Date: Thu Oct 29 16:41:23 2009 ** **Back to Contents ** ------------------------------------------------------------------------ **

Author: Dale E. Stille

Subject: Re: Sad & Happy balls

Post:

JZ,

They are also different polymers. The bouncy is usually just regular
neoprene rubber which has long chains, the non-bouncy is usually some
form of polynorbornene which has long chains with circular pentane
crosslink structures.

Dale

Zani, Gerald wrote:
> Folks,
>
> Why does one ball bounce and the other is "sad" and does not bounce?
>
> Is it due to the cross-links that the sad ball does not bounce?
>
> Why does more cross-links cause the sad ball to not bounce?
>
>
> Thanks,
> - JZ
>


From tap-l-owner@lists.ncsu.edu Thu Oct 29 16:41:23 2009
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