Learn about plastics (the learning centre area)

I wanted to start a place where we could go to for research or to learn about plastics so here is my first contribution. Dave has done so much in terms of an overview but the field of plastics is large. I think we need all the information we an get.
https://www.britannica.com/science/plastic#ref82466

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Hi all this is my second instalment
https://polymer-additives.specialchem.com

found a great site for information the site is called bookboon I found this book on polymer science and best of all its free
https://bookboon.com/en/introduction-to-polymer-science-and-technology-ebook

Check out the section on plastic quite informative
http://www.ift.org/knowledge-center/read-ift-publications/science-reports/scientific-status-summaries/food-packaging.aspx

I found a plastic injection mold making guide
https://au.3dsystems.com/quickparts/learning-center/injection-molding-basics

I have found a dutch site with little clips about the separation of plastic in the Netherlands: https://www.hvcgroep.nl/nieuws/vlog-1-marit-zoekt-het-uit-%E2%80%93-alles-over-plastic. It’s not translated, but I thought it was worth sharing;)

I found a database

Nice initiative! Here is my contribution: https://marinedebris.noaa.gov/discover-issue/types-and-sources.