PE: Polyethylene PE kēpau kahi ʻāpana keʻokeʻo non-ʻona a ʻaʻohe onaona a i ʻole ka pauka, me kahi keʻokeʻo keʻokeʻo a me ka manaʻo waxy; he lapalapa ia, me ka papa kuhikuhi oxygen ma 17.4% wale nō, uahi haʻahaʻa a kulu i ka wā o ke ahi, melemele ma ka lapalapa a me ka polū ma lalo.
ʻAʻala Paraffin; omo wai haʻahaʻa (polyethyleneLoaʻa iā PE polyethylene PEkahi liʻiliʻi o nā paʻa pālua a me nā hui ether i ka mole, no laila ʻaʻole maikaʻi ke kūʻē ʻana o ka PE, ka lā a me ka ua e hōʻiliʻili i ka ʻelemakule, pono e hoʻohui i nā antioxidants, nā mea hoʻomālamalama māmā e hoʻomaikaʻi i ke kūpaʻa wela o polyethylene PE i ke kinoea inert. maikaʻi, a hiki i ka mahana decomposition hiki i 300â „ƒ a ʻoi paha; akā ke ʻoi aku ka nui o ka mahana i 50â "ƒ i ka mokuʻāina i wela, e hoʻohoihoi ka oxygen i ka hopena degradation, no laila pono e hoʻohui i nā antioxidants e hoʻomaikaʻi ai. ʻO kahi laʻana, ʻo ka antioxidant nui 1010 a me ka antioxidant kōkua 168; ʻaʻole maikaʻi ka pale wela o PE i ka lewa, a e hoʻomaikaʻi ia me ka hoʻonui ʻana o ka mole mole a me ka crystallinity; akā maikaʻi ke kūpale kūpale haʻahaʻa o PE, a me kona pāmahana ha awelika haʻahaʻa ma lalo -50â "ƒ, a me ka hoʻonui ʻia o ke kaupaona mole, hiki i ka mea haʻahaʻa i -140â" ƒ; ʻoi aku ka kiʻekiʻe o ka conductivity thermal o PE, HDPE> LLDPE> LDPE; nui ka coefficient linear hoʻonui o PE, ʻo ia ka mea nui ma waena o nā ʻano lula, a ʻo ka mea kiʻekiʻe loa a i (20 ~ 24) × 10 -5 -5 K -1 -1, LDPE> LLDPE> HDPE.
1. Low-density polyethylene LLDPE haʻahaʻa haʻahaʻapolyethylene LLDPE: He lōʻihi a pōkole hoʻi nā kaulahao mole o ka polyethylene haʻahaʻa haʻahaʻa a me ka crystallinity Low, ʻo ke kaumaha o ka molekole he 50,000 a 500,000, kahi wai paʻa translucent waxy keʻokeʻo resin, ʻaʻohe mea ʻawahia, wahi hoʻomālū haʻahaʻa, hoʻololi maʻalahi, hopena kūʻē, maikaʻi ke kū'ē wela haʻahaʻa, a hiki ma -60â "ƒ E hana ana ma -80â" ƒ, hoʻoweliweli uila maikaʻi loa.
2. Loaʻa maikaʻi ʻole ka ikaika mechanical LDPE, kūpaʻa wela wela, kūpilikiʻi maikaʻi ʻole i ke kaiapili paʻakikī, adhesion, a me ka paʻi paʻi, a koi i ka mālama ʻana i luna e hoʻomaikaʻi i kāna hana. LDPE Hōʻemi wai haʻahaʻa haʻahaʻa, ʻaneʻane ʻaʻohe omo wai, kūpaʻa kemika maikaʻi, e like me ka paʻa i nā waikawa, alkali, paʻakai, a me nā mea hoʻoheheʻe kūlohelohe. ʻO ka permeability kiʻekiʻe i ke kalapona kalapona a me nā ʻaʻala meaola, akā maikaʻi ʻole ka permeability i ka mahu wai a me ka ea. Maʻalahi i ke ahi, he ʻaʻala paraffin ʻo Burning, maʻalahi e hoʻohaʻahaʻa a hoʻololi i ke kala ma lalo o ka hana o ka lā a me ka wela.
3. HDPE polyethylene kiʻekiʻe-kiʻekiʻe:HDPE polyethylene kiʻekiʻe-kiʻekiʻe: ʻO ia he waiū translucent keʻokeʻo waiū keʻokeʻo, ʻo ke kekelē o ka lālā o HDPE ka mea liʻiliʻi loa, a paʻa paʻa ka ikehu molaki paʻa, no laila kiʻekiʻe ke kiʻekiʻe, kiʻekiʻe ka crystallinity. HDPE i kiʻekiʻe wela ia'ku, aila ia'ku, mahu permeability ia'ku a me ke kaiapuni stress cracking ia'ku, uila'īpale, hopena ia'ku a me ke anu ia'ku. Ma ka ikaika ka HDPE a ʻoi aku ka maikaʻi o ka hana ʻelemakule ma mua o ka PP, a ʻoi aku ka kiʻekiʻe o ka mahana hana ma mua o ka PVC a me ka LDPE. Heʻuʻuku ka lawe ʻana o ka HDPE i ka wai, ʻaʻohe mea ʻino, kūpaʻa kemika maikaʻi loa, a haʻahaʻa haʻahaʻa ka kiʻiʻoniʻoni i ka wai wai a me ka ea.
