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I am working with a commercial monomer (monomethacryloxypropyl terminated polydimethylsiloxane) with an inhibitor of BHT @1%.

I need to remove it for making an ATRP reaction. What is the good way to do this?

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  • $\begingroup$ What monomer? And what are your ideas? $\endgroup$ – Mithoron Oct 20 '17 at 13:55
  • $\begingroup$ MCR-M11 from gelest $\endgroup$ – velleda Oct 20 '17 at 13:57
  • $\begingroup$ I first tried to do it with basic alumina column, but I still have some traces.. $\endgroup$ – velleda Oct 20 '17 at 13:57
  • $\begingroup$ Picture was too big and non-googlable. It may be difficult to don't have traces, dunno what you could do. $\endgroup$ – Mithoron Oct 20 '17 at 14:08
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The BHT is only present to prevent small amounts of potential radicals polymerising the monomer. One option is to simply consume it i. e. Put in one extra per cent of your initiator. Otherwise, similarly to basic alumina, use a basic resin. Once you consume the BHT, your monomer is prone to polymerisation, so you may need to run it into your reactor under your reaction conditions e.g. flushed with nitrogen, pre-cooled, etc

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