Talk:EPDM rubber

Abrasion resistance

I have removed the reference to chainmail and the abrasion resistance text and value. Units of volume are not appropriate for such a measure - I suspect vandalism of a more sophisticated nature in this case. (JGarry (talk) 18:34, 28 May 2010 (UTC))

Color

Re Appearance... the "black colour" is due to the addition of carbon black during compounding, many other colours can be used. 46.37.50.150 (talk) 13:53, 4 October 2013 (UTC)

Tensile Strength

The tensile strength in MPA does not make much sense to me. Most geosynthetics list a kN/m value for tensile strength — Preceding unsigned comment added by 119.225.214.114 (talk) 02:26, 28 April 2015 (UTC)

The tensile strength given in MPa is for the ASTM D412 test. The units you mention are for a tear strength test. Both are measures of strength. AresLiam (talk) 11:34, 28 April 2015 (UTC)

Assessment comment

The comment(s) below were originally left at Talk:EPDM rubber/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.

Page refers to "chainmail" as a product manufactured with EPDM. That reference is probably graffiti.

Last edited at 18:32, 28 May 2010 (UTC). Substituted at 13:58, 29 April 2016 (UTC)

Compatible?

The Properties section says "EPDM is compatible with...". What does "compatible" mean?

EPDM is "incompatible with most hydrocarbons, such as oils, kerosene, aromatic compounds, gasoline..."

I see fan belts that are made from EPDM. If the substance is "incompatible" with oils and gasoline, it seems that it would make a poor material for fan belts. The article also says "...oil coolers, radiators, and degas bottles are connected with EPDM hoses". Again, oil cooler hoses carry oil, but oil is supposedly "incompatible" with EPDM. Can anyone explain this please? Thanks. 71.228.112.175 (talk) 00:57, 9 July 2022 (UTC)

As far as I know, EPDM hoses that handle stuff like that are either coated or made with additives that confer resistance. I can't say anything for sure without actually going through the sources in question, but literature uses the word "compatible" in a lot of different ways. Sometimes "incompatible with X" means "bad for 24/7 submersion in X" (e.g. gasoline in a PETE container) and sometimes it means "will dissolve on contact with a drop of X" (e.g. expanded polystyrene in acetone). jp×g 08:42, 9 July 2022 (UTC)

OK, thanks for that info... Yes, chemistry has its own language. 71.228.112.175 (talk) 19:59, 9 July 2022 (UTC)

You raise a very good point. EPDM is primarily used for applications where it will be exposed to water, outdoor conditions, or glycols. For anything mineral oil related, NBR is the better choice. I think where it says EPDM is used for oil cooler hoses, they mean hoses carrying coolant, not oil, but that's super confusing, and I think it should be removed. (also note that all the automotive applications are listed without any references) As far as fan belts go, EPDM actually does make sense to me. I think the choice of EPDM for belts is probably based on its ozone cracking resistance and longevity. While they may get exposed to oil, they are not supposed to, so oil resistance takes a back seat. Durghums (talk) 01:40, 20 March 2023 (UTC)