PEEK yog hais txog ib txoj kab kem polymer uas tsim los ntawm ib pab pawg neeg aryl, ketone pab pawg thiab ib qho ether nyiaj. Nws yog lub ntsiab hom ntawm polyaryl ether ketone. Qhov zoo tshaj plaws ntawm PEEK yog kev tiv thaiv tshav kub, thiab qhov siab siv qhov kub siab siv tau mus txog 240. Saum toj no ° C, nws muaj peev xwm tshaj li ntawm 300 ° C tom qab siv lub khob fiber ntau. Qhov thib ob, nws muaj cov khoom siv zoo heev, hluav taws xob rwb thaiv tsev, tshuaj tua tsis haum, dej tsis haum thiab dej ua kom tsis muaj zog, nplaim hluav taws xob thiab hluav taws xob ua haujlwm. Nws yog ib yam tshiab ntawm cov cua sov uas tiv taus polymer nrog kev kawm zoo heev
PEEK yog ib txoj kab kem polymer uas tsim los ntawm lub nplhaib benzene, kev sib txuas ntawm ether thiab pawg ketone. Daim phiajcim molecular muaj ntau lub nplhaib ntawm benzene. Lub benzophenone ua los ntawm ob lub tshuab benzene thiab ib pab pawg neeg ketone thiab ib lub tshuab nplais ntawm benzene ua ib lub tshuab log macromolecular. Cov qauv nruj, thaum lub sij hawm sib sib zog nqhis dej tau muab cov kev hloov ntawm macromolecules, yog li molecular saw ntawm PEEK tuaj yeem pom ob qho yooj yim thiab muag tus yam ntxwv. Sib piv nrog polyphenylene ether, phenylene pawg uas txuas nrog ether daim ntawv cog lus hauv PEEK tsis hloov, vim li ntawd nws cov tshuab macromolecular ntau dua li polyphenylene ether, thiab nws cov Tg (143 ° C) yog qis dua li ntawm polyphenylene ether. Tg (210 ° C). Vim tias nws txoj kev sib txuas ntawm molecular thiab ib qho yooj yim, nws yuav ua tau crystallized, nrog ib tug loj crystallinity ntawm 48% thiab ib qho kev dav ntawm 35%.
Cov carbonyl hauv molecular saw ntawm PEEK muaj lub siab polarity, molecular quab yuam yog siab dua li ntawm polyphenylene ether, thiab nws yuav ua tau crystallized, ces lub zog cohesive siab, ua rau ntau dua mechanical zog tshaj polyphenylene ether, thiab hluav taws xob rwb yog ib nyuag qis dua polyphenylene ether. . Txawm hais tias tus yam ntxwv ntawm PEEK mechanical yuav txo qis heev tom qab dhau Tg, cov khoom siv dag zog tau tuav tau tus nqi siab txawm tias nyob ntawm qhov siab tshaj 200 ° C vim qaug ntawm crystallization.
