Hi,
I would like to know the interaction of butanone (MEK) and NBR(nitrile butadiene rubber) on a microstructural level .
Any informations or explanation would be of a great help for me.
Dear all, I think still more details are needed, however if you are dealing with hydrogenated NBR the attached file may be usefull. My Regards
hello, I'm gratefull for the information you provided me and I like to clarify that I actually want to know how the NBR dissolves in MEK (does a scission of reticulation happens, or does the solvent create enough gap for interaction of different chains) . In fact, I'm trying to understand the use of MEK in the adhesion of uncured NBR sheet with other components in the manifacturing of elastomer aircraft fuel tanks.
Dear Nadhem,
The use a solvent provokes a jellification and swollen the rubber chains, as for result an increased mobility. This helps to measure chain lengths by solution viscosities.
When solvent evaporates , it causes voids or cracks between the remaining rubber chains due to increase density. So before curing them , all solvents must be removed , that's the main cause of fast ageing .
Cristo Bou Hi , I appreciate your response. It was very insightful. However it made we wonder about the ageing of assembilies that use rubber adhesives. Is there other fillers that prevent their fast ageing ?
Best regards,
Hi, most of the time oil is used to reduce stress caused by those contraction tension, rubber is a very complicated technology with plenty of additives are used for.
Regards
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