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ʻOkoʻa koʻikoʻi–UHMW vs HDPE

He mau polymers thermoplastic ʻo UHMW a me HDPE i like ke ʻano. ʻO ka ʻokoʻa nui ma waena o UHMW a me HDPE, ʻo ia ka loaʻa ʻana o nā kaulahao polymer lōʻihi me nā kaumaha molekala kiʻekiʻe loa ʻoiai he kiʻekiʻe ka lakio ikaika-a-density o HDPE.

ʻO UHMW ke kū nei no ka Ultra High Molecular Weight polyethylene. Hōʻailona ʻia hoʻi e UHMWPE. ʻO ka huaʻōlelo HDPE ke kū nei no ka High Density Polyethylene.

He aha ka UHMW?

ʻO ka UHMW he polyethylene kaumaha molekala kiʻekiʻe loa. He ʻano polymer thermoplastic ia. Loaʻa i kēia hui polymer nā kaulahao polymer lōʻihi loa me nā kaumaha molekala kiʻekiʻe (ma kahi o 5-9 miliona amu). No laila, ʻo ka UHMW ka nui o ka molekala. Eia nō naʻe, ʻaʻole hiki ke hoʻokaʻawale ʻia ke ʻano o kēia hui mai ko HDPE.

Nā Waiwai o UHMW

Eia nā waiwai koʻikoʻi o UHMW.

He mea paʻakikī ia.

Loaʻa ka ikaika hopena kiʻekiʻe

ʻAʻohe ʻala a ʻono ʻole

Ka hiki ke paheʻe kiʻekiʻe

Ke kū'ē ʻana i ka haki

He mea hoʻopili ʻole loa ia

ʻAʻohe mea ʻawahia ka hui ʻana, a palekana.

ʻAʻole ia e omo i ka wai.

He lōʻihi loa nā kaulahao polymer a pau ma UHMW, a kūlike lākou ma ke kuhikuhi like. Hoʻopaʻa ʻia kēlā me kēia kaulahao polymer me nā kaulahao polymer ʻē aʻe e hoʻopuni ana ma o nā mana Van der Waal. ʻO kēia ka mea e paʻakikī ai ke ʻano holoʻokoʻa.

Hana ʻia ka UHMW mai ka polymerization o ka monomer, ʻo ia hoʻi ka ethylene. Hoʻokumu ka polymerization o ka ethylene i ka huahana polyethylene kumu. He ʻokoʻa loa ke ʻano o ka UHMW mai ko HDPE ma muli o ke ʻano hana. Hana ʻia ka UHMW i ke alo o ka mea hoʻouluulu metallocene (Hana ʻia ka HDPE i ke alo o ka mea hoʻouluulu Ziegler-Natta).

Nā noi o UHMW

Ka hana ʻana o nā huila hōkū

Nā wili

Nā ʻōwili

Nā mea hana

Nā papa paheʻe

He aha ka HDPE?

He polyethylene kiʻekiʻe ka HDPE. He mea polymer thermoplastic ia. He kiʻekiʻe ka nui o kēia mea ke hoʻohālikelike ʻia me nā ʻano polyethylene ʻē aʻe. Hāʻawi ʻia ka nui o ka HDPE he 0.95 g/cm3. ʻOiai he haʻahaʻa loa ke kekelē o ka lālā kaulahao polymer i loko o kēia mea, ua hoʻopaʻa paʻa ʻia nā kaulahao polymer. ʻO kēia ka mea e paʻakikī ai ka HDPE a hāʻawi i ke kūpaʻa hopena kiʻekiʻe. Hiki ke lawelawe ʻia ka HDPE ma lalo o nā mahana a puni 120°C me ka ʻole o ka hopena ʻino. ʻO kēia ka mea e hiki ai ke hoʻopaʻa ʻia ka HDPE.

Nā Waiwai o HDPE

ʻO nā waiwai koʻikoʻi o ka HDPE,

Paʻakikī iki

Kūleʻa hopena kiʻekiʻe

Hiki ke hoʻopaʻa ʻia

ʻAno opaque a translucent paha

Laki ikaika-i-ka-nui kiʻekiʻe

Māmā ke kaumaha

ʻAʻohe a emi mai paha ka omo ʻana o nā wai

Ke kū'ē kemika

ʻO HDPE kekahi o nā mea palaki i maʻalahi ke hana hou ʻia. Hoʻoholo kēia mau waiwai i nā noi o HDPE.

Nā noi o HDPE

ʻO kekahi mau noi koʻikoʻi e komo pū ana me kēia mau mea.

Hoʻohana ʻia ma ke ʻano he mau ipu no nā hui wai he nui e like me ka waiū a no ka mālama ʻana i nā kemika e like me nā waiʻona.

No ka hana ʻana i nā ʻeke kūʻai plastik

Nā pā

Nā mea hoʻopili paipu

Hoʻohana ʻia hoʻi ka HDPE no nā papa ʻokiʻoki

He aha nā mea like ma waena o UHMW a me HDPE?

Hana ʻia ʻo UHMW a me HDPE me nā monomers ethylene.

He mau polymers thermoplastic nā mea ʻelua.

He ʻano like ʻole ko lāua ʻelua.

Hōʻuluʻulu manaʻo–UHMW vs HDPE

Hana ʻia ʻo UHMW a me HDPE i nā monomers ethylene ma o ka polymerization. ʻO ka ʻokoʻa nui ma waena o UHMW a me HDPE ʻo ia ka UHMW i loaʻa nā kaulahao polymer lōʻihi me nā kaumaha molekala kiʻekiʻe loa ʻoiai ʻo HDPE he ratio ikaika-a-density kiʻekiʻe.