I-polyethylene ye-Ultra-high-molecular-weightweight (UHMWPE, UHMW) i-subset ye-polyethylene ye-thermoplastic.
Eyaziwa ngokuba yi-high-modulus polyethylene, (HMPE), inamatyathanga amade kakhulu, kunye nobunzima bemolekyuli ngokuqhelekileyo phakathi kwe-3.5 kunye ne-7.5 yezigidi ze-amu.Itsheyini elide lisebenza ukuhambisa umthwalo ngokufanelekileyo kwi-polymer backbone ngokomeleza ukusebenzisana kwe-intermolecular.Oku kubangela imathiriyeli enzima kakhulu, enamandla amakhulu empembelelo yayo nayiphi na i-thermoplastic eyenziwe ngoku.
I-UHMWPE ayinavumba, ayinancasa, kwaye ayinatyhefu.Iquka zonke iimpawu ze-polyethylene ephezulu (i-HDPE) eneempawu ezongezelelweyo zokunganyangeki kwi-acids egxininisiweyo kunye ne-alkalis, kunye neentlobo ezininzi ze-solvents eziphilayo.Ixhathisa kakhulu kwiikhemikhali ezonakalisayo ngaphandle kweeasidi ze-oxidising;inokufunxeka okuphantsi kakhulu kokufuma kunye ne-coefficient ephantsi kakhulu yokukhuhlana;i-self-lubricating (jonga ukuthanjiswa komda);kwaye ixhathise kakhulu kwi-abrasion, kwezinye iifom ibe ngamaxesha angama-15 axhathisayo kwi-abrasion kune-carbon steel.I-coefficient yayo ye-friction iphantsi kakhulu kune-nylon kunye ne-acetal kwaye ifaniswa naleyo ye-polytetrafluoroethylene (PTFE, i-polymer), kodwa i-UHMWPE inokuxhatshazwa kwe-abrasion engcono kune-PTFE.
Ixesha lokuthumela: Jun-30-2017