Ihe ọmụma bụ isi gbasara ụdị atọ nke ihe PE (I)

1. Akwa-njupụta polyethylene (HDPE)

HDPE adịghị egbu egbu, enweghị ụtọ na isi ísì, yana njupụta nke 0.940-0.976g/cm3.Ọ bụ ngwaahịa nke polymerization n'okpuru nrụgide dị ala n'okpuru catalysis nke Ziegler catalyst, ya mere a na-akpọkwa polyethylene njupụta dị elu.

Uru:

HDPE bụ ụdị resin thermoplastic nwere nnukwu crystallinity na enweghị polarity nke e guzobere site na copolymerization nke ethylene.Ọdịdị nke HDPE mbụ ahụ bụ mmiri ara ehi na-acha ọcha, ọ na-atụgharịkwa ruo n'ókè ụfọdụ na akụkụ dị mkpa.Ọ nwere ezigbo nguzogide n'ọtụtụ kemịkalụ ụlọ na ụlọ ọrụ mmepụta ihe, ọ nwekwara ike iguzogide corrosion na mgbasa nke oxidants siri ike (ntụpọ nitric acid), salts-base salts and organic solvents (carbon tetrachloride).Na polima bụ na-abụghị hygroscopic na nwere ezigbo mmiri vepo resistance na ike ji mee ihe maka mmiri na seepage iguzogide.

Enweghị mkpirisi:

Ihe ọghọm ya bụ na nguzogide ya ịka nká na mgbawa gburugburu ebe obibi adịghị mma dị ka LDPE, karịsịa thermal oxidation ga-ebelata arụmọrụ ya, ya mere HDPE na-agbakwụnye antioxidants na UV absorbers mgbe a na-eme ya na mkpuchi rọba iji meziwanye arụmọrụ ya.adịghị ike.

2. Obere njupụta polyethylene (LDPE)

LDPE anaghị egbu egbu, enweghị ụtọ na isi adịghị, yana njupụta nke 0.910-0.940g/cm3.Ọ bụ polymerized na oxygen ma ọ bụ organic peroxide dị ka ihe na-akpali akpali n'okpuru nnukwu nrụgide nke 100-300MPa.A na-akpọkwa ya polyethylene dị elu.A na-akpọkarị LDPE dị ka ọkpọkọ PE na ụlọ ọrụ ogbugba mmiri n'ubi.

Uru:

Polyethylene dị obere bụ ụdị resin polyethylene kachasị dị mfe.E jiri ya tụnyere HDPE, kristal ya (55% -65%) na ebe nro (90-100 ℃) dị ala;ọ nwere ezi mgbanwe, extensibility, nghọta, oyi na-eguzogide na processability;ya chemical Ezi nkwụsi ike, acid, alkali na nnu aqueous ngwọta;ezigbo mkpuchi eletrik na ikuku permeability;obere mmiri absorption;mfe ọkụ.Ọ dị nro na okike ma nwee ezigbo extensibility, mkpuchi eletriki, nkwụsi ike nke kemịkalụ, nhazi nhazi na nguzogide okpomọkụ dị ala (nwere ike iguzogide -70 ° C).

Enweghị mkpirisi:

Ihe ọghọm ya bụ na ike ọrụ ya, ihe mgbochi mmiri, ihe mgbochi gas na ihe mgbaze adịghị mma.Ọdịdị molekụla adịghị adịkarị, kristal (55% -65%) dị ala, ebe mgbaze kristal (108-126 ° C) dịkwa ala.Ike ọrụ ya dị ala karịa nke polyethylene dị elu, yana ọnụọgụ enweghị ike ya, nguzogide okpomọkụ na nguzogide ìhè anyanwụ adịghị mma.A na-agbakwunye Antioxidants na UV absorbers iji dozie adịghị ike ya.