Polyethylene Synthesis Ụzọ na ụdị dị iche iche
(1) Polyethylene dị njupụta dị ala (LDPE)
Mgbe agbakwunyere ọnụọgụ oxygen ma ọ bụ peroxides dị ka ndị na-amalite na ethylene dị ọcha, gbakọọ ya na ihe dịka 202.6 kPa, wee kpoo ọkụ ruo ihe dịka 200 Celsius, ethylene polymerizes na-acha ọcha, polyethylene waxy. A na-akpọkarị usoro a dị ka usoro nrụgide dị elu n'ihi ọnọdụ ọrụ. Ihe si na polyethylene pụta nwere njupụta nke 0.915–0.930 g/cm³ yana ịdị arọ molekụla sitere na 15,000 ruo 40,000. Ọdịdị ya dị elu na-agbaji nke ọma na nke rụrụ arụ, nke yiri nhazi "osisi dị ka osisi", nke na-eme ka njupụta ya dị ala, ya mere a na-akpọ polyethylene dị ala.
(2) Polyethylene Ọkara-Njupụta (MDPE)
Usoro nrụgide-nrụgide gụnyere polymerizing ethylene n'okpuru 30-100 ikuku na-eji ígwè oxide catalysts. Ihe si na polyethylene pụta nwere njupụta nke 0.931-0.940 g/cm³. Enwere ike ịmepụta MDPE site na ịgwakọta polyethylene dị elu (HDPE) na LDPE ma ọ bụ site na copolymerization nke ethylene na ndị na-emepụta ihe dị ka butene, vinyl acetate, ma ọ bụ acrylates.
(3) Polyethylene njupụta dị elu (HDPE)
N'okpuru ọnọdụ okpomọkụ na nrụgide nkịtị, a na-eme ka ethylene polymerized site na iji nhazi nhazi nke ọma (ogige organometallic nke alkylaluminum na titanium tetrachloride mejupụtara). N'ihi nnukwu ọrụ catalytic, mmeghachi omume polymerization nwere ike mechaa ngwa ngwa na obere nrụgide (0-10 atm) na okpomọkụ dị ala (60-75 ° C), ya mere a na-akpọ usoro nrụgide dị ala. Polyethylene nke si na ya pụta nwere usoro ihe omimi nke enweghị alaka, nke na-enye aka na njupụta ya dị elu (0.941-0.965 g/cm³). Tụnyere LDPE, HDPE na-egosipụta nguzogide okpomọkụ dị elu, akụrụngwa akụrụngwa, yana nguzogide nrụgide gburugburu ebe obibi.
Njirimara nke Polyethylene
Polyethylene bụ mmiri ara ehi-acha ọcha, wax-dị ka, plastic transperent nke ọkara, na-eme ka ọ bụrụ ezigbo mkpuchi na ihe mkpuchi maka wires na eriri. Isi uru ya gụnyere:
(1) Ngwongwo eletrik mara mma: elu mkpuchi mkpuchi na ike dielectric; obere ikike ikike (ε) na dielectric ọnwụ tangent (tanδ) n'ofe ogologo oge niile, na-adaberekarị obere oge, na-eme ka ọ fọrọ nke nta ka ọ bụrụ dielectric dị mma maka eriri nkwurịta okwu.
(2) Ezigbo ihe eji arụ ọrụ: na-agbanwe agbanwe ma sie ike, yana nguzogide nrụrụ dị mma.
(3) Nguzogide siri ike maka ịka nká, okpomọkụ dị ala, na nkwụsi ike nke kemịkal.
(4) Mmiri na-eguzogide mmiri na obere mmiri absorption; Mgbochi mkpuchi n'ozuzu anaghị ebelata mgbe a na-emikpu n'ime mmiri.
(5) Dị ka ihe na-abụghị polar, ọ na-egosiputa nnukwu gas permeability, na LDPE nwere gas kachasị elu n'etiti plastik.
