Lub siab molecular polyethylene: txheej txheem cej luam, yam ntxwv, uas

Txhua txhua hnub, nyob rau hauv lub cheeb ntawm tib neeg kev ua si introduces cov ntaub ntawv tshiab tau los ntawm dag txhais tau tias. Ib tug ntawm cov yog ib tug high molecular yuag polyethylene, uas yog twb nrog lub 50-ies ntawm lub xyoo pua xeem tau los ua ib tug coj mus muag khoom, tab sis nws yog nkag mus rau hauv tiag tiag tej chaw kom txog thaum tam sim no.

piav qhia

Lub siab molecular yuag polyethylene yog ib tug ntawm cov tsiaj ntawm thermoplastic polymerized ethylene. Nws lub ntsiab feature - ib tug ntev heev molecular chains. Lawv to taub zoo dua thiab kis tus load, "offsetting" lawv intermolecular kev sib tshuam.

Lawv zoo li cov ntaub ntawv uas yog tsis sib txawv los ntawm lwm yam kev yas. Nws twb tsis muaj tsis hnov tsw, saj, nws tsis muaj tshuaj lom zog. Nws muaj peev xwm ua tej yam xim siv hu. Nyob rau tib lub sij hawm nws muaj ib tug txheej ntawm thaj chaw uas paub qhov txawv nws ib qho kev zoo tshaj lwm polymers.

Lub siab molecular yuag polyethylene yog ib tug nyuaj cov ntaub ntawv uas muaj tej yam muaj zog. Nws yog tau withstand loj coob voltage. Nws tsis nqus noo noo, yog vim li cas nws tsis nrog tib neeg daim tawv nqaij thiab nws nkawd nplua. Nyob rau hauv tas li ntawd, nws muaj ib tug high puas kuj (ntau tshaj steel) thiab tsawg coefficient ntawm tsis sib haum xeeb.

Cov khoom ntawm high molecular yuag polyethylene

Raws li twb tau sau tseg, lub ntsiab feature ntawm lub high school polymer molecular chains yog ntev. Ntxiv mus, lawv yog taw qhia kom paub nyob rau hauv tib txoj kev coj. Txheej txheem tshuam thaum uas tig mus txhua lwm yam. Qhov no qhia rau lub dag lub zog ntawm cov khoom.

Txawm tias muaj tseeb hais tias lub siab molecular yuag polyethylene ntaub ntawv ntev chains, kev twb kev txuas ntawm tus neeg molecules yog tsis muaj zog. Qhov no xam yog qis dua hais tias ntawm Kevlar tsawg kawg yog check cov ntaub ntawv uas. Qhov no feature yuav ua rau lub polymer yog tsis sov resistant - nws melts ntawm ib tug kub ntawm 144 degrees Celsius.

Nyob rau hauv no polyethylene muaj pes tsawg leeg nug esters, amines los yog hydroxyl pawg, uas ua rau cov ntaub ntawv raug rau sib active thiab mob tej kev kawm. Vim hais tias ntawm no substance yog tsis raug dej, dej, txhoj puab heev cov neeg ua hauj, kab mob thiab ultraviolet rays.

Lub ntsiab txoj kev ua

Yuav tsum uas yuav tsum tau ua high-molecular polyethylene, GOST 16338-85 muaj. Raws li lawv, cov synthesis ntawm cov ntaub ntawv uas yog nqa tawm nyob rau hauv tus ntawm metallocene catalysts monomer - ethylene. Zus tau tej cov khoom ncaj qha mus rau nram qab no lub ntsiab hom ntawm kev kho mob yog siv:

1. Cov gel-spinning. Raw cov ntaub ntawv yog tov nrog ib tug hnyav. Cov uas ua loj yog nias los ntawm keeb mus rau hauv cov dej. Educated filament hlawv nyob rau hauv furnaces nrog simultaneous rub thiab tshem tawm cov kuab.
2. Kub pressing thiab sintering. Lub hmoov loj yog compressed zoo quab yuam, li no muab homogeneous khoom. Ces nws yog thaum tshav kub kub-kho - sintering ntawm ib tug kub ntawm 150-200 degrees.
3. Ram extrusion. Cov raw khoom yog melted mus rau ib tug homogeneous roj hmab-zoo li loj thiab ces extruded los ntawm tshwj xeeb nozzles.

