1. Polyethylene ea boleng bo phahameng (HDPE)
HDPE ha e na chefo, ha e latsoehe ebile ha e na monko, ka boholo ba 0.940-0.976g/cm3.Ke sehlahisoa sa polymerization tlas'a khatello e tlaase tlas'a catalysis ea catalyst ea Ziegler, kahoo polyethylene e phahameng e boetse e bitsoa polyethylene e tlaase.
Molemo:
HDPE ke mofuta oa resin ea thermoplastic e nang le crystallinity e phahameng le e seng polarity e entsoeng ke copolymerization ea ethylene.Ponahalo ea HDPE ea pele e tšoeu ea lebese, 'me e fetoha ho isa bohōleng bo itseng karolong e tšesaane.E na le khanyetso e babatsehang ho lik'hemik'hale tse ngata tsa malapeng le tsa indasteri, 'me e khona ho hanela ho bola le ho qhibiliha ha li-oxidants tse matla (concentrated nitric acid), letsoai la acid-base le metsoako ea organic (carbon tetrachloride).Polymer ha e na hygroscopic ebile e na le matla a ho hanyetsa mouoane oa metsi 'me e ka sebelisoa bakeng sa mongobo le ho thibela metsi.
Khaello:
Phoso ke hore ho hanyetsa ha eona botsofaling le khatello ea khatello ea tikoloho ha e tšoane le LDPE, haholo-holo oxidation ea mocheso e tla fokotsa ts'ebetso ea eona, kahoo HDPE e eketsa li-antioxidants le li-absorber tsa UV ha e etsoa ka li-coil tsa polasetiki ho ntlafatsa ts'ebetso ea eona.mefokolo.
2. Polyethylene ea boleng bo tlase (LDPE)
LDPE ha e chefo, ha e latsoehe ebile ha e na monko, 'me boima ba eona ke 0.910-0.940g/cm3.E entsoe ka polymerized ka oksijene kapa organic peroxide e le mokelikeli tlas'a khatello e phahameng ea 100-300MPa.E boetse e bitsoa polyethylene ea khatello e phahameng.LDPE ka kakaretso e bitsoa pipe ea PE indastering ea nosetso.
Molemo:
Polyethylene e tlaase-tlaase ke mofuta o bobebe ka ho fetisisa oa li-polyethylene resin.Ha e bapisoa le HDPE, crystallinity ea eona (55% -65%) le ntlha e nolofatsang (90-100 ℃) e tlase;e na le ho feto-fetoha ha maemo, ho atolosoa, pepeneneng, ho hanyetsa serame le ho sebetsa hantle;lik'hemik'hale tsa eona Molemo botsitso, asiti, alkali le letsoai aqueous tharollo;ho kenya motlakase hantle le ho kenella ha moea;ho monya metsi a tlase;bonolo ho chesa.E bonolo ka tlhaho 'me e na le extensibility e ntle, motlakase oa motlakase, botsitso ba lik'hemik'hale, ts'ebetso ea ts'ebetso le ho hanyetsa mocheso o tlaase (o ka mamella -70 ° C).
Khaello:
Bothata ke hore matla a eona a mechine, mokoallo oa mongobo, mokoallo oa khase le ho hanyetsa solvent li futsanehile.Sebopeho sa limolek'hule ha se tloaelehe ka ho lekaneng, crystallinity (55% -65%) e tlaase, 'me ntlha ea ho qhibiliha ea crystalline (108-126 ° C) le eona e tlaase.Matla a eona a mochini a tlase ho feta a polyethylene e phahameng haholo, 'me coefficient ea eona ea ho se khonehe, ho hanyetsa mocheso le khanya ea letsatsi e hanyetsa botsofali e futsanehile.Li-Antioxidants le li-absorber tsa UV lia eketsoa ho lokisa mefokolo ea eona.
Nako ea poso: Aug-17-2022