(6) Ike ndọda dị ala, ihe niile dị n'okpuru 1. LDPE bụ ihe ama ama na ihe dịka 0.92 g/cm³, ebe HDPE, n'agbanyeghị njupụta ya dị elu, dị naanị gburugburu 0.94 g/cm³.
(7) Ngwongwo nhazi dị mma: dị mfe ịgbaze na plasticize na-enweghị ire ere, na-eme ka ọ dị ngwa ngwa n'ụdị, ma na-enye ohere ịchịkwa geometry ngwaahịa na nha.
(8) Igwe ndị ejiri polyethylene mee dị arọ, dị mfe ịwụnye, ma dị mfe ịkwụsị. Otú ọ dị, polyethylene nwekwara ọtụtụ ihe ndọghachi azụ: obere okpomọkụ dị nro; ire ọkụ, na-ewepụta ísì dị ka paraffin mgbe ọkụ; adịghị mma gburugburu ebe obibi nrụgide nrụgide na-eguzogide na mgbagha. A chọrọ nlebara anya pụrụ iche mgbe ị na-eji polyethylene dị ka mkpuchi ma ọ bụ ịkwa akwa maka eriri okpuru mmiri ma ọ bụ eriri arụnyere na mkpọda kwụ ọtọ.
Plastics polyethylene maka waya na eriri
(1) Nzube Nzube Mkpuchi Polyethylene Plastic
Ihe mejupụtara ya bụ naanị resin polyethylene na antioxidants.
(2) Plastic Polyethylene na-eguzogide ihu igwe
Ihe mejupụtara ya bụ polyethylene resin, antioxidants, na carbon ojii. Mgbochi ihu igwe na-adabere n'oke urughuru, ọdịnaya, na mgbasa nke carbon ojii.
(3) Nchegbu gburugburu ebe obibi- mgbawa Polyethylene Plastic na-eguzogide
Na-eji polyethylene nwere ntụzịaka mgbaze agbaze n'okpuru 0.3 yana nkesa arọ molekụla dị warara. Enwere ike jikọta polyethylene site na irradiation ma ọ bụ usoro kemịkalụ.
(4) Igwe mkpuchi polyethylene dị elu
Igwe mkpuchi ikuku dị elu chọrọ plastik polyethylene ultra-ọcha, agbakwunyere na voltaji stabilizers na extruders pụrụ iche iji gbochie nguzobe efu, na-egbochi mwepu resin, na melite nguzogide arc, nguzogide mbuze ọkụ, na nguzogide corona.
(5) Semiconductive Polyethylene Plastic
Emepụtara site n'ịgbakwunye carbon ojii na-eduzi na polyethylene, na-ejikarị ezigbo urughuru, carbon ojii arụpụtara elu.
(6) Thermoplastic Low-Smoke Zero-halogen (LSZH) Polyolefin Cable Compound
Ngwakọta a na-eji resin polyethylene dị ka ihe ndabere, na-ejikọta ọkụ ọkụ na-ere ọkụ na-enweghị halogen dị elu, ndị na-egbochi anwụrụ ọkụ, ndị na-ekpo ọkụ ọkụ, ndị na-ahụ maka ọgwụ nje, na agba agba, nke a na-esi na ngwakọta, plasticization, na pelletization.
Polyethylene Crosslinked (XLPE)
N'okpuru ọrụ nke radieshon ike dị elu ma ọ bụ ihe na-agafe agafe, usoro mkpụrụ ndụ linear nke polyethylene na-agbanwe n'ime akụkụ atọ (netwọk), na-agbanwe ihe thermoplastic ka ọ bụrụ thermoset. Mgbe a na-eji ya dị ka mkpuchi.XLPEnwere ike iguzogide okpomọkụ na-arụ ọrụ na-aga n'ihu ruo 90 Celsius C na obere oge okpomọkụ nke 170-250 ° C. Ụzọ ijikọ gafere gụnyere njikọ anụ ahụ na kemịkal. Irradiation crosslinking bụ usoro anụ ahụ, ebe onye na-ahụ maka crosslinking na-emekarị bụ DCP (dicumyl peroxide).
Oge nzipu: Eprel-10-2025