1. polyethylene kiato teitei （HDPE）
Ko te HDPE he paitini, he reka, he hongi, he 0.940-0.976g/cm3 te kiato.Ko te hua o te polymerization i raro i te pehanga iti i raro i te catalysis a Ziegler catalyst, na reira ka kiia hoki te polyethylene kiato teitei te polyethylene iti.
Painga:
Ko te HDPE he momo kapia thermoplastic me te tioata teitei me te kore-polarity i hangaia e te copolymerization o te ethylene.Ko te ahua o te HDPE taketake he miraka ma, a he whakawhiti ki tetahi waahanga i roto i te waahanga kikokore.He tino pai te atete ki te nuinga o nga matū o te whare me te ahumahi, a ka taea e ia te aukati i te waikura me te whakakore i nga waikura kaha (waikawa nitric concentrated), nga tote waikawa-waikawa me nga whakarewa waro (carbon tetrachloride).Ko te polymer he kore-hygroscopic, he pai te aukati i te kohu wai, ka taea te whakamahi mo te makuku me te parenga rerenga.
He ngoikoretanga:
Ko te ngoikoretanga ko te kaha o te pakeketanga me te pakaru o te ahotea o te taiao kaore i te pai ki te LDPE, ina koa ko te waiariki waiariki ka whakaiti i tana mahi, na reira ka taapirihia e te HDPE nga antioxidants me nga kaihoroi UV i te wa e mahia ana hei poroi kirihou hei whakapai ake i ana mahi.ngoikoretanga.
2. polyethylene iti-kiato （LDPE）
Ko te LDPE he kore-paitini, he reka, he kakara, he 0.910-0.940g/cm3 te kiato.Ka polymerized ki te hāora, te peroxide organic ranei hei whakakōkī i raro i te pēhanga teitei o 100-300MPa.Ka kiia hoki ko te polyethylene teitei.Ko te LDPE e kiia ana ko te paipa PE i roto i te umanga irrigation.
Painga:
Ko te polyethylene iti-iti te momo tino mama o nga kapia polyethylene.Ki te whakatauritea ki te HDPE, he iti ake tona kirikiriata (55%-65%) me te waahi ngohengohe (90-100 ℃);he pai te ngawari, te whakaroa, te marama, te aukati makariri me te mahi;tona matū He pai te pumau, te waikawa, te kawakawa me te tote wairewa wai;he pai te whakamaarama hiko me te kaha o te hau;iti te whakauru wai;ngawari ki te tahu.He ngohengohe i roto i te taiao, he pai te toronga, te hiko hiko, te pumau matū, te mahi tukatuka me te iti o te paanga o te pāmahana (ka taea te tu ki te -70 ° C).
He ngoikoretanga:
Ko te kino ko te kaha o te miihini, te aukati makuku, te arai hau me te aukati whakarewa he ngoikore.Ko te hanganga irapoi kaore i te rite tonu, he iti te tioata (55%-65%), he iti ano te waahi whakarewa o te tioata (108-126°C).He iti ake te kaha o te miihini i to te polyethylene kiato-nui, a, he ngoikore tona whakarea whakaerenga, te parenga wera me te taikaha o te ra.Ka taapirihia nga Antioxidants me te UV absorbers ki te whakatika i ona ngoikoretanga.
Wā tuku: Akuhata-17-2022