Hloov Polyethylene yog dab tsi?
Hloov Polyethylene yog dab tsi?
Kev hloov kho ntau yam ntawm polyethylene feem ntau suav nrog chlorinated polyethylene, chlorosulfonated polyethylene, cross-linked polyethylene thiab cov khoom sib xyaw ua ke.
Chlorinated Polyethylene:
Ib qho random chloride tau los ntawm ib nrab hloov hydrogen atoms hauv polyethylene nrog chlorine. Chlorination yog nqa tawm raws li qhov pib ntawm lub teeb lossis peroxide, thiab feem ntau yog tsim los ntawm aqueous suspension method hauv kev lag luam. Vim tias qhov sib txawv ntawm qhov hnyav thiab kev faib tawm, kev kawm qib siab, chlorination degree tom qab chlorination, chlorine atom faib thiab residual crystallinity ntawm raw polyethylene, chlorinated polyethylene los ntawm rubbery mus rau cov yas tuaj yeem tau. Kev siv tseem ceeb yog kev hloov pauv ntawm polyvinyl chloride los txhim kho qhov cuam tshuam ntawm polyvinyl chloride. Chlorinated polyethylene nws tus kheej kuj tuaj yeem siv los ua cov khoom siv hluav taws xob thiab cov khoom siv hauv av.
Chlorosulfonated polyethylene:
Thaum polyethylene reacts nrog chlorine uas muaj sulfur dioxide, ib feem ntawm hydrogen atoms nyob rau hauv lub molecule yog hloov los ntawm chlorine thiab ib tug me me ntawm sulfonyl chloride pawg kom tau chlorosulfonated polyethylene. Txoj kev lag luam tseem ceeb yog txoj kev raug ncua. Chlorosulfonated polyethylene yog resistant rau ozone, tshuaj corrosion, roj, tshav kub, lub teeb, puas thiab tensile zog. Nws yog ib qho elastomer nrog cov khoom zoo thiab tuaj yeem siv los ua cov khoom siv uas tiv tauj cov khoom noj.
XLPE:
Siv txoj kev hluav taws xob (X-ray, hluav taws xob hluav taws xob lossis ultraviolet irradiation, thiab lwm yam) los yog cov txheej txheem tshuaj (peroxide los yog silicone cross-linking) los ua cov kab polyethylene rau hauv lub network lossis cov khoom sib txuas ntawm polyethylene. Ntawm lawv, silicone cross-linking txoj kev muaj cov txheej txheem yooj yim, cov nqi khiav lag luam tsawg, thiab cov molding thiab cross-linking tuaj yeem ua tau raws li cov kauj ruam, yog li tshuab molding thiab txhaj tshuaj molding yog tsim nyog. Lub tshav kub tsis kam, ib puag ncig kev nyuaj siab cracking kuj thiab txhua yam khoom ntawm cross-linked polyethylene tau zoo heev piv nrog polyethylene, thiab nws yog haum rau loj kav, cables thiab nyob ntawm tej, thiab rotomolding khoom.
Kev sib xyaw ua ke ntawm polyethylene:
Tom qab sib tov linear low density polyethylene thiab low density polyethylene, nws tuaj yeem siv los ua cov yeeb yaj kiab thiab lwm yam khoom, thiab cov khoom ua tau zoo dua li qhov ntom ntom polyethylene. Polyethylene thiab ethylene propylene roj hmab tuaj yeem sib xyaw kom tsim tau ntau yam thermoplastic elastomers