ʻOkoʻa ma waena o Nylon a me PTFE

ʻO Nylon a me PTFE nā polymers synthetic i hoʻohana nui ʻia i ka ʻoihana polymer.He polyamide ka Nylon a he polymer fluoro ka polymer.Loaʻa iā lāua ʻelua ke kaumaha molekala kiʻekiʻe a he thermoplastics lākou.PTFEhe wai phobic, kemika emi reactive mea me ka kiʻekiʻe uila conductivity, a haʻahaʻa loa coefficient o ka friction.He mea siliki ka Nylon a he mea ʻokoʻa ia no nā metala a me nā metala ʻole, e like me ke keleawe, ke keleawe, ka lāʻau, ka plastics, a me ka ʻōpala.

He aha ka Nylon

ʻO Nylon kahi polymer aliphatic, he polyamide i hoʻohana nui ʻia i nā ʻoihana he nui.ʻO nā nylons nā thermoplastics.Hoʻohana ʻia ʻo ia ma ke ʻano he bearing, a me kahi mea lole.ʻO ka hoʻohana pinepine ʻana o ka nylon ma ke ʻano he pani no ke keleawe, keleawe, kila, a me ka alumini.Eia kekahi, hiki ke hoʻohana ʻia ma ke ʻano he mea ʻokoʻa no ka lāʻau, plastics, a me ka lāʻau.

ʻO ka Nylon kahi mea siliki i hana mua ʻia e Wallace Carothers i ka makahiki 1935. Hana ʻia nā nylons mai ka hopena o ka hexamethylenediamine me adicarboxylic acid (1: 1 ratio) i mua o ka wai, i loko o kahi reactor.

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Hoʻohana ʻia nā ʻili nylon no ka hana ʻana i nā pale mare, nā kaula i nā mea kani, nā moena, nā paipu, nā hale lole, a me nā mea lole.Hoʻohana pū ʻia ke ʻano paʻa o ka nylon i kekahi mau ʻoihana e hana i nā huila a me nā ʻāpana mechanical e pili ana i nā mīkini a me nā ʻili mīkini.ʻO ka extrusion, ka hoʻolei ʻana, a me ka hoʻoheheʻe ʻana i nā ʻenehana i hoʻohana ʻia no ka hana ʻana i nā nylons grade engineering.

He aha ka PTFE?

ʻO ka PTFE he fluoropolymer synthetic i ʻike ʻia he polytetrafluoroethylene (PTFE).He mea ia i ʻike ʻole ʻia e ka Dupont chemist, ʻo Dr. Roy Plunkett i ka makahiki 1960, i ka wā e hana ana ʻo ia i ka ʻimi ʻana i kekahi mea ʻē aʻe no nā kumu hoʻomaha.

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He nui kona mau hoohana kalepa ma muli o kona mau waiwai kino a me kemika.He mea hydrophobic ia.No laila, ʻaʻole hiki i ka wai a me nā ʻoluʻolu i loko o ka wai ke pulu i nā ʻili polimer.Hoʻohana nui ʻia ka polymer i loko o nā ipu kuke ʻole e like me ka uhi.Hoʻohana ʻia kēia ma ke ʻano he lubricant mai ka hoʻemi ʻana i ka friction.Paʻa loa ka hoʻopaʻa ʻana o ka PTFE;no laila, he haʻahaʻa kemika reactivity a me kahi paila kiʻekiʻe.Eia kekahi, loaʻa iā ia kahi conductivity uila maikaʻi.ʻO ka polymer he mea thermoplastic, ʻo ia hoʻi, hoʻololi kona mau waiwai i ka wā e wela ai a maʻalili paha.Loaʻa iā PTFE kēia mau waiwai pono a pau ma muli o kona ʻano mole.

He aha ka ʻokoʻa ma waena o Nylon a me PTFE?

• ʻO nā mea kemika i loaʻa i loko o ka polymer nylon he Carbon, Hydrogen, Oxygen, a me Nitrogen.ʻO ka polymer ka Carbon a me ka Fluorine wale nō.

• Loaʻa i nā nylon a me ka PTFE nā ikaika intramolecular, kahi o ka nylon he "hydrogen bonds" a ʻo ka polymer ʻo "London dispersion forces."

• 'O ka monomer (hui hou) o ka nylon 'o (-NH-[CH2]5-CO-) a 'o ka PTFE (-F2-CC-F2).

• ʻO Nylon kahi mea hydrophilic aʻo PTFE he mea hydrophobic.

PS: E hoʻokaʻaʻike mai iā mākou no ka laʻana manuahi ʻole o nā huahana PTFE