Njirimara & Ngwa Polyether ether ketone (PEEK).

Polyether ether ketone (PEEK) bụ polymer thermoplastic organic na-enweghị agba na ezinụlọ polyaryletherketone (PAEK), ejiri na ngwa injinịa.Nke bu Victrex PLC webatara ya, wee weba ya Imperial Chemical Industries (ICI) na mbido 1980s.

Njirimara:PEEK bụ thermoplastic nke semirystalline nwere ezigbo nrụ ọrụ na nguzogide kemịkalụ nke edobere na oke okpomọkụ.Ọnọdụ nhazi nke a na-eji na-akpụzi PEEK nwere ike imetụta crystallinity na ya mere ihe eji arụ ọrụ.Modules nke Ntorobịa bụ 3.6GPa yana ike ike ya 90 ruo 100 MPa.[5]PEEK nwere okpomoku mgbanwe iko nke gburugburu 143 Celsius (289 Celsius F) wee gbazee gburugburu 343 °C (662 °F).Ụfọdụ akara ule nwere uru ọ na-arụ ọrụ okpomọkụ ruo 250 Celsius (482 Celsius F).Nrụpụta okpomọkụ na-abawanye ihe fọrọ nke nta ka ọ bụrụ linear na ọnọdụ okpomọkụ dị n'etiti ọnụ ụlọ na okpomọkụ siri ike.Ọ bụ nke ukwuu na-eguzogide mmebi okpomọkụ, yana ọgụ site na ma organic na aqueous gburugburu ebe obibi.Ndị halogens na Bronsted na Lewis acid siri ike wakporo ya, yana ụfọdụ ogige halogenated na aliphatic hydrocarbons na oke okpomọkụ.Ọ bụ soluble na sulfuric acid gbadoro anya na ụlọ okpomọkụ, ọ bụ ezie na mgbasa nwere ike iwe ogologo oge ma ọ bụrụ na polymer dị n'ụdị nwere oke elu-mpaghara-na-olu, dị ka ezigbo ntụ ntụ ma ọ bụ ihe nkiri dị mkpa.Ọ nwere nnukwu iguzogide biodegradation.

Ngwa:N'ihi ike ya, a na-eji PEEK emepụta ihe ndị a na-eji na-achọ ngwa, gụnyere bearings, akụkụ piston, nfuli, kọlụm chromatography mmiri na-arụ ọrụ dị elu, valves plate compressor, na mkpuchi ọkụ eletrik.Ọ bụ otu n'ime plastik ole na ole dakọtara na ngwa oghere dị oke elu.A na-ahụta PEEK dị ka biomaterial dị elu nke a na-eji na ntinye ọgwụ, dịka ọmụmaatụ, iji ihe onyonyo magnetik resonance dị elu (MRI), maka imepụta okpokoro nnọchi akụkụ akụkụ na ngwa neurosurgical.

PEEK na-achọta abawanyela ojiji na ngwaọrụ ngwakọta spinal yana mkpara na-ewusi ike.A na-eji ya nke ukwuu na ụlọ ọrụ ikuku, ụgbọ ala, na usoro kemịkalụ.A na-ejikarị akara PEEK na manifold na ngwa mmiri.PEEK na-arụkwa ọrụ nke ọma na ngwa ebe okpomọkụ na-aga n'ihu (ruo 500 °F/260 Celsius) na-adịkarị.