# What is the criteria for polymer solubility?

## What is the criteria for polymer solubility?

Solubility depends on the nature of the solvent, the temperature of the solution, the topology of the polymer, and the crystallinity. Cross-linked polymers do not dissolve, but only swell with the solvent when an interaction between the polymer and the solvent occurs.

### What are ideal solubility parameters?

The solubility parameter is a numerical value that indicates the relative solvency behavior of a specific solvent. It is derived from the cohesive energy density of the solvent, which in turn is derived from the heat of vaporization.

Which polymer has lowest solubility?

Explanation: Epoxy resin is a cross-linking polymer which has lowest solubility among them.

Which polymer has the lowest solubility?

CaI2 are show covalent properties than other CaF2,CaCl2 and CaBr2 compound because of larger size of anion. So, it is least soluble.

## What is ideal solubility?

A logical starting point for approaching formulation development is “ideal solubility”, defined as the solubility of a solute in the perfect solvent for which there is no energy penalty associated with the dissolution process2.

### What is the unit of solubility parameter?

Units. The conventional units for the solubility parameter are (calories per cm3)1/2, or cal1/2 cm−3/2. The SI units are J1/2 m−3/2, equivalent to the pascal1/2.

When to use Hansen solubility parameter ( HSP )?

If we use Hansen Solubility Parameter (HSP), we can easily find solvents for polymers. We explain this procedure briefly. A lot of researcher try to use Hildebrand solubility parameter for this purpose and fail because Hildebrand SP will predict resolvability less than 60%.

What is the interaction radius of the Hansen solubility sphere?

According to Hansen 1, PS has an interaction radius of approximately 12.7 and its partial solubility parameters are ( δd, δp, δh) = (21.3, 5.7, 4.3) and those of acetone are (15.5, 10.4, 7.0). This gives Ra = { (2·15.5 – 2·22.3) 2 + (10.4 – 5.8) 2 + (7.0 – 4.3) 2 } 1/2 = 12.8.

## Can a Hildebrand solubility parameter be used?

A lot of researcher try to use Hildebrand solubility parameter for this purpose and fail because Hildebrand SP will predict resolvability less than 60%. If you use much and much solvents the percentage of success will going down.

### When was the three dimensional solubility parameter introduced?

G. Hansen, C. M., “On the Application of the Three Dimensional Solubility Parameter to the Prediction of Mutual Solubility and Compatibility”, Fiirg och Lack, 13, No. 6, 132 (1967). Preface