-
Nā uhi
pale melemele no ka ʻenekinia plastikMa waho aʻe o ka photooxidation, hiki ke hoʻohaʻahaʻa ʻia ke kiʻiʻoniʻoni e hana ana i ka resin i loko o ka uhi e ka hydrolysis, ʻoi aku ka nui o ka piʻi ʻana o ka mahana o ka uhi ma lalo o ka lā kiʻekiʻe.Ma lalo o kēia mau kūlana, hiki i nā molekala wai i hoʻopaʻa ʻia i loko o ka uhi ke hoʻouka i nā paʻa covalent i loko o ka resin a hoʻokaʻawale i nā kaulahao polymer, e hopena i ke kaumaha molekala haʻahaʻa.ʻOi aku ka maʻalahi o nā resins polyester a me alkyd i kēia hopena ma mua o nā polyurethanes a me nā epoxies.
