Otu esi eme plastik polyethylene site na ihe ndị e ji emepụta ihe
Plastik polyethylene bụ otu n'ime ụdị plastik a na-ejikarị eme ihe n'ọtụtụ ụlọ ọrụ, site na nri ruo na nnukwu ụlọ ọrụ mmepụta ihe. A maara plastik a maka ịdịte aka, mgbanwe ya, na iguzogide kemịkalụ dị iche iche. N'isiokwu a, anyị ga-atụle usoro ndị bụ isi n'usoro imepụta plastik polyethylene (PE) site na ihe ndị e ji emepụta plastik.
1. Okwu Mmalite nke Polyethylene
Polyethylene (PE) bụ polima thermoplastic nke e ji polymerization nke ethylene mepụta. E nwere ọtụtụ ụdị polyethylene, gụnyere Low-Density Polyethylene (LDPE), High-Density Polyethylene (HDPE), Linear Low-Density Polyethylene (LLDPE), na ndị ọzọ. Ụdị ọ bụla nwere njirimara na ojiji dị iche iche. Tupu anyị aghọta usoro mmepụta polyethylene, anyị kwesịrị ịghọta isi ihe eji eme ihe: ethylene.
2. Ethylene: Ihe dị mkpa
Ethylene bụ gas na-enweghị agba, nke nwere usoro kemịkalụ C2H4. A na-enwetakarị Ethylene site na usoro mgbawa nke mmanụ ala. N'oge okpomọkụ dị elu, a na-agbanwe mmanụ ala ka ọ bụrụ ọtụtụ ihe mejupụtara hydrocarbon, otu n'ime ha bụ ethylene. A na-asacha gas Ethylene ma chekwaa ya n'ọnọdụ mmiri mmiri tupu e jiri ya mee ihe na usoro polymerization.
3. Ụzọ Mmepụta Polyethylene
E nwere ụzọ abụọ bụ isi e si eme mmepụta polyethylene: ime ka gas polymerization na ime ka ngwọta polymerization dị. Ụzọ abụọ a dabere na mmeghachi omume kemịkalụ nke nwere ike ịga n'ihu nke ọma n'okpuru ọtụtụ ọnọdụ okpomọkụ na nrụgide.
4. Usoro Mmezi Polymerization
a. Ndozi Polymerization Radikal n'efu
A na-ejikarị usoro a eme ihe n'ịmepụta LDPE. Lee usoro izugbe n'usoro a:
– Mmalite: Usoro a na-amalite site n'ịmepụta ihe ndị na-emepụta ihe dị ka benzoyl peroxide, nke nwere ike ịkpata mmebi ahụ.
– Mgbasa: Ihe ndị a na-emeghachi omume na molekul ethylene iji mepụta agbụ ọhụrụ, ndị dị ogologo.
– Nkwụsị: Enwere ike ịkwụsị agbụ polymer site na usoro dị iche iche, gụnyere njikọta nke radicals abụọ ma ọ bụ nnyefe agbụ.
b. Nhazi Polymerization
A na-eji usoro a emepụta HDPE na LLDPE. Usoro a gụnyere ihe na-akpali akpali Ziegler-Natta ma ọ bụ ihe na-akpali akpali metallocene:
– Mmalite: Ethylene na-ejikọ na ebe ọrụ dị na ihe na-akpali akpali, nke na-abụkarị ion ígwè dị ka titanium ma ọ bụ zirconium.
– Mgbasa: Ethylene na-emeghachi omume na monomers dị na ebe a na-arụ ọrụ iji mepụta agbụ polymer.
– Nkwụsị: A na-akwụsị usoro a mgbe ebe niile na-arụ ọrụ na ihe mkpali ahụ kwụsịrị ịrụ ọrụ ma ọ bụ kwụsị mmeghachi omume ahụ.
5. Ihe mgbakwunye na mgbanwe
N'oge mmepụta polyethylene, enwere ike itinye ihe mgbakwunye dị iche iche dịka ihe na-eme ka plastik ahụ sie ike, ihe na-egbochi antioxidant, na ihe na-agba agba iji melite njirimara ikpeazụ nke plastik ahụ. Usoro a na-eme n'oge ma ọ bụ mgbe usoro polymerization gasịrị, dabere na ihe achọrọ kpọmkwem nke ngwaahịa ikpeazụ.
