HNBR vs Peroxide Cured Nitrile
HNBR vs Peroxide Cured Nitrile
(OP)
I am having a hard time finding a clear comparison of HNBR vs Peroxide Cured Nitrile. My thought is that they are the same material as there is hydrogen in peroxide however I cannot find anything in righting to prove this. My issue is the NBR is not compatible with the Carbonic Acid however HNBR is. And I cannot find Peroxide Cured Nitrile in any chemical compatibility charts. Your help is greatly appreciated.





RE: HNBR vs Peroxide Cured Nitrile
HNBR is more resistant to (ozone) aging on paper. In my opinion all other properties depend on the formulation, ACN content etc.
RE: HNBR vs Peroxide Cured Nitrile
RE: HNBR vs Peroxide Cured Nitrile
RE: HNBR vs Peroxide Cured Nitrile
RE: HNBR vs Peroxide Cured Nitrile
RE: HNBR vs Peroxide Cured Nitrile
tom
RE: HNBR vs Peroxide Cured Nitrile
So still passive of being attacked by the oxygen present on the carbonic acid, or any other oxidant.
Peroxide cured NBR only increases the temperature limit, as the bond C-C have much more energy than C-S or S-S, when you have vulcanization (by the way, Vulcanization must have sulphur... It is a patented, expired of course, but was the process name. Peroxyde is cure...).
NBR can be vulcanized by sulphur or cured by peroxyde,
HNBR will depend of the residual insaturation. Smaller residual insaturation, less double bond on the main chain, and better resistance to oxidation, ozone, etc.
HNBR with certain residual insaturation still possible to vulcanize. Reducing even further, there is no residual insaturation to have the sulphur linking, and you will have to cure wih peroxyde.
It will give you the best resistance to temperature, oxidation and ozone.