Wehewehe
ʻO UHMWPE ka acronym o Ultra High Molecular Weight PolyEthylene
ʻO UHMWPE kahi laina laina, haʻahaʻa haʻahaʻa, Ziegler-type-catalyst, polyethylene resin.
Nā Manaʻo
Loaʻa i ka UHMWPE ke kaumaha-awelika paona molekala, ma kahi o ʻumi paha ko ke kaumaha molekala kiʻekiʻe, High density polyethylene (HDPE) resins.
Ma muli o kona kiʻekiʻe kiʻekiʻe kiʻekiʻe molecular density, UHMWPE ka mea ʻelua i ke kūpaʻa abrasion kiʻekiʻe a me ka ikaika hopena kiʻekiʻe loa o kekahi plastic.
ʻO ka ʻoiaʻiʻo, hiki i kahi paʻi mānoanoa 25mm (1″) ke pani i kahi slug pistol 0.38 caliber ma 150 mm (6″).
ʻO UHMWPE ka polimer laina laina maʻalahi (PE) me nā waiwai kūʻokoʻa.
Loaʻa i ka UHMWPE ka ikaika hopena kiʻekiʻe ma waena o nā polymers ʻenekinia ʻē aʻe me ka abrasion maikaʻi loa a me ke kūpaʻa aahu, biocompatibility, ke kū ʻana o ka walaʻau, haʻahaʻa haʻahaʻa haʻahaʻa o ka friction, kūpaʻa kemika maikaʻi a me ke kūpaʻa insulation uila.
Hoʻohui pū ʻia me ke kūpaʻa abrasion a me ka paʻakikī, ʻo ke koena haʻahaʻa o ka friction o UHMWPE e hāʻawi i kahi lubricating ponoʻī, non-stick surface.
ʻOi aku ka haʻahaʻa o nā coefficient static a me ka ikaika ma mua o ke kila a me ka hapa nui o nā mea plastik.
Hiki i ka UHMWPE ke hana ma ke ʻano he biomaterial, ʻoi aku ka nui o nā mea hoʻohui hui e like me ka laʻana o ka prosthesis hip a i ʻole kekahi oki pani pani.
ʻO nā mea i hana ʻia mai UHMWPE e pili ana i ka hoʻouka paʻakikī i nā manawa lōʻihi.
Loaʻa i ka UHMWPE ka viscosity kiʻekiʻe ma mua o ka wela hoʻoheheʻe.
No laila, paʻakikī ke hoʻoponopono ʻana i ka UHMWPE maʻemaʻe ma o ka hoʻoheheʻe ʻana, ka hoʻoheheʻe ʻana, a i ʻole ka extrusion screw maʻamau.
Eia nō naʻe, ʻo ka hoʻemi ʻana i ka viscosity e ka hoʻohui ʻana i nā oligomers kaulahao pōkole hiki ke hoʻopilikia i nā waiwai o nā huahana.
ʻO ka maikaʻi ʻole o ke kaʻina hana kaohi i nā noi nui o UHMWPE.
No ka maʻalahi o kāna hana ʻana no nā noi, ua hui pū ʻia ʻo UHMWPE me ka polyethylene (PE), polypropylene (PP), polyacrylate (PA), polycarbonate (PC), polyaniline (PANI), a me nā mea ʻē aʻe e hoʻomaikaʻi ai i nā waiwai o ia polymers.
Hoʻohana nui ʻia ka polyethylene kiʻekiʻe (HDPE) i ka ʻoihana ma muli o ke kaʻina hana maikaʻi, nā waiwai i makemake ʻia a me nā kumu kūʻai haʻahaʻa.
ʻO ka hui ʻana o ka UHMWPE/HDPE ua huki nui ʻia ka manaʻo ma ke ʻano he mea hoʻomaikaʻi hoʻoponopono hui kanaka no ka mea ʻoi aku ka maikaʻi o ke kū ʻana o ia hui ʻana ma mua o ka UHMWPE maʻemaʻe.
Eia kekahi, he polymer biocompatible ʻo HDPE a hiki i ka hiki ʻana o HDPE ke hoʻomaikaʻi i ka hana o kahi hui UHMWPE.
Ua aʻo ʻia nā waiwai he nui o ka hui ʻana o UHMWPE/HDPE, e like me ka hana ʻana, nā waiwai rheological, nā waiwai oxidative thermal a me nā ʻano hopena.
Inā ʻaʻole ʻike nui ʻia ʻo UHMWPE ma waho o kahi pōʻai o nā loea, ʻike maikaʻi ʻia kāna mau noi ma ka ʻoihana, biomedical a me nā ʻāpana pale.
Ka manawa hoʻouna: Jun-20-2017