Viton, Ryton, Neoprene, teflon???!! 1

[alseng]

I just need to know the advantages/disadvantages of using these four different Ploymers: Viton, Ryton, Neoprene & teflon. from the view point of compressibilty, heat/cold resistance, chemical reaction/stability with other chemicals, etc..

- Prior Planning Prevents Poor Performance -

 

[GrahamBennett]

Teflon is a trade name for a grade of Viton. Great for high temperatures (200C continuous, 300C intermittent), oxygen,ozone, weathering, oil & fire resistance, water and most fuels/solvents (except acetone when it is rated unsuitable), has good comp set.

Neoprene is a trade name for polychloroprene. Max continuous temp 95C, intermittent 125C,Fair to excellent resistance to your list except benzene (rated unsuitable).

Ryton - never heard of it but if you google ryton polymer and click on the Chevron Philips link you will find an information sheet.

 

[tom1953]

Graham,
Teflon is polytetrafluoroethylene (PTFE), a plastic, while Viton is a fluoropolymer elastomer (rubber) with varying compositions somewhat similar to PTFE.

I had never heard of Ryton either, so you learn something new every day. It seems like it's a plastic material, like Teflon, while neoprene and Viton (FKM) are rubbers/elastomers.
tom

 

[btrueblood]

Ryton is PPS (polyphenylene sulfide), a rigid plastic resin. Teflon = PTFE, a (somewhat less) rigid plastic resin. Viton and Neoprene are elastomers (rubbers).

All of the properties you are interested in could be googled, or look them up on matweb.com. Chemical resistance can be a little tougher to figure out, if you tell us exactly what chemical, we could tell you a bit more. Generally, chemical resistance is best with Teflon, then Viton, then PPS, then neoprene, though there are some gotchas in that list.

 

[GrahamBennett]

Tom,

Thanks for pointing out the difference between Teflon and Viton.

Graham.