Nga Ahuatanga A-tinana, Matū hoki o te Resin Polyethylene

Nga Ahuatanga A-tinana, Matū hoki o te Resin Polyethylene

Āhuatanga Chemical

He pai te noho matū o te Polyethylene, he ātete ki te waimeha waikawa nitric, waimeha waikawa pungatara me tetahi kukū o te waikawa pūmāota, waikawa pūhaumāota, waikawa ūkuikui, waikawa formic, waikawa acetic, wai haukini, amine, hauwai peroxide, konutai waihā, pāhare pāporo, etc otinga. Engari karekau e kaha ki te waikura waikura kaha, penei i te waikawa sulfuric fuming, waikawa nitric concentrated, waikawa chromic me te ranunga waikawa pungatara. I te mahana o te rūma, ko nga wairewa kua whakahuahia i runga ake nei ka paheke i te polyethylene, i te 90-100°C, ka tere te whakakore i te polyethylene te waikawa sulfuric me te waikawa nitric concentrated, ka pakaru, ka pirau ranei. He ngawari te polyethylene ki te whakamaarama-whakaahua, ki te waiariki, ki te pirau e te ozone, me te ngawari ki te whakaheke i raro i te mahi a nga hihi ultraviolet. He pai te whakamarumaru o te waro pango ki te polyethylene. Ko nga tauhohenga penei i te hononga-whakawhitinga, te tapahi mekameka, me te hanganga o nga roopu haunga ka puta i muri i te raranga.

āhuatanga aunoa

Ko nga ahuatanga miihini o te polyethylene he iraral, he iti te kaha o te kaha, he pai te aukati o te ngokingoki, he pai hoki te awangawanga o te paanga. Ko te kaha o te paanga LDPE>LLDPE>HDPE, etahi atu taonga miihini LDPE crystallinity me te taumaha o te ngota ngota, me te whakapai ake o enei tohu, ka piki ake ona taonga miihini. Kaore i te pai te awangawanga o te awangawanga o te taiao, engari ka piki ake te taumaha o te ngota ngota, ka pai ake. He pai te aukati i te wero, kei roto ko te LLDPE te mea pai.

Nga ahuatanga taiao

Ko te polyethylene he polymer koretake o te alkane he pai te pumau matū. He ātete ki te waikura e te waikawa, te kawakawa me te wairewa wai tote i te pāmahana rūma, engari kaore e ātete ki nga waikura kaha penei i te oleum, te waikawa nitric me te waikawa chromic. Ko te polyethylene he kore e rewa i roto i nga whakarewa noa i raro i te 60°C, engari ka pupuhi, ka pakaru ranei i te wa roa ki te whakapiri atu ki nga hauwai aliphatic, waiwaro kakara, hauwai hauhau, me etahi atu. Ina neke ake te mahana i te 60 ℃, ka taea te rewa i roto i te iti o te toruene. , amyl acetate, trichloroethylene, turpentine, tokural te hinu me te paraffin; ka teitei ake te pāmahana i te 100 ℃, ka taea te rewa ki te tetrali roto i.

I te mea kei roto i nga ngota ngota polyethylene he iti noa nga here rua me nga here ether, ka paheke te ra me te ua, me whakapai ake ma te taapiri i nga antioxidants me nga whakapumau marama.

Tukatuka āhuatanga

No te mea he pai te rere o te LDPE me te HDPE, te iti o te pāmahana tukatuka, te ngawari o te pokey, te iti o te wera o te pirau, me te kore e pakaru i te wera nui o te 300 ℃ i roto i te hau inert, he kirihou he pai te mahi tukatuka. Engari, he paku teitei ake te viscosity o te LLDPE, a me whakanui ake te mana motika e 20% ki te 30%; he pai ki te whakarewa i te pakaru, na he mea tika kia whakanui ake i te waahi mate me te taapiri i nga awhina tukatuka; he paku teitei ake te pāmahana tukatuka, tae atu ki te 200 ki te 215 °C. He iti te whakauru wai o te Polyethylene me te kore e whakamaroke i mua i te tukatuka.

Ko te rewa polyethylene he wai kore-Newtonian, he iti ake te rereke o te pokey ki te pāmahana, engari ka heke tere i te pikinga o te reiti kutikuti me te hononga raina, i roto i enei ko te LLDPE te tino heke.

Ko nga hua polyethylene he ngawari ki te whakamaarama i te wa e whakamahana ana, na reira, me aro ki te pāmahana pokepoke i te wa e tukatuka ana. I roto i te tikanga ki te whakahaere i te crystallinity o te hua, kia he āhuatanga rerekē. Ko te polyethylene he nui te whakaheke mo te hanga, me whakaarohia i te wa e hoahoa ana i te pokepoke.

Nga Ahuatanga A-tinana, Matū hoki o te Resin Polyethylene