PMID 28776036. ^ Many polyurethanes are thermosets, however some thermoplastics can also be made, for instance spandex ^ PP&A stand for polyester, polyamide and acrylate polymers; all of which are used to make synthetic fibers. Care really should be taken never to confuse it with polyphthalamide (PPA) ^ The accumulation https://roselynev556iey0.blog-kids.com/profile