Question

Neoprene (polychloroprene) and nitrile (butadiene-acrylonitrile) rubbers are
generally favored over SBR (butadiene-styrene) and natural rubbers for automotive underhood
applications. Why?

Answer 1

In Automotive undulaod. a material used bould have follading propeiter 10 better abrasion and tear resistance 2) solvent al resistances 3-) flexible to used in cectam temperature Romge 4.) good thermal Resistant as well as fire restulant s) Resistant to heat and hyeleo carbon Gl Resistance And Neoprene and Nitrile rubbes offer good + resistance towards the hyelso calben ol. - Both of them have wides operating temperature sange → Betlee flame Resistant > beter Cempandability of Neoprene and Nitrile with other component that make them more chemical and physical Resistant after compounding. → Both of them have good Aging and sunlight ses isance But both SBR and natural Rubber have high organic nature and have very low resistance towards hydrocarbon oil and steam and which leads them to swell and breakage over time. - Due to these drowback like how thermal resistance and poor ol sestolance these rubber Canot be used in automotive undeehood.