×
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

fundamentals - storage modulus

fundamentals - storage modulus

fundamentals - storage modulus

(OP)
I am trying to better understand some fundamentals I am struggling with here, any help would be greatly appreciated...

In two phase polymers, how is phase mixing between domains indicated in a storage modulus-temperature sweep graph?

RE: fundamentals - storage modulus

Miscibility is often measured by DSC. A physical mixture will exhibit two distinct glass transition temperatures at the temperatures for the Tg of the separate polymers. A true molecular mixture will show one Tg, probably at a temperature inbetween the Tg of the two starting polymers.

DMTA can also be used to detect Tg and I think that is the answer to your question. In the DMTA sweep, if you see the Tg of two polymers (step drop in modulus with rising temperature for each polymer) then it's a physical mixture (drops of one polymer in the other). If you see one Tg then it's a molecular mixture.

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