Cov nyhuv ntawm qhov kub thiab txias ntawm qhov sib txuas ntawm lub zog sib txuas hauv cov txheej txheem thermoplastic CF-PAEK (PEEK) txheej txheem.
Cov ntawv nyeem yav dhau los tau piav qhia txog qhov cuam tshuam ntawm pwm kub ntawm qhov sib txuas ntawm lub zog ntawm cov thermoplastic carbon fiber polyaryletherketone (CF-PAEK) thiab polyetheretherketone (PEEK) thaum lub sij hawm txheej txheej txheej. Nws tau nkag siab tias qhov nce ntawm qhov kub thiab txias tsis yog tsuas yog txhim kho lub zog ntawm kev sib txuas ntawm lub ntsej muag, tab sis kuj tseem txhim kho lub zog shear. Kab lus no yuav txuas ntxiv mus tham txog cov txiaj ntsig ntawm resin yaj qhov kub ntawm qhov sib txuas ntawm lub zog ntawm ob qho khoom sib xyaw tom qab txheej txheem txheej.
Cov nyhuv ntawm melt kub ntawm lub interfacial bonding zog ntawm thermoplastic CF-PAEK (PEEK) composites.
1.Shear Strength ntawm Coated Composite Materials ntawm txawv Melt Kub: Daim duab saum toj no qhia txog lub zog shear ntawm PEEK / CCF-PAEK thiab SCF-PEEK / CCF-PAEK cov qauv ntawm qhov sib txawv melting kub. Lub zog shear ntawm PEEK / CCF-PAEK yog 69 MPa, 67 MPa, 71 MPa, 67 MPa, thiab 66 MPa, feem, thaum lub zog shear ntawm SCF-PEEK / CCF-PAEK cov qauv yog 84 MPa, 84 MPa, 85 MPa , 87 MPa, thiab 83 MPa, feem. Muab piv cov ntaub ntawv lub zog shear ntawm ob lub thermoplastic resin-coated composite qauv qhia tau hais tias thaum pwm kub yog 260 degree, nce lub melting kub pib txhim kho lub interfacial bonding zog ntawm PEEK / CCF-PAEK, tab sis tom qab ntawd ua rau poob.
2.Interfacial Bonding Performance ntawm SCF-PEEK/CCF-PAEK Cov Qauv ntawm Cov Kub Kub Kub: Daim duab saum toj no qhia txog kev sib txuas ntawm lub xeev ntawm SCF-PEEK / CCF-PAEK cov khoom sib xyaw ntawm ntau qhov kub kub. Thaum pwm kub yog 260 degree, ciam teb ntawm PAEK thiab PEEK ua tsis meej. Raws li lub melting kub nce, ib tug zuj zus tooj ntawm luv luv carbon fibers los ntawm SCF-PEEK nkag mus rau hauv lub PAEK resin. Raws li qhia los ntawm lub voj voog liab hauv daim duab, cov roj carbon fibers luv luv txuas tus ciam teb ntawm ob lub matrix resins, pab txhawb kev sib txuas ntawm lub zog. Thaum cov ntaub ntawv sib xyaw ua ke ntawm thaj chaw sib cuam tshuam, qhov ntws ntawm SCF-PEEK resin tuaj yeem txhim kho los ntawm kev nce qhov kub thiab txias, tso cai rau cov pa roj carbon tsawg dua kom muab tso rau hauv thaj av uas nplua nuj los txhawb kev sib tshuam.
Raws li kev sim cov ntaub ntawv, thaum pwm kub yog 260 degree thiab melting kub ntawm PEEK / CCF-PAEK yog 400 degree, lub zog shear ntawm cov coated composite khoom ncav cuag nws siab tshaj plaws taw tes ntawm 71 MPa. Hloov pauv, rau SCF-PEEK / CCF-PAEK, qhov siab tshaj plaws shear zog ntawm cov qauv sib xyaw yog mus txog ntawm 87 MPa thaum lub melting kub yog 410 degree.
Molecular dynamics simulations qhia tias molecular saw diffusion thiab interfacial txheej txheem yog ho cuam tshuam los ntawm pwm kub.
