Rudy
Sorry but you beg the question. If my theory e) is valid, the extraction
for IC would be the agent for hydrolysis.
But I'm as sure as you that the results will be variable.
Brian
Rudy Sedlak wrote:
>
> Brian....you are insightful....
>
> I am a chemist, but not a polymer chemist, and will, as usual, put my
> opinion down, with the caveat that free advice is often not worth what
> you paid for it...
>
> First it is not clear that you want/need a polymer chemist, because it
> is only incidental that the Brominated Phenol is in a polymer...what
> you are concerned about is the presence of free Br- and this
> will/would happen whether or not the Brominated Phenol is part of a
> polymer.
>
> My understanding is that the Br-Phenol bond is reasonably, but not
> perfectly strong, and it is almost certain that the more Br- you have
> on the Phenol, the less stable each bond becomes, and since there are
> 5 sites that a Br could bond to, and we are using 4 of them, my
> suspicion is that the last one is reasonably weak. The test it self
> could free some of the Br-, also, baking, especially in the presence
> of moisture could also likely free up the Br-.
>
> The situation is actually pretty easy to sort out, as free Br- is very
> easily water soluble, so, someone with an ion chromatograph could
> simple wash laminate with deionized water at various points in the
> process, and report what they discover. (Why do I feel that the
> results on this will vary widely, not only from one laminator to
> another, but from one batch of resin to another?)
>
> Anybody with an IC, and some free time?
>
> Rudy Sedlak
> RD Chemical Company
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