Polyvinyl chloride kuj tseem yog siv cov yas siv. Nws yog cov ntawv suav ua cov polyvinyl chloride cob, yas ua kom zoo nkauj thiab cov antioxidant, thiab tsis muaj tshuaj lom los ntawm nws tus kheej. Txawm li cas los xij, cov khoom siv tseem ceeb xws li plasticizers thiab cov neeg ua haujlwm tiv thaiv kev laus ntxiv, thiab cov yas hauv cov neeg niaj hnub siv polyvinyl chloride plastics feem ntau siv dibutyl terephthalate thiab dioctyl phthalate. Cov tshuaj no feem ntau yog siv. Ob leeg puav leej muaj tshuaj lom, thiab cov txhuas acid stearate ntawm polyvinyl chloride kuj yog lom. Cov tshuaj txhuas ntsev uas muaj cov tshuaj polyvinyl chloride (PVC) nyob rau hauv kev sib cuag nrog ethanol, ether thiab lwm cov kuab tshuaj yuav ua rau cov txhuas ua kom tsis haum. Thaum cov tshuaj txhuas uas muaj cov tshuaj polyvinyl chloride siv los ua cov ntim khoom noj thiab muaj cov khoom noj fritters, cov kib kib, kib ntses, cov nqaij ua zaub mov, thiab cov khoom noj khoom qab zib, cov lwg me me uas siv lead ua yuav tawm mus rau hauv cov roj, kom cov hnab yas PVC tsis tuaj yeem siv. Cov zaub mov, tshwj xeeb cov khoom noj muaj roj. Tsis tas li ntawd, polyvinyl chloride yas khoom yuav maj mam decompose hydrogen chloride roj nyob rau qhov kub thiab txias, xws li kwv yees li 50 ° C. Cov roj no muaj teeb meem rau tib neeg lub cev, yog li PVC cov khoom lag luam yuav tsum tsis txhob siv cov ntim khoom noj.
Polyvinyl chloride kuj tseem yog siv cov yas siv. Nws yog cov ntawv suav ua cov polyvinyl chloride cob, yas ua kom zoo nkauj thiab cov antioxidant, thiab tsis muaj tshuaj lom los ntawm nws tus kheej. Txawm li cas los xij, cov khoom siv tseem ceeb xws li plasticizers thiab cov neeg ua haujlwm tiv thaiv kev laus ntxiv, thiab cov yas hauv cov neeg niaj hnub siv polyvinyl chloride plastics feem ntau siv dibutyl terephthalate thiab dioctyl phthalate. Cov tshuaj no feem ntau yog siv. Ob leeg puav leej muaj tshuaj lom, thiab cov txhuas acid stearate ntawm polyvinyl chloride kuj yog lom. Cov Khoom Txhuas (Pvc) cov khoom uas muaj cov tshuaj tiv thaiv ntsev txhuas cov tshuaj tiv thaiv ua rau muaj hmoov txhuas los ntawm kev sib cuag nrog ethanol, ether thiab lwm cov kuab tshuaj. Thaum cov tshuaj txhuas uas muaj cov tshuaj polyvinyl chloride siv los ua cov ntim khoom noj thiab muaj cov khoom noj fritters, cov kib kib, kib ntses, cov nqaij ua zaub mov, thiab cov khoom noj khoom qab zib, cov lwg me me uas siv lead ua yuav tawm mus rau hauv cov roj, kom cov hnab yas PVC tsis tuaj yeem siv. Cov zaub mov, tshwj xeeb cov khoom noj muaj roj.
Polyvinyl chloride yas khoom yas yuav maj mam decompose hydrogen chloride roj ntawm qhov kub thiab txias, xws li 50 degrees. Cov roj no muaj teeb meem rau tib neeg lub cev, yog li cov tshuaj polyvinyl chloride yuav tsum tsis txhob siv cov ntim khoom noj. Bakelite (yas phenolic) muaj cov phenol dawb thiab formaldehyde, uas ua teeb meem rau tib neeg lub cev thiab tsis tsim nyog rau khaws khoom noj thiab ntim rau khoom noj. Txawm hais tias hluav taws xob jade (urinary aldehyde yas) tsis muaj ntxhiab thiab tsis qab, nws tuaj yeem ua rau hauv 100-dej npau npau lossis siv los ua cov kua qaub-vinegar, uas muaj teeb meem rau tib neeg lub cev, yog li nws tsis haum rau cov zaub mov lossis ntim khoom noj. Rov ua dua tshiab ntawm cov pa roj khib nyiab (qee tus yuav ntxiv me ntsis cov khoom tshiab), vim tias lawv cov khoom sib xyaw ua ke, nws tsis yooj yim kom ntseeg tau tias lawv tsis muaj tshuaj lom, yog li lawv feem ntau tsis siv los ua cov thawv ntim khoom noj thiab ntim khoom.
