility. Highly polar solvents (e.g., methanol, ethanol, acetone) generally enhance PVAc dissolution, while nonpolar or weakly polar solvents (e.g., benzene, toluene) reduce it. Nonpolar solvents like tetrahydrofuran (THF) and chloroform also influence solubility.

2. Temperature: Temperature changes alter solvent properties. Higher temperatures typically increase solvent polarity, favoring PVAc dissolution, while lower temperatures have the opposite effect.

3. Concentration: Within a certain range, increasing solution concentration promotes PVAc dissolution. beyond a threshold, further concentration increases have minimal impact.

4. Additives: Surfactants, chelating agents, and other additives can modify solute-solvent interactions, thereby altering the k-value.

III. Practical Significance of the k-Value

1. Optimal Solvent Selection: In industrial production, studying the k-value helps identify ideal solvent combinations to improve PVAc solubility and product quality.

2. Process Optimization: Adjusting operational conditions (e.g., temperature, concentration) allows optimization of solute-solvent interactions, reducing costs and enhancing efficiency.

3. Dissolution Prediction and Control: The k-value serves as a predictive tool for dissolution behavior under different conditions, guiding industrial processes.

The k-value of PVAc in solvents is a complex, multifactorial parameter. Understanding its determinants and relationships is crucial for improving solubility and production efficiency. By studying the k-value, industries can refine processes, minimize costs, and achieve higher product quality.

Note: Technical terms (e.g., "k-value," solvent names) follow standard chemical nomenclature. Adjustments for stylistic or disciplinary preferences are welcome.