PVC, PE, PP thiab PS yog cov cuab yeej dav dav. Cov yam ntxwv ntawm cov yas yog txiav txim los ntawm nws cov tshuaj muaj pes tsawg leeg thiab hom ntawm cov qauv molecular (molecular tag: crystalline / amorphous structure)
PVC muaj ib qho qauv amorphous nrog cov roj carbon atom nyob hauv molecular qauv. Muaj chlorine atoms thiab cov qauv kev ua qauv zoo nkauj yog cov uas muaj feem xyuam. Txawm hais tias plastics zoo li zoo sib xws nyob rau hauv lub ntsiab lus ntawm txhua hnub siv, PVC muaj txhua nrho txawv txav raws li cov kev ua tau zoo thiab kev ua piv txwv nrog olefin plastics uas muaj tsuas carbon thiab hydrogen atoms nyob rau hauv lawv cov qauv molecular. 
Tshuaj stability yog ib qho ntawm cov khoom uas muaj halogens xws li chlorine thiab fluorine. Qhov no siv rau PVC resins, uas tseem muaj hluav taws kub nyhiab, lub zog, thiab roj / tshuaj ua haujlwm.
Hluav Taws Kub Cuam Ntxiv
PVC tau tshaj hluav taws kub retarding zog vim nws cov ntsiab lus chlorine, txawm tias thaum tsis muaj hluav taws kub retardants. Piv txwv, qhov kub xaim hluav taws kub ntawm PVC yog siab li 455 ° C, thiab yog ib yam khoom uas muaj feem tsawg dua rau cov teeb meem hluav taws vim nws tsis yog yooj yim ignited 
Tsis tas li ntawd, lub tshav kub tso tawm hauv qhovcub yog txo qis dua nrog PVC, thaum muab piv rau cov neeg PE thiab PP. PVC thiaj li muab tsawg dua los kis hluav taws rau cov khoom nyob ze txawm tias thaum hlawv.
Yog li ntawd, PVC yog qhov haum rau kev ruaj ntseg hauv cov khoom ze rau tib neeg lub neej txhua hnub.
Durability
Nyob rau hauv ib txwm ua ntawm kev siv, qhov zoo tshaj plaws feem ntau ntseeg tau lub durability ntawm ib cov khoom yog tsis kam mus oxidation los ntawm atmospheric oxygen. PVC, muaj cov qauv molecular twg cov chlorine atom yog khi rau txhua lwm cov saw saw, yog heev resistant rau oxidative tshua, thiab tswj nws cov kev kawm rau ib lub sij hawm ntev. Lwm cov ntsiab lus ntawm cov khoom siv nrog cov khoom ua los ntawm cov pa roj carbon thiab hydrogen muaj ntau dua qhov qub txav deb ntawm oxidation hauv kev siv ntau yam (xws li, piv txwv li, los ntawm rov ua dua qub). Kev ntsuas ntawm cov av nyob hauv av 35 xyoo hauv PVC kav dej los ntawm Nyiv PVC Yeeb Nkab & Fittings Association pom tsis muaj kev txhawj xeeb thiab tib lub zog tshiab tshiab kav
Kev tshawb fawb hauv Tebchaws Yelemees (60 Jahre Erfahrungen mit Rohrleitungen aus Weichmachfreiem PVC, 1995, KRV) tau pom tias cov av faus hauv cov av tau khawb tom qab 60 xyoo ntawm kev siv thaum tshawb fawb tau pom zoo kom tsim nyog thiab tsim nyog kom muaj lub neej ntev txog 50 xyoo! Yuav luag tsis muaj kev puas tsuaj raug cai thaum rov qab los ntawm peb lub tsheb ntawm cov khoom siv sab nrauv (PVC yob siv cov yas yas) tom qab 13 xyoo siv thiab thaum sib piv ntawm lub cev cov khoom tshiab nrog cov khoom tshiab. 
Lub sijhawm luv luv rau thermal decomposition yog vim muaj cov keeb kwm kub nyob rau hauv txoj kev rov hloov dua siab tshiab, thiab tuaj yeem rov qab mus rau ntawm cov khoom qub los ntawm kev ntxiv stabilizers. Cov khoom rov qab tau tuaj yeem txum tim siv rau tib yam khoom los ntawm rov hloov dua tshiab, tsis hais seb lawv yog cov kav dej lossis tsheb qhov twg. Lub zog ntawm cov khoom siv rov hloov dua tshiab no zoo ib yam li cov khoom uas tau ua los ntawm cov nkauj tshiab, thiab tseem tsis muaj teeb meem rau kev siv.
Roj / Tshuaj lom neeg kuj
PVC yog resistant to acid, alkali thiab yuav luag txhua cov tshuaj inorganic. Txawm hais tias PVC swells los yog dissolves nyob rau hauv cov ntxhuav, cov ketones, thiab cyclic ethers, PVC nyuaj rau yaj mus rau lwm cov organic solvents. Ua kom zoo dua ntawm qhov yeeb yam no, PVC yog siv rau hauv cov pa roj carbon ducts, nplooj ntawv siv hauv tsev, fwj, tub thiab hoses.
