Polymer volume swelling vs weight gain

In summary, polymer volume swelling vs weight gain refers to the change in size and weight of a polymer when it absorbs a solvent or liquid. This process is measured by comparing the initial and final weight and volume of the polymer. Several factors can influence this phenomenon, including the type of polymer and solvent, temperature, and the presence of additives or fillers. It is important to consider polymer volume swelling when selecting a polymer for a specific application, as it can affect its mechanical properties and chemical resistance. To control swelling and weight gain, one can choose a compatible polymer and solvent, adjust temperature and concentration, and use additives or fillers.
  • #1
Orionabc
8
0
Does the volume swell ratio relate to the weight gain when a crosslinked polymer is emersed in a solvent? Is it as simple as calculating (delta V) = (delta w)/density?
 
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  • #2
What is the density equal to?

You have a polymer with Vp, Wp, and rho_p, and a solvent with Vs, Ws, and rho_s

When the polymer absorbes some solvent of mass w, the polymer mass is equal to Wp+w (since mass is conserved).
About the new polymer volume, you could say that it is equal to Vp+w/rho_s
 

1. What is polymer volume swelling vs weight gain?

Polymer volume swelling vs weight gain is the change in the size and weight of a polymer when it comes into contact with a solvent or other liquid. This process is a result of the polymer absorbing the liquid, causing it to swell and gain weight.

2. How is polymer volume swelling vs weight gain measured?

Polymer volume swelling vs weight gain is typically measured by immersing the polymer in a solvent and measuring the change in weight and volume over time. The initial and final weight and volume are compared to determine the amount of swelling and weight gain.

3. What factors can affect polymer volume swelling vs weight gain?

There are several factors that can affect polymer volume swelling vs weight gain, including the type of polymer, the type and concentration of solvent, temperature, and the presence of additives or fillers in the polymer.

4. Why is polymer volume swelling vs weight gain important?

Polymer volume swelling vs weight gain is important because it can affect the properties and performance of the polymer. For example, swelling can lead to changes in mechanical properties, such as stiffness and strength, and can also affect the permeability and chemical resistance of the polymer.

5. How can polymer volume swelling vs weight gain be controlled?

Polymer volume swelling vs weight gain can be controlled by selecting a polymer with the appropriate properties for a specific application, choosing a solvent that is compatible with the polymer, and adjusting the temperature and concentration of the solvent. Additionally, the use of additives or fillers can also help to control swelling and weight gain in polymers.

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