1) Nws yog cov khoom siv tseem ceeb ntawm cov kub polyimied, cob, knethering yas, polyester kho, Polymaleimide, Poly Aryl AmRyl 2) Nws yog cov khoom siv ntawm 3,3 ', 4,4'-tetraaminerphenp etherors uas yog lub ntsiab monomer heterocclic sov tiv thaiv polymerican khoom 3) Nws yog cov khoom siv ntawm kev ua tau zoo ntawm epoxy cob, polyurethane thiab lwm yam khoom siv polymer thiab cov neeg sawv cev ntawm tus neeg sawv cev.