Feem ntau cov lug gel-spinning. Tseeb, nyob rau hauv no txoj kev tau high molecular yuag polyethylene fibers muaj siab muaj zog.

Siv nyob rau hauv cov tub rog kev lag luam

Lub fibers siv rau zus tau tej cov siab molecular yuag polymer uas yog dav siv rau lub creation ntawm tus kheej tiv thaiv cov khoom, nyob rau hauv particular lub cev tej cuab yeej. Tsaug rau cov zog Filaments raws li ib tug uas tsis muaj kev nyhav thiab siab khees tawm los kev nyuaj siab (tus piv ntawm cov indices yog 7-8 lub sij hawm siab tshaj hais tias ntawm steel) armor tau lub teeb thiab resistant mus bullets, shrapnel thiab lwm yam ua ntsiab.

Lub cev tej cuab yeej ua los ntawm cov ntawv txheeb tau los ntawm blending lub fibers rau txhua lwm yam nyob rau ces kaum sib txawv. Tsaug rau tej technology tshwm multiaxial ntaub - ib tug tshwj xeeb zoo ntawm glassy webs ntxeem txhawj xeeb nyob rau hauv cov kev taw qhia. Siv los tiv thaiv lub cev thiab extremities siab molecular yuag polyethylene. Properties multiaxial ntaub yuav tiv thaiv tau thiab armored tsheb, raws li zoo raws li cov kev siv ntawm fiber los tsim ib qho kev txiav resistant hnab looj tes.

Siv nyob rau hauv cov tshuaj

Nyob rau hauv cov tshuaj, siab molecular yuag polyethylene yog siv mas rau lub creation ntawm kev cog hniav rau cov hip thiab cov nqaj qaum ntawm lub hauv caug. Rau cov thawj lub sij hawm nws twb tau muab siv nrog xws li ib tug lub hom phiaj nyob rau hauv lub deb 1962. Thiab txij thaum ntawd los kuv pib mus rau tus thawj.

Lug siv thiab hloov cov ntaub ntawv uas - reticulated los yog tus ntoo khaub lig-txuas polymer. Nws yog tau los ntawm high molecular yuag polyethylene fibers obstrelivaniya gamma rays los yog electrons, uas yog crosslinked nrog txhua lwm yam yarns. Tom qab ntawd, nws yog raug thermal cawv, uas thiaj li nws oxidation-yuav txo tau muaj peev xwm.

Fibers raws li nyob rau hauv cov raw cov ntaub ntawv yog siv rau cov suturing. Thawj Coj nyob rau hauv qhov siv thiab ua cov khoom no yog lub tuam txhab DSM, uas cov khoom siv lub xov ua lag luam rau kev kho mob sutures hu ua Dyneema Purity.

Siv nyob rau hauv kev lag luam

Cov feem ntau lug siv nyob rau hauv qhov kev lag luam tau pom ib tug high molecular polyethylene ntawv, uas yog txhab khoom mus rau ntau lawm kev ua lag luam slab thickness ntawm 2 cm. Nyob rau lub hauv paus ntawm manufactured yas qhov rais prestigious chav kawm ntawv, PVC-vaj huam sib luag configuration thiab siab PVC profiles.

Nyob rau hauv mechanical engineering rau zus tau tej cov kev sib khi rings, bearings, creation ntawm qhov chaw, ua hauj lwm nyob rau hauv lub hydraulic roj los yog nruab nrab, thiab nyob rau hauv pneumatic tshuab uas muaj kev khiav hauj lwm siab, feem ntau siv high-molecular polyethylene 1000 - ib qho ntawm lub ntsiab polymer hom.