Not a polymer but an amorphous solid like many polymers; I believe she popped that nugget while explaining crystallinity and glass transitions. She was quite knowledgeable otherwise but that little false factoid must have slipped through.

It’s also not the reason church windows are thicker at the bottom, a common myth that my ex-colleague with a PhD in polymer chemistry(!) somehow bought into

Haha no I only knew it could probably only be Irvine and it got me curious so I had to look it up :)

Must have been '98 with Eddie Irvine, and Cinque Terre. 👌🏻