×
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!
  • Students Click Here

*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.

Students Click Here

Jobs

Expanded Polystyrene - Freeze-Thaw Expansion Tests

Expanded Polystyrene - Freeze-Thaw Expansion Tests

Expanded Polystyrene - Freeze-Thaw Expansion Tests

(OP)
Hi,

I have a product which incorporates a laminated piece of glass to a polystyrene substrate. I have read some background research about the potential for water accumulation in polystyrene due to thermal cycling and water vapour transfer. I am interested in the affect of this combined with the application of freezing (ie -20degC) temperatures.

Does the affect of entrapped water affect expansion of polystyrene on freezing? And are there any ASTM (or other) tests which would be suitable to determine if this is a problem?

Cheers,

Rich

RE: Expanded Polystyrene - Freeze-Thaw Expansion Tests

My best guess is that the water levels will be too low to have any effect. Polystyrene is pretty non-polar so the equilibrium water content should be low.

More likely to be a problem is delamination of the bond between the glass and the PS due to the mismatch in thermal expansion coefficient.

Chris DeArmitt

"Knowledge has no value except that which can be gained from its application toward some worthwhile end."
Think and Grow Rich - Napoleon Hill

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