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Mkpuchi
mgbochi yellowing maka injinịa plastikNa mgbakwunye na photooxidation, ihe nkiri na-emepụta resin na mkpuchi nwere ike imebi site na hydrolysis, karịsịa mgbe okpomọkụ nke mkpuchi na-abawanye n'okpuru ìhè anyanwụ.N'okpuru ọnọdụ ndị a, ụmụ irighiri mmiri dị na mkpuchi nwere ike ịwakpo agbụ covalent na resin wee kewaa ụdọ polymer, na-ebute ịdị arọ molekụla dị ala.Polyester na alkyd resins na-enwe ike ịnweta mmetụta a karịa polyurethane na epoxies.
