I'm currently identifying an unknown polymer sample and I found out from raman spectroscopy that it may contain aldehyde and carboxylic acid functional groups (and possibly ketone too). I was looking around for a polymer that has aldehyde and carboxylic group but has no luck. So, I was wondering if anyone knows any polymers that contain those functional groups or at least if anyone knows if there is a free polymer database that I can use. Thank you all!

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    $\begingroup$ Polymeric sugar as in cellophan or celluloid? $\endgroup$ – TAR86 Mar 26 at 9:37

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