I-UHMWPE vs. i-Aramid: Yimuphi Umshini Osebenza Kakhulu Owudingayo Ngempela?

Ezweni lezinto ezithuthukisiwe, amagama amabili alawula ingxoxo noma nini lapho kudingeka amandla, ukuqina, kanye nokuvikelwa:I-Polyethylene Enesisindo Esiphezulu Kakhulu (UHMWPE)futhiI-Aramid (evame ukuqashelwa ngamagama omkhiqizo afana ne-Kevlar® noma i-Twaron®). Zombili ziyimisebenzi emangalisayo yobunjiniyela, kodwa azikwazi ukushintshaniswa. Ukukhetha okungalungile kwesicelo sakho esithile kungaholela ekuhlulekeni kwangaphambi kwesikhathi noma ezindlekweni ezingadingekile.

At I-Huidun UHMWPE, singochwepheshe ekuphusheni imikhawulo yobuchwepheshe be-polyethylene fiber. Kodwa-ke, sikholelwa ekuhlinzekeni amakhasimende ethu ngokubuka okusobala ukuthi lezi zinto zihlangana kanjani. Kulo mhlahlandlela, sizongena shí ezicini zobuchwepheshe, izinzuzo, kanye nemikhawulo yazo zombili izintambo ukuze sikusize wenze isinqumo sokuthenga esinolwazi.

Ukuze siqonde ukusebenza kwazo, kufanele sibheke i-DNA yazo yama-molecule. I-UHMWPE iyi-polyolefin eyenziwe ngamaketanga amade kakhulu e-polyethylene. Lawa maketanga aqondana ngendlela efanayo, adala izinto lapho amandla aphakathi kwama-molecule ekhuliswa khona, okuholela ku-fiber enamandla kakhulu kodwa elula ngokwanele ukuntanta emanzini.

Ngakolunye uhlangothi, i-Aramid iyi-polyamide enuka kamnandi eyenziwe ngokwenziwa. Isakhiwo sayo sama-molecule siqukethe izindandatho eziqinile ezixhunywe yizibopho ze-hydrogen eziqinile. Lokhu kwenza i-Aramid imelane kakhulu nokushisa namakhemikhali, kodwa iyinika ubuningi obuphezulu kunomlingani wayo we-polyethylene.

Uma iphrojekthi yakho idinga amandla aphezulu kakhulu ngobunzima obuphansi kakhulu,I-UHMWPE iyona ephumelele ngokusobala. Ibhekwa kabanzi njengefayibha enamandla kakhulu emhlabeni ngokwesisindo—cishe iqine ngokuphindwe kayi-15 kunensimbi futhi iqine kakhulu kunefayibha ye-Aramid.

Ngenxa yokuthi i-UHMWPE inobuningi obungaphansi kuka-1.0 g/cm³, iyantanta. Lokhu kuyenza ibe yindinganiso yegolide yokusetshenziswa olwandle, njengezintambo zokubopha olwandle olujulile kanye nezintambo zokudonsa. I-Aramid, yize inamandla, inzima cishe ngo-40% futhi izocwila emanzini. Ezimbonini ezifana nezindiza noma izikhali zomuntu siqu lapho igremu ngalinye libalwa khona, ukonga isisindo okunikezwa yizintambo ze-UHMWPE ezivela ku-Huidun kungaba yinto eshintsha umdlalo.

Isithende sika-Achilles se-UHMWPE ukuzwela kwayo ekushiseni. Njengoba iyi-thermoplastic, i-UHMWPE iqala ukuthamba cishe ngo-80°C kuya ku-100°C futhi incibilike cishe ku-144°C kuya ku-152°C. Lokhu kunciphisa ukusetshenziswa kwayo ezindaweni lapho ukuvezwa kokushisa okuphezulu kuhlala njalo, njengemishini yokulwa nomlilo noma amabhande ezimboni anamandla amakhulu.

I-Aramid iyinkosi engaphikiswana yokumelana nokushisa. Ayincibiliki; kunalokho, i-carbonize emazingeni okushisa angaphezu kuka-400°C. Uma ukusetshenziswa kwakho kuhilela ilangabi eliqondile, ukungqubuzana kokushisa okuphezulu, noma izindawo ezishisayo kakhulu, i-Aramid cishe iyona engcono kakhulu. Kodwa-ke, ekusetshenzisweni okuningi kwangaphandle, kwezindlela, kanye nezimboni lapho amazinga okushisa ehlala ngaphakathi kwebanga elijwayelekile, ukusebenza kwe-UHMWPE kuhlala kuphakeme.

Ezimweni zangempela, izici zemvelo zivame ukunquma isikhathi sokuphila kwento. Yilapho-keI-UHMWPE iyaphumelelakakhulu kune-Aramid:

Ukuze kuvikelwe nge-ballistic kanye negiya elingagundi, zombili izinto zisetshenziswa kabanzi, kodwa zinikeza "imizwa" ehlukene kanye namaphrofayili okusebenza. I-UHMWPE ine-coefficient ephansi kakhulu yokungqubuzana, okwenza kube nomuzwa "obushelelezi". Lokhu kuyenza isebenze kahle kakhulu ekusheleleni ezindaweni ezihudulayo, okuholela ekumelaneni nokuguguleka okuphezulu ezintanjeni nasezikhwameni zezimboni.

Ezisetshenzisweni ze-ballistic (njengezigqoko ezingangenisi izinhlamvu), i-UHMWPE ivame ukuthandwa ngenxa yekhono layo lokusabalalisa amandla ngokushesha kunethiwekhi yefayibha, ihlinzeka ngesivikelo esihle kakhulu ezingcezwini ezinejubane eliphezulu ngenkathi ilula kakhulu kumuntu oyigqokile ukuyiphatha. I-Aramid isaziswa ngokuqina kwayo nokumelana nokubhoboza, kodwa ukuthambekela kwemboni kuya ezinhlanganisela ezisekelwe ku-UHMWPE zemishini yesimanje, elula.