Polyethylene kuj yog ib qho khoom siv feem ntau siv rau cov hnab ntim khoom. Nov yog qee cov yam ntxwv ntawm polyethylene.
1. Cov yam ntxwv dav dav. Polyethylene resin yog non-toxic, tasteless dawb hmoov los yog hais, nws cov tsos yog milky dawb thiab muaj dej tsawg. Cov yeeb yaj kiab polyethylene yog pob tshab thiab txo qis nrog kev nce ntawm crystallinity. Cov dej permeability ntawm polyethylene zaj duab xis yog tsawg, tab sis cov huab cua permeability yog loj, thiab nws tsis yog haum rau tshiab-kub ntim, tab sis rau cov dej-pov thawj ntim. Flammable, tsis tshua muaj pa luam yeeb thaum hlawv, ib tug me me ntawm molten te, daj nplaim nyob rau hauv xiav, paraffin tsw. Polyethylene muaj kev tiv thaiv dej zoo dua.
2. Mechanical zog. Cov khoom siv kho tshuab ntawm polyethylene yog dav dav, lub zog tensile tsawg, kev nkag siab tsis zoo, thiab kev cuam tshuam tsis zoo. Nws yog feem ntau cuam tshuam los ntawm qhov ntom ntom, crystallinity, thiab qhov hnyav molecular txheeb ze, thiab nws cov khoom siv tshuab nce ntxiv nrog qhov nce ntawm cov ntsuas no.
3. Cov yam ntxwv ntawm hluav taws xob. Vim hais tias polyethylene tsis yog-polar, nws muaj cov khoom siv hluav taws xob zoo heev uas tsis muaj dielectric poob thiab lub zog dielectric siab, uas yog, nws tuaj yeem siv los ua cov khoom siv hluav taws xob ntau zaus, cov yas tiv thaiv kab mob, thiab cov khoom siv hluav taws xob siab.
4. Cov yam ntxwv ib puag ncig. Polyethylene yog ib qho alkane-inert polymer nrog kev ruaj ntseg tshuaj zoo. Nyob rau hauv chav tsev kub resistant rau acid, alkali, ntsev aqueous corrosion, tab sis tsis resistant rau muaj zog oxidants xws li fuming sulfuric acid, concentrated nitric acid, thiab chromic acid.
5. Cov yam ntxwv ua haujlwm. Vim qhov zoo fluidity ntawm LDPE thiab HDPE, tsis tshua muaj kub ua, nruab nrab viscosity, tsis tshua muaj decomposition kub, thiab siab kub nyob rau hauv lub inert gas tsis decompose, yog li nws yog ib tug yas uas muaj kev ua tau zoo.
Lub hnab ntim khoom yog yooj yim rau kev thauj khoom ntau cov ntaub ntawv, nrog lub ntim loj, lub teeb yuag, yooj yim thauj khoom thiab tshem tawm, thiab lwm yam. Kev siv dav hauv Suav teb tau nthuav dav, thiab kev xa tawm cov hnab tshwj xeeb xws li calcium carbide thiab cov khoom ntxhia kuj nce ntxiv. Yog li ntawd, kev lag luam xav tau rau cov khoom ntim khoom muaj peev xwm zoo thiab cov kev cia siab ntawm kev loj hlob yog qhov dav heev.