Mechanical stability
PVC yog ib hom tshuaj sib txig, uas qhia me ntsis hauv cov qauv hauv molecular, thiab kuj tuaj yeem hloov me ntsis hauv nws qhov kev dag zog. Txawm li cas los, ntev saw polymers yog viscoelastic cov ntaub ntawv thiab yuav ua tau deformed los ntawm daim ntawv thov kev nruam sab nraud, txawm tias cov ntaub ntawv quab yuam yog zoo hauv qab lawv cov qhab nia tawm los. Qhov no hu ua creep deformation. Txawm hais tias PVC yog ib yam khoom siv viscoelastic, nws lub cev deformation tseem tsawg heev nrog rau lwm yam uas yog vim lim ntshav tsis zoo rau kev coj noj coj ua hauv qhov kub, hauv qhov sib piv rau PE thiab PP, uas muaj ntau dua cov lus tsa suab hauv lawv cov khoob zoo.
Ib tug European txoj kev tshawb fawb ntawm cov nkev PVC thaum ntxov - uas ua los ntawm xyoo 1930 los 
Xyoo 1950 - qhia txog kev ua haujlwm txog 50 xyoo thiab kev ua haujlwm zoo heev (T Hulsmann, European Vinyls Corporation, thiab R Novak ALPHACAN Omniplast GmbH). Ntau cov voos PVC niaj hnub xav kom kav ntev dua - tej zaum nce los yog dhau ntawm 100 xyoo. Source:
"PVC thiab ib puag ncig teeb meem" los ntawm Tetsuya Makino, Seikei Kakou (phau ntawv xov xwm ntawm Nyiv Pej Xeem ntawm Polymer Processing), Vol.10, No.1 (1998)
Cov txheej txheem thiab mouldability
Cov txheej txheem ntawm cov khoom siv thermoplastic nyob ntawm seb nws cov tawv viscosity. PVC yog tsis haum rau kev txhaj tshuaj molding ntawm loj cov khoom, txij li nws cov viscosity yaj yog nce siab. Ntawm qhov tod tes, tus cwj pwm viscoelastic ntawm molten PVC nws tsis tshua kub dua thiab ruaj khov. Yog li no, PVC yog tsim rau txoj hauv kev ua kom zoo li lub tshuab ua haujlwm (xws li, cov ntaub ntawv vaj tse), thiab cov duab thaij thiab cov ntawv txheeb (xws li, cov duab ua lag luam thiab PVC tawv).
Qhov chaw sab nraud ntawm PVC cov khoom zoo heev, thiab tso saib kev ua haujlwm zoo tshaj plaws - nthuav dav ntau yam kev kho mob nrog textures xws li cov ntaub qhwv to ntawm lub ncuav hniav kom mus rau qhov de-lustred suede. Txij li thaum PVC yog ib qho amorphous yas nrog tsis hloov theem, molded PVC cov khoom muaj qhov siab qhov tseeb. PVC tseem tuaj yeem ua tau zoo ntawm kev ua haujlwm nyob hauv txoj hlua khi, vuam, kev sib txuas ntev, thiab ua lub tshuab nqus tsev, thiab ua haujlwm ntawm qhov chaw ua haujlwm.
Muab tshuaj txhuam ua zauv xws li txhuam molding, npo luam tawm thiab txheej txheej yog ib qho yooj yim ua cov tswv yim uas ua tau nrog PVC xwb.
Cov txheej txheem ua no yog siv ua flooring, phab ntsa, cov sealants thiab cov khov kho.
Lwm cov khoom uas ua rau PVC ntau yam
PVC muaj polar pawg (chlorine), thiab yog amorphous, yog li sib xyaw zoo nrog ntau lwm yam tshuaj. Cov khoom uas yuav tsum tau muaj ntawm cov khoom kawg (xws li, yooj, elasticity, impact resistance, anti-fouling, kev tiv thaiv ntawm microbial loj hlob, anti-yawg, hluav taws retarding) yuav dawb tsim los ntawm formulation nrog plasticisers thiab ntau yam additives, modifiers, thiab coloring agents . PVC yog tsuas pub lub hom phiaj nkaus xwb uas pub dawb, dav thiab seamless kev hloov ntawm cov khoom yuav tsum muaj ntawm cov khoom xws li ua kom yooj yim, elasticity, thiab tej yam ua haujlwm, los ntawm kev ntxiv cov yas yas, cov khoom ntxiv, thiab cov khoom hloov kho. 
Vim tias cov khoom siv ntawm cov khoom kawg tau hloov kho los ntawm kev siv cov khoom siv ntxiv, tsuas yog ob peb hom tshuaj siv xwb yuav tsum tau them tag nrho cov kev siv (fiber ntau, nruj thiab flexible yas, roj hmab, xim, thiab nplaum). Qhov kev saib xyuas no kuj tsis tshua muaj txiaj ntsim zoo dua rau kev ua ub no.
Chart_14WEB
Cov txheej txheem ncov qaumteb qabteb hauv PVC ua rau kom yooj yim ntawm cov xim, luam tawm thiab ua tiav. PVC cov khoom tsis yuav tsum tau ua ntej kev kho mob, uas ua rau muaj ntau yam qauv tsim. PVC yog siv ntau daim ntaub ntawv zoo nkauj los ua kom zoo dua ntawm nws qhov kev luam tawm zoo, kev ruaj ntseg ntawm qhov hluav taws xob thiab cov huab cua. Yam ntxwv xws li ntoo pob txha, pob zeb ci pob zeb, thiab cov xim hlau yog ua tau. Cov qauv kev pom muaj xws li phab ntsa thiab cov ntaub pua tsev, khoom vaj tse, rooj tog, khoom siv hluav taws xob hauv tsev, lossis cov phiajcim thiab cov ntawv tawm hauv cov dav hlau, tsheb nqaj hlau, tsheb thauj mus los thiab tsheb nqaj hlau.
