The $C=C$ bond is both good news and bad news. List the uses it brings, and the problems it causes.

Why is polypropylene much less stable than polyethylene?

Why is the C$-$O$-$C bond extremely stable in polyphenylene ether, polysulfones, and polyether ketones, but very easily polymerizable in epoxy resins?

List the commercial polymers which are strengthened by the presence of the C$-$N Bond

Which halogen element gives $($a$)$ the most non$-$stick $($abhesive$)$ quality, $($b$)$ the lowest price, $($c$)$ the greatest flame$-$retardance?