Actually I don't think there are any amine groups in polyester. You aren't getting mixed up with polyamide?CanBrew wrote:I have a question to add. A fellow in my brewing group expressed concern/speculation about breaking down of the material in a hot, low pH environment. He was wondering:
(a) to what degree the amines leached out of the material
(b) what they might do (I presume by this he meant to the drinker, accumulation in the body that sort of thing, do they affect or even make through the fermentation phase)
Can someone help me with this information?
What can happen to polyester is hydrolysis of the ester. In such a case, the ester link is broken and part of a water molecule is added to each end of the split, putting an alcohol and a carboxylic acid functional group at each end. I wouldn't think this is going on to any significant degree whatsoever during a mash.
I don't have an answer to your question but one thing to note is that plastic soft drink bottles are made from polyester and these bottles have drink in them for months. You would hope that there isn't anything leaching from the bottle into the drink.