Currently, I am trying to degraded polymer PET into TPA and nylon66 (PA66) into hexamethylene diamine product at the same pot reaction using microwave digestion. However, this two type of polymer could not simultaneously degrade. I have already tried in different route of acid and alkali. The product that I obtained was only the degraded nylon66 (adpidic acid and hexamethylene diamine) while the PET could not digest at the same pot reaction. Is there anyone has experience on how to depolymerize of PET and Nylon66 at the same time? or do you have any research paper work that could help me to solve this out ? Thank you so much for your kindly suggestion and comment?
Dear Channarith,
Nice academic approach, good question, maybe connected to the chemical recycling of PA/PET blends! I agree with you that the first idea was to try a common acidic hydrolysis for PA and PET (NB: traditionally it is required high temperature, pressure, enough residence time, etc. /See more information in the literature) e.g. using solutions of sulfuric or phosphorous acid if your equipment (microwave digestion) allows this procedure.
On the other hand, it is important to know if your experimental method is correct. My advice is to try to see if you are able to separately decompose the PA 6,6 or the PET in their monomers/oligomers !
Good luck in your R&D project and best regards,
Marius
PS: You will find a lot of literature linked to the subject depolymerization e.g., this is a Review: Greener routes for recycling of polyethylene terephthalate, https://doi.org/10.1016/j.ejpe.2015.03.001
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