Ifilimu ye-polyethylene ye-UHMW inoxhathiso oluphezulu kakhulu lwe-abrasion, idlula ukuxhathisa kwentsimbi.Idityaniswe nokuxhathisa okubanzi kweekhemikhali kunye ne-coefficient ephantsi yokukhuhlana kwenza i-UHMW ibe yimathiriyeli yobunjineli eguquguqukayo kwizicelo ezininzi zenkonzo eqatha.Imtyibilizi njenge-polymer® Fluoropolymer, kodwa i-brasion ephezulu kwaye iyaxhathisa.Iipolymers ze-UHMW zine-avareji yobunzima bemolekyuli ngokuphindwe kali-10 kuneereyini zepolyethylene ezixineneyo.Ubunzima bemolekyuli obuphezulu bunika i-UHMW Polymers indibaniselwano yayo ekhethekileyo yeempawu Usetyenziso: Imiphezulu yangaphakathi nangaphandle yamanzi okusela, iikhemikhali, i-fuel kunye ne-hydraulic hoses, iindawo ezisezantsi ze-skis kunye neebhodi zekhephu, i-linings ye-chutes ukunciphisa ukukhuhla kunye nokuguga.
Ifilimu etyibilikayo yorhwebo ye-ultra-high molecular-weight-polyethylene (UHMWPE) ene-uniaxial orientation1 ephezulu yaphononongwa ngexesha lokunyibilika kunye nokukhazimliswa kwekristali kunye nesisombululo sexesha se-30s ukuze kuchongwe iindlela zokukhazimla.
Kwafunyaniswa ukuba i-isotropic crystallization yenzeka nanini na xa inyibilika ishushu kwi-140◦C okanye ngaphezulu.Ukunyibilika okujoliswe kuko kwenzeka, ukuba ukunyibilika kugcinwa kwi-138◦C okanye ngaphantsi.Elona qondo lobushushu lokunyibilika libonakala liyi-136◦C.Kweli qondo lobushushu i-semicrystalline nanostructure yefilimu yasekuqaleni iyacinywa ngokupheleleyo, kanti inkumbulo yokuqhelaniswa nenyibiliko igcinwa.Ngaphezu koko, i-crystallization ye-isothermal ayikwazi ukuqaliswa kwiqondo lokushisa le-110◦C nangaphezulu.Kwiqondo lokushisa le-105◦C i-crystallization ejoliswe kuyo iqala emva kwe-2.5 min.I-Lamellae enobunzima obuhla kancinci bukhula ngexesha le-isothermal ye-20 min.
Ngexesha le-crystallization ye-non-isothermal elandelayo (izinga lokupholisa: 20◦C / min) iibhloko ezincinci ze-crystalline kunye nokulungelelaniswa kommelwane olandelayo zenziwa.Ngaloo ndlela iindlela zokucwenga ziyafana nezo zifunyenwe kunye nezinye izinto ze-polyethylene ezinoxinano oluphezulu olwaneleyo lokuxinana kwekhonkco elifundwe ngaphambili, ngaphandle kokupholisa okugqithisileyo okufunekayo ukuqaliswa kwecrystallization ye-isothermal.
Uhlahlelo lwedatha kwisithuba sokwenyani kusetyenziswa i-CDF ene-multidimensional yenziwe.Ngethuba lokunyibilika kwezinto eziphathekayo ubukhulu obuyi-crystalline layers buhlala buhleli (27 nm), ngelixa ixesha elide likhula ngamandla ukusuka kwi-60 nm ukuya kwi-140 nm.Ngenxa yokuba uhlalutyo lubonisa ukuba kwane-nanostructure yokuqala ilawulwa yi-correlations yommelwane olandelayo kuphela oku kuthetha ukuba uzinzo lwe-lamella lukhula ngokukhawuleza njengomsebenzi womgama kubamelwane bawo.Ngelixa isakhiwo sokuqala sibonisa i-lamellae eyandisiweyo, i-recrystallised domains ayibanzi kunomgama phakathi kwabo kwi-fiber direction s3.
Usetyenziso lubandakanya i-lining ye-conveyor, ii-rails zesikhokelo, ii-chute liners, izikhokelo zamakhonkco, i-drawer glides kunye nokunciphisa ingxolo.I-abrasion egqwesileyo kunye nokumelana nokunxiba.
Ixesha lokuthumela: Jun-17-2017