Cov Khoom Uas Cov Khoom Siv PVC Cov Khoom Yog Dab Tsi?
Jun 06, 2018
Feature 1: tsis yeem PVC yog ib yam ntawm cov ntaub ntawv yas plhaws tshaj plaws. PVC cov khoom yog cov khoom tsis-crystalline.
Feature 2: Cov ntaub ntawv hauv PVC feem ntau siv nrog stabilizers, lubricants, cov neeg ua haujlwm pabcuam, cov ntaub ntawv xim, poob absorbers thiab lwm yam khoom siv.
Feature 3: PVC khoom muaj non-flammability, siab zog, huab cua ua hauj thiab zoo geometric stability.
Feature 4: PVC muaj zog tsis kam mus rau oxidants, txo cov neeg ua hauj lawm thiab muaj zog acids. Txawm li cas los xij, nws tuaj yeem siv tau cov oxidizing acids uas yog concentrated sulfuric acid thiab concentrated nitric acid thiab tsis haum rau kev sib tsoo nrog cov ntxhuav thiab cov roj carbon dioxide.
Tus Cwj Pwm 5: lub ntsuas kub ntawm PVC yog ib qho tseem ceeb heev rau kev khiav haujlwm thaum lub sijhawm ua haujlwm. Yog tias qhov kev ntsuas no tsis muaj tseeb, qhov teeb meem ntawm cov khoom tsim tawm yuav ua rau.
Feature 6: cov yam ntxwv ntawm cov pa ntawm PVC yog cov neeg pluag heev, thiab nws cov txheej txheem ntau yog nqaim heev. Hauv particular, cov ntaub ntawv nyhav siab PVC molecular nyuab nyuab dua (cov khoom no feem ntau yuav tsum tau lubricated los txhim kho cov yam ntxwv ntawm lub cev), yog li nws yog feem ntau ntawm cov ntaub ntawv tsis tshua muaj roj molecular PVC.
Ntaus 7: lub rhuav tshem ntawm PVC yog qhov tsawg, feem ntau 0.2-0.6%.
Polyvinyl chloride (PVC), Hmong abbreviation ntawm PVC (Polyvinyl chloride), vinyl chloride monomer (vinyl chloride monomer, VCM) xws li tshuaj peroxide, azo compound initiator; Los yog nyob rau hauv qhov kev txiav txim ntawm lub teeb thiab tshav kub polymerized los ntawm lub mechanism ntawm dawb radical polymerization. Vinyl chloride homopolymer thiab yas chloride copolymer hu ua yas chloride resins.
PVC rau amorphous qauv ntawm cov hmoov dawb, branched degree yog me me, tus ciam ntom nti 1.4, iav hloov qhov kub ntawm 77 ~ 90 ℃, 170 ℃ los yog pib pib decompose, stability stability kub thiab teeb, ntev, yuav tsim thiab ua rau cov tshuaj hydrogen chloride, thiab lwm yam kom tsis muaj kauj ruam zoo dua qub, ua rau lub cev, lub cev thiab cov khoom siv dag zog kuj poob sai, yuav tsum muab ntxiv rau hauv daim ntawv thov cov stabilizers thiaj li ua kom muaj kev ruaj ntseg kub thiab lub teeb.
Lub cev nyhav ntawm PVC uas tsim los ntawm kev lag luam yog feem ntau hauv thaj tsam ntawm 50,000 ~ 110,000, uas muaj lub polydispersity loj. Lub cev nyhav molecular nce nrog qhov txo ntawm qhov kub ntawm polymerization. Tsis muaj qhov teeb meem ntawm lub cev, 80 ~ 85 ℃ pib muag, 130 ℃ yog lub xeev viscoelastic, 160 ~ 180 ℃ pib hloov rau qhov khiav ceev; Zoo mechanical zog, tensile lub zog ntawm txog 60MPa, feem zog ntawm 5 ~ 10kJ / m2; Kev ua kom zoo dua qub.
PVC siv los ua lub ntiaj teb cov khoom loj tshaj plaws ntawm universal plastics, daim ntawv thov ntawm ntau hom kev siv. Cov khoom siv, khoom tsim, khoom siv niaj hnub, yas flooring, pem teb pobzeb, cov khoom tawv tawv, yeeb nkab, xov hlau, hlau, ntim zaj duab xis, lub raj mis, cov khoom ntim, cov ntaub ntim cov khoom, fiber, thiab lwm yam.