INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Best polymer against corrosive fluid and with low permeability?

Best polymer against corrosive fluid and with low permeability?

Best polymer against corrosive fluid and with low permeability?

(OP)
Hello,

I have 2 interesting questios, I believe, regarding polymer properties. I am designing a ball (pretty much like a basketball in size and appearance) to be used inside pressure vessels for certain corrosive fluids. The ball is inflated with air to a certain pressure in order to cushion extreme pressures in the pipeline (water-hammer). These balls will expand and contract according to pressure drops or pressure rises in water, respectively.

1) First question: These balls be in contact with certain corrosive fluids (under pressure) so I am looking for any or many polymers to be used as the external layer of the ball, so that it does not suffer from exposion to these special corrosive fluids. I have chemical properties of some of them, but I first ask this for any general corrosive fluid, not one in specific.

2) Second question: So far, I have been using polybutadiene as external polymer in the ball and butyl rubber as internal layer, but I believe there could be better choices in terms of lower permeability, as long as the other options can also be moulded and used as the external layer in a ball, for a reasonable cost (i.e, commercial polymers). The idea is to find also a polymer that can hold for a longer time the air inside the ball.

Regards

Felipe

RE: Best polymer against corrosive fluid and with low permeability?

First of all, it would help us to help you if you can identify the corrosive fluids please. For example, are they concentrated alkalis or mineral acids, or are they organic solvents, etc.

Secondly, good alternatives to butyl rubber would be either chlorobutyl or bromobutyl. Both of these exhibit similar levels of impermeability as butyl but are much faster curing, which would be an advantage in co-curing with butadiene rubber.

RE: Best polymer against corrosive fluid and with low permeability?

Felipe, your post is a duplicate of one in the Polymer Engineering forum

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close