UHMWPE piv rau Aramid: Koj xav tau cov Fiber Ua Haujlwm Zoo Twg?

Hauv ntiaj teb ntawm cov ntaub ntawv siab heev, ob lub npe yeej ib txwm muaj kev sib tham thaum twg xav tau lub zog, kev ruaj khov, thiab kev tiv thaiv:Polyethylene Qhov Hnyav Molecular Siab Tshaj Plaws (UHMWPE)thiabAramid (feem ntau lees paub los ntawm cov npe lag luam xws li Kevlar® lossis Twaron®)Ob qho tib si yog cov txuj ci tseem ceeb ntawm kev tsim kho, tab sis lawv tsis tuaj yeem sib pauv tau. Kev xaiv qhov tsis raug rau koj daim ntawv thov tshwj xeeb tuaj yeem ua rau tsis ua tiav ua ntej lossis cov nqi tsis tsim nyog.

At Huidun UHMWPE, peb tshwj xeeb hauv kev thawb cov kev txwv ntawm cov thev naus laus zis polyethylene fiber. Txawm li cas los xij, peb ntseeg hais tias yuav tsum muab rau peb cov neeg siv khoom nrog kev pom tseeb ntawm seb cov ntaub ntawv no sib sau ua ke li cas. Hauv phau ntawv qhia no, peb yuav dhia tob rau hauv cov kev paub txog kev siv tshuab, qhov zoo, thiab kev txwv ntawm ob qho tib si fibers los pab koj txiav txim siab yuav khoom.

Yuav kom nkag siab txog lawv cov kev ua tau zoo, peb yuav tsum saib lawv cov DNA molecular. UHMWPE yog polyolefin ua los ntawm cov saw ntev heev ntawm polyethylene. Cov saw no sib dhos ua ke tib qho kev taw qhia, tsim cov khoom siv uas lub zog intermolecular raug siab tshaj plaws, ua rau muaj cov fiber uas muaj zog heev tab sis sib dua txaus kom ntab saum dej.

Ntawm qhov tod tes, Aramid yog cov khoom siv hluavtaws uas muaj ntxhiab tsw qab. Nws cov qauv molecular muaj cov nplhaib tawv uas txuas nrog los ntawm cov hydrogen bonds muaj zog. Qhov no ua rau Aramid tiv taus cua sov thiab tshuaj lom neeg heev, tab sis muab nws qhov ceev dua li nws cov polyethylene counterpart.

Yog tias koj qhov project xav tau lub zog siab tshaj plaws nrog qhov hnyav qis tshaj plaws,UHMWPE yog tus yeej meejNws yog suav tias yog cov fiber muaj zog tshaj plaws hauv ntiaj teb raws li qhov hnyav-kwv yees li 15 npaug muaj zog dua li hlau thiab muaj zog dua li cov fiber Aramid.

Vim tias UHMWPE muaj qhov ceev tsawg dua 1.0 g / cm³, nws ntab. Qhov no ua rau nws yog tus qauv kub rau kev siv hauv hiav txwv, xws li cov kab sib txuas hauv hiav txwv tob thiab cov hlua rub. Aramid, thaum muaj zog, yog li 40% hnyav dua thiab yuav poob rau hauv dej. Rau cov lag luam xws li aerospace lossis cov cuab yeej ua rog tus kheej qhov twg txhua gram suav, qhov hnyav txuag tau los ntawm UHMWPE fibers los ntawm Huidun tuaj yeem hloov pauv qhov kev ua si.

Qhov Achilles 'heel ntawm UHMWPE yog nws qhov rhiab heev rau cua sov. Ua ib qho thermoplastic, UHMWPE pib mos li ntawm 80 ° C txog 100 ° C thiab yaj ntawm kwv yees li 144 ° C txog 152 ° C. Qhov no txwv nws txoj kev siv hauv cov chaw uas muaj kev kub ntxhov siab tas li, xws li cov khoom siv tua hluav taws lossis cov siv tawv kev lag luam muaj kev sib txhuam siab.

Aramid yog tus huab tais tsis muaj kev sib cav ntawm kev tiv taus cua sov. Nws tsis yaj; es tsis txhob, nws carbonizes ntawm qhov kub tshaj 400 ° C. Yog tias koj daim ntawv thov cuam tshuam nrog hluav taws ncaj qha, kev sib txhuam kub siab, lossis qhov chaw kub heev, Aramid yuav yog qhov kev xaiv zoo dua. Txawm li cas los xij, rau feem ntau sab nraum zoov, kev ua tub rog, thiab kev lag luam uas qhov kub tseem nyob hauv qhov ntau thiab tsawg, UHMWPE qhov kev ua tau zoo tseem zoo dua.

Hauv lub ntiaj teb tiag tiag, cov yam ntxwv ib puag ncig feem ntau ua rau lub neej ntawm cov khoom siv. Qhov no yog qhov uasUHMWPE ua tau zoo heevtseem ceeb dua Aramid:

Rau kev tiv thaiv ballistic thiab cov iav tiv taus kev txiav, ob qho tib si cov ntaub ntawv siv dav dav, tab sis lawv muaj cov "kev xav" thiab kev ua tau zoo sib txawv. UHMWPE muaj qhov sib txhuam qis heev, uas ua rau nws muaj qhov "slick". Qhov no ua rau nws zoo heev ntawm kev swb tawm tsam cov nplaim abrasive, ua rau muaj kev tiv thaiv zoo dua hauv cov hlua thiab cov tes tsho kev lag luam.

Hauv cov ntawv thov ballistic (xws li cov tsho tiv thaiv mos txwv), UHMWPE feem ntau nyiam vim nws muaj peev xwm faib lub zog sai sai thoob plaws hauv lub network fiber, muab kev tiv thaiv zoo heev tiv thaiv cov khoom tawg ceev ceev thaum nws sib dua rau tus neeg hnav. Aramid tseem muaj nqis rau nws qhov kev ruaj khov thiab kev tiv thaiv kev sib tsoo, tab sis kev lag luam tab tom txav mus rau UHMWPE-based composites rau cov khoom siv niaj hnub, sib dua.