Re: Polymer Structures

You can't alter the structure of these much, with the possible
exception of crosslinking. Any other changes (i.e., adding sidechains,
chemically modifiying them pre/post extrusion,...) will change the of
the polymer enough that it should be considered a new polymer with a
new Tg and Tm. Crosslinking them will have a minimal impact on Tg and
Tm, except that their flow will be greatly reduced.

As an aside, these are all crystalline polymers. Tm will be the
dominate characteristic although Tg certainly exists for these polymers
as well.

Polyprop and nylon are extrudable. ePTFE is a finished product.

John
Aspen Research - www.aspenresearch.com
"Turning Questions into Answers"

Opinions expressed herein are my own and may not represent those of my
employer.

.