PVC Tube yog cov tsis muaj kuab lom

PVC cov khoom tsis yog lom, pvc cov ntaub ntawv yog raws li polyvinyl chloride, ntxiv lwm txoj hnyav hnyav, yooj yooj yim thiab muaj zog tshuaj sib tov sib xyaw ntawm cov khoom. Nws muaj ntau yam ntaub ntawv yeej tsis muaj qhov zoo, tab sis kuj tseem tsis tshua muaj nqi thiab nrhiav kev pheej yig pab neeg. Nws tseem yog cov ntaub ntawv tshaj tawm thoob ntiaj teb, kev siv ntawm ntau thaj chaw.

Peb txhua tus paub hais tias cov khoom noj khoom lag luam tam sim no siv rau cov khoom siv yas, cov khoom siv hauv tsev hauv tsev tsim kho yuav muab faib ua pvc thiab pvc pvc ob, qhov txawv no yog los ntawm cov khoom pvc ntxiv rau cov muag muag . Raws li lub npe pom zoo, cov pvc muag muag yog ib tug softener, yog li cov khoom siv yooj yim rau cov duab, tsis txhav thiab tsis muaj cov tshuaj lom neeg thiab cov uas tsis ua haujlwm. Cov khoom siv pvc nyuaj yuav tsum tsis pub dawb thiab yooj yim rau txhawm thiab tsis yooj yim rau txuag tau qhov tsis txaus.

Polyvinyl chloride (xa mus rau: PVC) yog siv cov tshuaj chlorine los hloov polyethylene nyob rau hauv ib qho hydrogen atom ntawm cov khoom polymer. PVC rau amorphous qauv ntawm dawb hmoov, lub degree ntawm branching yog me me. Muaj ntau lawm ntawm PVC molecular qhov hnyav yog feem ntau nyob rau hauv qhov ntau ntawm 5 mus rau 12 lab, nrog ib tus polydispersity loj loj, molecular hnyav nce nrog rau qhov yuav txo tau qhov kub ntawm polymerization. Tsis muaj qhov teeb meem ntawm qhov pib, 80 ~ 85 ℃ pib muag, 130 ℃ mus rau hauv lub xeev khov, 160 ~ 180 ℃ pib hloov mus rau qhov khiav ceev. Lub zog tensile ntawm 60MPa, qhov feem zog ntawm 5 ~ 10kJ / m2; muaj cov khoom siv zoo heev. Kev ruaj ntseg ntawm lub teeb thiab kub yog tsis zoo, tshaj 100 ℃ los yog lub hnub ntev raug, nws yuav decompose thiab tsim hydrogen chloride, thiab automatic catalytic decomposition los ntawm discoloration, nyob rau hauv daim ntaub ntawv yuav tsum tau ntxiv stabilizer los txhim kho stability ntawm kub thiab lub teeb. PVC yog ib qho nyuaj, tsuas yog muaj peev xwm yuav yaj hauv cyclohexanone, dichloroethane thiab tetrahydrofuran thiab ob peb cov kuab tshuaj, organic thiab inorganic acids, alkali, ntsev ruaj khov, tshuaj stability nrog kev siv kub nce.