1) Nws yog cov khoom tseem ceeb ntawm High kub polyimied zaj duab xis, cob, engineering yas raws li nram no: Polyimide, polyether imide, polyester imide, ib tug polymaleimide, poly aryl amide 2) Nws yog cov khoom siv ntawm 3,3',4,4'-Tetraaminodiphenyl Ether uas yog lub ntsiab monomer ntawm cov khoom muaj ntxhiab heterocyclic kub resistant polymeric khoom 3) Nws yog cov khoom siv hluav taws xob ua haujlwm siab ntawm epoxy resin, polyurethane thiab lwm yam ntaub ntawv polymer thiab tus neeg sawv cev crosslinking.