Ua like anei ka PET a me ka PE

Ua like anei ka PET a me ka PE?

PET polyethylene terephthalate.

ʻO ka PE he polyethylene.

PE: polyethylene
ʻO ia kekahi o nā mea polymer maʻamau i hoʻohana ʻia i kēlā me kēia lā, a hoʻohana nui ʻia i ka hana ʻana i nā ʻeke plastik, nā kiʻiʻoniʻoni plastik, a me nā bākeke waiū.
Kūpaʻa ka Polyethylene i nā mea hoʻoheheʻe organik a me ka corrosion o nā ʻakika a me nā kumu like ʻole, akā ʻaʻole i nā waikawa oxidative e like me ka waikawa nitric.ʻO ka polyethylene e hoʻoheheʻe ʻia i loko o kahi kaiapuni oxidizing.
Hiki ke noʻonoʻo ʻia ka polyethylene i loko o ka mokuʻāina kiʻiʻoniʻoni, akā i ka wā e loaʻa ai ka nui, e opaque ia ma muli o ka hoʻopuʻi ʻana o ka mālamalama ikaika ma muli o ka nui o nā kristal i loko.Hoʻopili ʻia ka degere o ka crystallization polyethylene e ka helu o nā lālā, a ʻoi aku ka nui o nā lālā, ʻoi aku ka paʻakikī o ka crystallize.Hoʻopili pū ʻia ka mahana hoʻoheheʻe aniani o ka polyethylene e ka helu o nā lālā, mai 90 degere Celsius a 130 degere Celsius.ʻO ka nui o nā lālā, ʻoi aku ka haʻahaʻa o ka wela hoʻoheheʻe.Hiki ke hoʻomākaukau ʻia nā kristal hoʻokahi polyethylene ma o ka hoʻoheheʻe ʻana i ka HDPE i xylene ma nā mahana ma luna o 130 degere Celsius.

PET: polyethylene terephthalate
He polymer o ka waikawa terephthalic a me ka ethylene glycol.ʻO ka pōkole Pelekane ʻo PET, ka mea i hoʻohana nui ʻia i ka hana ʻana o ka polyethylene terephthalate fiber.ʻO ka inoa kālepa Kina he polyester.ʻO kēia ʻano fiber he ikaika kiʻekiʻe a maikaʻi ke hoʻohana ʻana i kāna lole.I kēia manawa ʻo ia ka ʻano hua nui loa o nā fiber synthetic.I ka makahiki 1980, he 5.1 miliona tons ka nui o ka honua, a he 49% ka nui o ka nui o ka fiber synthetic o ka honua.
ʻO ke kūlana kiʻekiʻe o ka symmetry o ka molecular structure a me ka rigidity o ke kaulahao p-phenylene e loaʻa i ka polymer nā hiʻohiʻona o ka crystallinity kiʻekiʻe, ka wela hoʻoheheʻe kiʻekiʻe a hiki ʻole ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe kūlohelohe.ʻO ka mahana heheʻe he 257-265 °C;piʻi kona mānoanoa me ka piʻi ʻana o ka nui o ka crystallinity, ʻo 1.33 g / cm ^ 3 ka nui o ka nui o ke aniani, a ʻo ka nui o ka fiber he 1.38-1.41 g / cm ^ 3 ma muli o ka piʻi ʻana o ka crystallinity ma hope o ke kau ʻana.Mai ka X-ray study, ua helu ʻia ʻo ka piha ʻO ka nui o nā kristal he 1.463 g / cm^3.ʻO ka mahana hoʻololi aniani o ka polymer amorphous he 67 ° C;ʻo ka polymer crystalline he 81°C.ʻO ka wela o ka hui ʻana o ka polymer he 113-122 J/g, ʻo ka mana wela kikoʻī he 1.1-1.4 J/g.Kelvin, he 3.0-3.8 ka mau dielectric, a he 10^11 10^14 ohm.cm.ʻAʻole hiki ke hoʻoheheʻe ʻia ka PET i nā mea hoʻoheheʻe maʻamau, hiki ke hoʻoheheʻe wale ʻia i loko o kekahi mau mea hoʻoheheʻe kino kino e like me nā mea hoʻoheheʻe hui ʻia o phenol, o-chlorophenol, m-cresol, a me trifluoroacetic acid.Paʻa nā fiber PET i nā ʻakika nāwaliwali a me nā kumu.
Hoʻohana Hoʻohana nui ʻia e like me ka mea maka no nā fiber synthetic.Hiki ke hoʻohui ʻia nā pulupulu pōkole me ka pulupulu, ka hulu hipa, a me ka hemp e hana ai i nā lole lole a i ʻole nā ​​lole hoʻonaninani o loko;hiki ke hoʻohanaʻia nā filaments e like me nā lole lole a iʻole nāʻoihanaʻoihana, e like me nā lole kānana, nā kaula pilahi, nā parachutes, nā kāʻei conveyor, ke kāʻei palekana a me nā mea'ē aʻe.Hiki ke hoʻohana ʻia nā ʻāpana i hoʻoheheʻe ʻia e like me nā pahu pahu.

Hiki i kā mākou mau mīkini pahu ke hoʻopiha i nā hue PE a me PET