Polyether ether ketone (PEEK) yog cov xim tsis muaj xim organic thermoplastic polymer hauv tsev neeg polyaryletherketone (PAEK), siv hauv kev siv engineering.Nws yog thawj zaug qhia los ntawm Victrex PLC, tom qab ntawd Imperial Chemical Industries (ICI) thaum ntxov 1980s.
Khoom:PEEK yog ib qho semicrystalline thermoplastic nrog cov khoom siv zoo heev thiab tshuaj lom neeg uas tau khaws cia rau qhov kub thiab txias.Cov txheej txheem ua haujlwm siv los pwm PEEK tuaj yeem cuam tshuam cov crystallinity thiab yog li cov khoom siv kho tshuab.Cov Young's modulus yog 3.6 GPa thiab nws lub zog tensile 90 txog 100 MPa.[5]PEEK muaj qhov hloov pauv iav ntawm ib puag ncig 143 ° C (289 ° F) thiab melts ncig 343 ° C (662 ° F).Qee qib muaj qhov ua tau zoo ntawm qhov kub thiab txias txog li 250 ° C (482 ° F).Lub thermal conductivity nce ze li ntawm qhov kub thiab txias ntawm chav tsev kub thiab solidus kub.Nws yog heev resistant rau thermal degradation, nrog rau kev tawm tsam los ntawm ob qho tib si organic thiab aqueous ib puag ncig.Nws raug tawm tsam los ntawm halogens thiab muaj zog Bronsted thiab Lewis acids, nrog rau qee cov halogenated tebchaw thiab aliphatic hydrocarbons ntawm qhov kub thiab txias.Nws yog soluble nyob rau hauv concentrated sulfuric acid nyob rau hauv chav tsev kub, txawm hais tias dissolution yuav siv sij hawm ntev heev tshwj tsis yog tias cov polymer yog nyob rau hauv ib daim ntawv nrog ib tug siab-qhov chaw-rau-ntim piv, xws li ib tug zoo hmoov los yog nyias zaj duab xis.Nws muaj kev tiv thaiv siab rau biodegradation.
Daim ntawv thov:Vim tias nws muaj zog, PEEK yog siv los tsim cov khoom siv hauv kev thov, suav nrog cov kabmob, qhov chaw piston, twj tso kua mis, cov khoom ua haujlwm siab ua kua chromatography txhua, compressor phaj li qub, thiab hluav taws xob cable rwb thaiv tsev.Nws yog ib qho ntawm ob peb lub plastics sib xws nrog ultra-high nqus daim ntaub ntawv.PEEK suav hais tias yog ib qho khoom siv biomaterial siab heev uas siv hauv kev kho mob cog, piv txwv li, siv nrog lub siab daws teeb meem sib nqus resonance imaging (MRI), tsim kom muaj ib feem hloov pob txha taub hau hauv kev siv neurosurgical.
PEEK tab tom nrhiav kev siv ntau ntxiv hauv cov khoom siv txha nraub qaum thiab cov pas nrig.Nws yog dav siv nyob rau hauv aerospace, automotive, thiab chemical process industries.PEEK cov ntsaws ruaj ruaj thiab manifolds feem ntau yog siv hauv cov dej siv.PEEK kuj ua tau zoo nyob rau hauv cov ntawv thov uas qhov kub tsis tu ncua (txog 500 ° F / 260 ° C) muaj ntau.
Post lub sij hawm: Dec-24-2018