PMID 28776036. ^ The vast majority of polyurethanes are thermosets, having said that some thermoplastics can also be made, for instance spandex ^ PP&A stand for polyester, polyamide and acrylate polymers; all of that are accustomed to make artificial fibers. Care needs to be taken not to confuse it with https://petere455hbu9.wikicarrier.com/user