Polymer siv ua lub cev Armor - Para-aramid

Nyob rau hauv keeb kwm ntawm txoj kev loj hlob ntawm polymer fibers nyob rau hauv lub ntiaj teb no, nrhiav pom ntawm poly-para-aramid (para-aramid) yog suav hais tias yog ib qho tseem ceeb heev txheej txheem keeb kwm [1]. Nws qhov tseem ceeb nyob hauv:

1) Technically, nws yog thawj fiber ntau tsim los ntawm cov tshiab polymer kua siv lead ua spinning technology, uas muaj kev taw qhia tseem ceeb rau txoj kev loj hlob ntawm cov fibers tom ntej;

2) Vim nws cov khoom siv kho tshuab zoo heev thiab kub tsis kam, nws zoo heev rau daim ntawv thov teb ntawm cov txiv neej ua fibers. Daim ntawv no tsuas yog qhia txog nws txoj kev txhim kho thiab kev siv dav.

Txheej txheem cej luam ntawm para-aramid

Aramid yog hluavtaws hluavtaws polyamide [2]. FTC tau txais ib qho yooj yim txhais ntawm aramid li tsawg kawg yog 85 feem pua ​​​​ntawm cov amide daim ntawv cog lus nyob rau hauv ib qho aramid yog ncaj qha txuas rau ob lub nplhaib aromatic. Para-aramid yog ib hom aramid, muaj npe tom qab pawg amide nyob rau hauv para-txoj hauj lwm ntawm lub nplhaib benzene hauv nws cov qauv qauv. Vim lub xub ntiag ntawm conjugated benzene rings nyob rau hauv lub ntsiab saw ntawm para-aramid, lub molecular saw segments yog tsis nquag mus rau sab hauv kev sib hloov, yog li nthuav tawm ib tug linear rigid qauv, uas kuj ua rau nws muaj cov yam ntxwv ntawm siab zog, siab modulus, thiab thermal stability uas zoo tib yam fibers tsis muaj. Thaum kawg qhib nws daim teb ntawm daim ntawv thov.

Kev tshawb fawb thiab kev txhim kho txheej txheem ntawm para-aramid fiber ntau

Kev tshawb pom ntawm para-aramid thiab kev txhim kho daim ntawv thov tom ntej yog sib cais los ntawm DuPont ntawm Tebchaws Meskas [2]. Raws li thaum ntxov xyoo 1945, nrog rau kev lag luam ntawm nylon fiber ntau thiab kev txhim kho ntawm polyester fiber, DuPont tus thawj coj tau tsim ib txoj kev loj hlob mus sij hawm ntev, vam tias yuav tsim cov fiber ntau nrog ultra-siab zog thiab kub tsis kam hauv kev tsim khoom tom ntej. ntawm fiber. Nyob rau xyoo 1960, DuPont txoj kev txhim kho ntawm cov txheej txheem kub-kub polymerization thiab kev tshawb fawb ntawm cov txheej txheem kev sib cais ntawm cov polymers uas tsis muaj dej txaus txhawb los ntawm cov tshuaj ntsev inorganic tau tsim lub hauv paus rau kev yug me nyuam ntawm aramid. Tom qab ntawd xyoo 1972, DuPont tau daws qhov teeb meem ntawm para-aramid Spinning teeb meem, yog li pib ua lag luam para-aramid thiab hu ua Kelvar.

Kev tshawb fawb thiab kev loj hlob ntawm para-aramid fiber ntau nyob rau hauv ntau lub teb chaws tsis nyob deb, thiab cov khoom zoo sib xws tau pib ua ib qho tom qab. Nyiv lub Tuam Txhab Teijin tau pib tsim nws tus kheej para-aramid fiber ntau hauv xyoo 1972 thiab hu ua Technora. Para-aramid fiber ntau cov khoom tsim tawm los ntawm AkzoNobel hauv Netherlands tau hu ua Twaron hauv xyoo 1986. Kaus Lim Qab Teb Kelon Corporation pib tshawb fawb thiab kev tsim kho hauv xyoo 1979 thiab 2005. Ua tiav qib kev tsim khoom. Russia tau tsim cov kab ntau lawm thaum ntxov li xyoo 1985. Cov khoom tau hu ua Terlon, tab sis tom qab ntawd nws tig mus rau heterocyclic aramid. Nws cov qauv tseem ceeb yog Armos, SVM thiab Rusar.