6. Usoro nhazi
Mgbe emechara ka ọ dị ọcha, polyethylene a na-esi na ya apụta na-adị n'ụdị pellets ma ọ bụ obere granules. Nhazi ọzọ gụnyere ịgbaze ma mepụta polyethylene ka ọ bụrụ ngwaahịa ikpeazụ. Usoro nhazi a na-ejikarị eme ihe gụnyere:
– Mkpọpụta: A na-agbaze polyethylene ma na-akwanye ya site na ihe e ji kpụọ mpempe akwụkwọ, paịpụ, ma ọ bụ ihe nkiri.
– Ịkpụzi ihe n'ime mmiri: A na-agbaze polyethylene ma gbanye ya n'ime ebu iji mepụta ngwaahịa pụrụ iche dịka karama ma ọ bụ ihe eji arụ ọrụ injinia.
– Ịkpụcha ihe: A na-agbaze polyethylene ma fesaa ya ka ọ bụrụ ihe e ji akpụ ihe dị ka karama plastik.
7. Nnwale Ogo
A ga-anwale ngwaahịa polyethylene dị iche iche iji hụ na ha ruru ihe achọrọ. Nnwale ndị a na-emekarị gụnyere ike nrụgide, mmetụta, na iguzogide kemịkalụ.
8. Uru na ojiji nke Polyethylene
Polyethylene nwere ọtụtụ ihe eji eme ihe n'ihi na ọ na-adịgide adịgide, ọ na-agbanwe agbanwe, na ọnụ ahịa ya dị ala. Ụfọdụ ihe eji eme ihe ndị a na-ahụkarị gụnyere:
– Nkwakọ ngwaahịa: A na-eji polyethylene eme ihe n'imepụta ihe nkiri nkwakọ ngwaahịa, akpa plastik, na karama.
– Owuwu: A na-eji HDPE emepụta paịpụ ndị na-eguzogide nchara na nrụgide dị elu.
– Ụlọ Ọrụ Nri: A na-ejikarị Polyethylene eme ihe mkpuchi ihe eji ekpuchi nri n'ihi na ọ naghị egbu egbu ma na-eguzogide mmiri.
9. Ihe ịma aka na ọdịnihu
Ọ bụ ezie na polyethylene nwere ọtụtụ uru, ihe ịma aka ya bụ nsogbu gburugburu ebe obibi. Polyethylene bụ ihe siri ike ịgbaze ngwa ngwa, nke na-eduga n'ịchịkọta ihe mkpofu plastik. Ya mere, a na-eme nnyocha na mmepe iji chọta ụzọ mmepụta ihe na-adịghị emerụ gburugburu ebe obibi ahụ ma na-emegharị polyethylene iji hụ na usoro ndụ na-adịgide adịgide.
Mmechi
Imepụta polyethylene site na ihe ndị e ji emepụta ihe bụ usoro dị mgbagwoju anya mana dị oke mkpa maka ụlọ ọrụ dị iche iche. Site na mwepụta ethylene ruo nhazi ikpeazụ gaa na ngwaahịa plastik, nzọụkwụ ọ bụla na-achọ imepụta ihe na-adịgide adịgide, na-agbanwe agbanwe, na nke nwere ike ịgbanwe agbanwe. Ka a na-amatakwu mmetụta gburugburu ebe obibi ya, imepụta ihe ọhụrụ na mmepụta polyethylene na ụzọ imegharị ihe dị mkpa iji hụ na uru nke ihe a enweghị ihe ọjọọ ọ bụla maka ụwa anyị.
Ọ dị mkpa ka mmụta na mmezi na-aga n'ihu ọ bụghị naanị na teknụzụ mmepụta kamakwa na iwu na amụma ndị na-agba ume ka e jiri plastik mee ihe n'ụzọ kwesịrị ekwesị. N'ụzọ dị otu a, anyị nwere ike ijide n'aka na mmepụta na ojiji nke polyethylene na-enye uru kachasị mma na obere mmetụta gburugburu ebe obibi.
