He aha ke General Nā waiwai o ka Polyethylene Resin

'ōeweral Nā waiwai o ka Polyethylene Resin

ʻO ka polyethylene resin he meaʻawaʻawaʻole,ʻeleʻele keʻokeʻo keʻokeʻo a iʻole granule, keʻokeʻo keʻokeʻo keʻokeʻo, me ka manaʻo like me ka wax, a me ka haʻahaʻa wai haʻahaʻa, emi iho ma mua o 0.01%. ʻO ke kiʻiʻoniʻoni polyethylene he akaka a emi iho me ka piʻi ʻana o ka crystallinity. ʻO ke kiʻi polyethylene he haʻahaʻa haʻahaʻa ka wai akā ke kiʻekiʻe o ka ea permeability, ʻaʻole kūpono no ka hoʻopili mālama hou akā kūpono no ka pale ʻana i ka wai. Hiki ke ahi, me ka helu o ka oxygen he 17.4, haʻahaʻa ka uahi i ka wā e ʻā ana, kahi liʻiliʻi o nā kulu hoʻoheheʻe ʻia, melemele ma ka lapalapa a me ka uliuli ma lalo, a me ka ʻala paraffin. ʻOi aku ka maikaʻi o ka polyethylene i ka wai. ʻAʻole polar ka ʻili o ka huahana, paʻakikī ke hoʻopaʻa a paʻi ʻia, a ua hoʻomaikaʻi ʻia e ka mālama ʻana i ka ʻili. ʻO nā kaulahao lālā ʻoi aku ka maikaʻi ʻole i ka photodegradation a me ka oxidation.

Aia kona kaumaha molekala ma waena o 10,000 a 100,000. Inā ʻoi aku ke kaumaha o ka molekala ma mua o 100,000, he polyethylene kaumaha nui loa ia. ʻOi aku ka kiʻekiʻe o ke kaumaha o ka molekala, ʻoi aku ka maikaʻi o kona mau kino kino a me ka mechanical, a ʻoi aku ka kokoke i ka pae i koi ʻia o nā mea ʻenehana. Akā ʻoi aku ka kiʻekiʻe o ke kaumaha molekala, ʻoi aku ka paʻakikī o ka hana. He 100-130°C ko ka polyethylene a he ha'aha'a ha'aha'a ko'iko'i. Hiki iā ia ke mālama i nā waiwai mechanical maikaʻi ma -60 °C, akā ʻo ka mahana hana ʻo 80 ~ 110 °C.

ʻAʻole hiki ke hoʻoheheʻe ʻia i loko o kekahi mea hoʻoheheʻe i ʻike ʻia ma ka lumi wela, a hiki ke hoʻoheheʻe ʻia i loko o ka toluene, amyl acetate, trichlorethylene a me nā mea hoʻonā ʻē aʻe ma luna o 70 ° C.

Nā Pono Uila o ka Polyethylene Resin

No ka mea, he polar ole ka polyethylene, he mau waiwai uila kona me ka poho dielectric haʻahaʻa a me ka ikaika dielectric kiʻekiʻe. Hiki ke hoʻohana ʻia e like me ke alapine modulation insulating material, corona-resistant plastic, a me nā mea insulating high-voltage.

Nā Pono Wela

ʻAʻole kiʻekiʻe ka pale wela o ka polyethylene, a hoʻomaikaʻi ia me ka hoʻonui ʻana o ke kaumaha molekala pili a me ka crystallinity. ʻO ke kūpaʻa haʻahaʻa haʻahaʻa maikaʻi, hiki i ka wela brittle ke generalhiki i lalo -50 ℃; a me ka piʻi ʻana o ka molecular mass, hiki i ka haʻahaʻa ke hiki i -140 ℃. Nui ka huina hoonui laina o ka polyethylene, a hiki i (20～24)×10-5/K. Kiʻekiʻe thermal conductivity.