×
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

Lowest Elastic (Young's) Modulus Elastomer?

Lowest Elastic (Young's) Modulus Elastomer?

Lowest Elastic (Young's) Modulus Elastomer?

(OP)
Anyone know what elastomer or TPE holds the crown for having the lowest elastic (Young's) Modulus? Several nearby competitors may also be useful when it comes to comparing other properties. Is is natural rubber, LDPE/UHMWPE, Resilin, or something else?

Thanks for any enlightenment your willing to share.

Best-

RE: Lowest Elastic (Young's) Modulus Elastomer?

Elastomers are visco-elastic and can be formulated to have close to zero modulus. Modulus depends strongly on temperature and frequency, as well as formulation. There is no simple answer to your simple question.

RE: Lowest Elastic (Young's) Modulus Elastomer?

(OP)
Good answer; my question is bad. I'm still learning, so thanks. I'll try and phrase a better question.

I need an elastomer (or TPE) that requires very little force to be easily elongated whilst always remaining solid in typical outdoor temperatures. If it can have some decent abrasion resistance, that is a plus but not required. Any suggestions?

RE: Lowest Elastic (Young's) Modulus Elastomer?

What sort of elongation with with what pressure?
What sort of temperatures high to low? At low temperatures, it might be brittle.   

RE: Lowest Elastic (Young's) Modulus Elastomer?

(OP)
These are ballpark figures; some give and take can likely be achieved, especially with temperature, but roughly:

35N (8Lbs) force applied (maximum)
28%-33% elongation needed (minimum)
-26C to 41C (-15F to 105F) (maximum)

RE: Lowest Elastic (Young's) Modulus Elastomer?

Approx dimensions?

RE: Lowest Elastic (Young's) Modulus Elastomer?

(OP)
Roughly 3" x 2" x 1/4" at max.

RE: Lowest Elastic (Young's) Modulus Elastomer?

Silicone rubber?

RE: Lowest Elastic (Young's) Modulus Elastomer?

(OP)
Maybe. I think Silicone Rubber probably has the temperature range covered due to it's glass transition temperature, and it might have the elongation as well. I'm a bit hesitant to think Silicone can endure enough abrasion, but I don't have data yet on how much it's going to have to take. It seems like durability and elasticity are a bit at odds, which is why I was originally just looking for something so elastic that I could reduce the quantity to where it's almost out of the way of getting roughed up, but I'm thinking I'll have to go the other direction. If only there was a solid substance that stretched on one or two axis but not so much on a third. Then you start getting into textiles and such but they aren't solid per se. Thanks for the suggestion.

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