Raws li pom hauv daim duab saum toj no, PAEK resin yog xim xim av thiab PEEK resin yog xim ntsuab. Cov txheej txheem tshwj xeeb ntawm txheej thiab molding ob lub thermoplastic composites yog pom los ntawm kev siv cov tshuab electron microscopy, tso cai rau kev tshuaj xyuas ntawm molecular diffusion thiab interfacial tsim. Cov txiaj ntsig tau qhia tias pwm kub cuam tshuam cuam tshuam rau kev sib txuas ntawm kev sib txuas, thaum kub kub yuav luag tsis muaj kev cuam tshuam. Yog li ntawd, pwm kub yog teem raws li lub hauv paus tseem ceeb rau simulation kev soj ntsuam nyob rau hauv qhov kev sim, nrog rau kev txhaj tshuaj molding kub tsim nyob rau ntawm 400 degree thiab pwm kub teem ntawm 220 degree, 240 degree, 260 degree, thiab 280 degree, feem.
Cov ntaub ntawv qhia tau hais tias thaum pwm kub nce, qee cov saw hlau molecular nkag mus rau qhov sib cuam tshuam thiab cuam tshuam nrog cov chains ntawm lwm txheej. Nyob rau hauv txheej txheej thiab molding txheej txheem ntawm PEEK / PAEK thermoplastic composites, kev tsim ntawm lub interface nyob ntawm tsis yog tsuas yog nyob rau hauv kev sib nrig sib zog ntawm ob molecular chains tab sis kuj nyob rau hauv tus kheej-tsav ntawm cov molecules.
Daim duab qhia tau hais tias lub vojvoog tig ntawm qhov sib cuam tshuam ntawm PAEK thiab PEEK resins nyob rau hauv qhov sib txawv pwm kub. Nyob rau hauv ntau yam kev ua haujlwm, thaum lub xeev ruaj khov ntawm 300 degree mus txog, lub vojvoog sib hloov ntawm tag nrho cov kab ke maj mam nce. Daim duab b qhia qhov nruab nrab azimuthal hloov chaw-lub sij hawm nkhaus ntawm qhov sib cuam tshuam ntawm PEEK thiab PAEK resins nyob rau hauv qhov sib txawv pwm kub. Tag nrho qhov nruab nrab azimuthal hloov chaw nce sai heev thaum lub sij hawm, qhia tau hais tias raws li qhov kub thiab txias, molecular motion accelerates, ua rau kev txhim kho ntawm interfacial bonding zog. Txawm li cas los xij, thaum qhov kub siab tshaj 280 degree, qhov nruab nrab azimuthal hloov chaw stabilizes, thiab interfacial bonding zog kuj tsis nce.
Daim duab qhia txog kev sib txuas ntawm lub zog thiab qhov sib txawv ntawm ob lub tshuab ntawm qhov sib txawv pwm kub. Nws tuaj yeem pom tau tias thaum pwm kub nce los ntawm 220 degree mus rau 280 degree, qhov diffusion coefficient nce ntawm 7.3 × 10^-10 m²·s^-1 mus rau 14.0 × 10^ -10 m²·s^-1, thaum tus nqi kiag li ntawm lub zog ntawm lub ntsej muag nce siab los ntawm 233.4 kcal·mol^-1 rau 450.8 kcal·mol^{17}}. Piv nrog rau lwm qhov kev hloov pauv kub, qhov sib txawv ntawm qhov sib txawv muaj qhov sib txawv tseem ceeb thaum pwm kub nce los ntawm 220 degree mus rau 240 degree. Nyob rau ntawm lub sijhawm no, tus nqi molecular diffusion nce, uas sib haum nrog cov qauv pom hauv lub zog shear ntawm cov qauv.
Ua ke cov ntawv nyeem dhau los thiab tam sim no, nws tuaj yeem xaus lus tias nyob rau hauv txheej txheej thiab molding txheej txheem ntawm thermoplastic carbon fiber polyaryl ether ketone (PAEK) thiab polyether ether ketone (PEEK) composites, ob qho tib si pwm kub thiab yaj kub muaj feem cuam tshuam rau tag nrho. mechanical zog ntawm composites thiab interfacial bonding zog. Los ntawm kev xaiv cov pwm tsim nyog thiab yaj kub, nws muaj peev xwm tsim cov thermoplastic carbon fiber polyaryl ether ketone composites nrog kev ua tau zoo.
