We have a feild failed EPDM O-ring which is supposed to be cured by peroxide system. But the field engineer questioned it was actually cured by sulphur. Is there a procedure or quick experiment we can do to confirm the vulcanization system? Thank you for any help.
Hi, we received a injection molding polyurethane part from our new vendor. The surface shows a layer of brownish powder. It can be scratch off easity and was washed off by aceton and acetonitrile easily. Did anybody see this before and know what caused this? How may I determine what is the...
