Remoldable and Self-Healing Thermoset Materials

The present disclosure provides compositions comprising: (a) a copolymer prepared by a method comprising polymerizing in the presence of a metathesis catalyst: i) a first monomer, wherein each instance of the first monomer is independently of the formula (A) or salt thereof; ii) a second monomer, wherein each instance of the second monomer is independently of the formula (B), (B1), (B2), or a salt thereof; iii) optionally a third monomer, wherein the third monomer is different from the first monomer and the second monomer; and iv) optionally a reprocessing catalyst; and ( b) optionally the reprocessing catalyst; wherein the reprocessing catalyst is a Bronsted acid, Lewis acid, Bronsted base, Lewis base, or a salt thereof; provided that the composition comprises at least one of the reprocessing catalyst of iv) and the reprocessing catalyst of ( b). The compositions may be reprocessed (e.g., remolded) under elevated temperature and/or elevated pressure.