×
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

Hydrophobic data for plastics
2

Hydrophobic data for plastics

Hydrophobic data for plastics

(OP)
I posted this originally in the materials engineering forum but then realised that this one is more appropriate, so apologies for double posting:

Can anyone supply me with (or point me in the right direction for) comparative data regarding the hydrophobic/hydrophyllic characteristics of the following materials:
polycarbonate - acrylic - ptfe - pctfe.
 

RE: Hydrophobic data for plastics

2
Yes, you need to know the surface energies for those polymers as that is the definition of hydrophobicity.

From the Polymer Handbook 4th Edition

Polycarbonate 42.9
PMMA (acrylic) 41.1
PTFE 23.9
PCTFE 30.9

All in mN/m, mJ/m2 or Dyn/cm (numerically all the same)

As you'd expect the PTFE is lowest and so most hydrophobic.

Beware that surface roughness makes a big differece to the contact angle and apparent hydrophobicity. A good book on that is Polymer Surface Modification by Chan (Hanser Gardner Publishers).

There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell

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