Polyvinyl chloride (PVC), uas yog ib qho ntawm cov khoom siv dav dav tshaj plaws - lub hom phiaj plastics thoob ntiaj teb, tshuav nqi ntau ntawm nws cov khoom ua tau zoo thiab siv tau rau kev teeb tsa kev tshawb fawb ntawm nws cov txheej txheem additives.PVC additives tsis yog tsuas yog tsim nyog los them nyiaj rau cov khoom tsis xws luag, tab sis kuj tseem ceeb heev rau kev txhim kho tag nrho cov ntaub ntawv xav tau kev pab, thiab kev sib ntsib {2 bonus}, thiab kev sib ntsib kev tsim khoom. Lawv tus nqi permeates tag nrho cov kev lag luam saw, los ntawm formulation tsim thiab ua rau kev lag luam daim ntawv thov.
Ua ntej, PVC additives ho txhim kho cov resin ua adaptability. Pure PVC resin raug kev txom nyem los ntawm cov thermal stability, siab yaj viscosity, thiab tsis sib xws plasticization. Kev ua haujlwm ncaj qha tuaj yeem yooj yim ua rau decomposition, discoloration, deg tsis xws luag, thiab txawm tias cov khoom puas. Thaum tshav kub kub stabilizers tuaj yeem cuam tshuam cov tshuaj tiv thaiv dehydrochlorination tam sim ntawd thaum ua, ua kom muaj kev ruaj ntseg ntawm kev tsim khoom tas mus li; Cov khoom siv ua haujlwm tuaj yeem txo cov viscosity yaj, txhim kho flowability, thiab tshem tawm cov teeb meem xws li extrusion sharkskin marks, yog li txhim kho kev tsim khoom thiab cov khoom zoo nkauj. Qhov kev ua tau zoo no ua rau txo qis kev siv hluav taws xob ntau thiab cov khoom seem, txuag cov nqi tsim khoom thiab nce kev siv lub peev xwm rau cov lag luam.
Thib ob, cov khoom siv ntxiv nthuav dav thaj tsam kev ua haujlwm ntawm PVC, ua tau raws li qhov xav tau sib txawv ntawm ntau qhov chaw. Kev taw qhia txog kev hloov pauv cuam tshuam endows tawv tawv PVC nrog zoo heev cuam tshuam toughness, ua rau nws muaj kev txhim khu kev qha cov khoom siv hauv cov khoom siv xws li qhov rooj thiab qhov rais profiles, kav dej, thiab cov ntawv txheeb. Plasticizers muab cov kev hloov pauv tau zoo thiab kev tiv thaiv txias rau PVC hloov tau, tso cai rau nws siv dav hauv cov yeeb yaj kiab, cable sheaths, khoom siv kho mob, thiab cov khoom siv niaj hnub. Kev sib xyaw ua ke ntawm kev siv lub teeb stabilizers thiab cov tshuaj tua kab mob antioxidant tau txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv sab nraum zoov thiab cov khoom siv tsheb, txo cov nqi kho thiab hloov cov nqi. Cov nplaim hluav taws kub hnyiab, cov pa taws tua hluav taws, thiab lwm yam khoom siv ntxiv txhim kho qib kev nyab xeeb ntawm cov khoom hauv hluav taws xob, kev tsim kho, thiab kev thauj mus los, nthuav dav siv PVC hauv pej xeem kev nyab xeeb thiab siab - ib puag ncig kev pheej hmoo.
Tsis tas li ntawd, PVC additives ua lub luag haujlwm tseem ceeb hauv kev ua tiav kev tsim ntsuab thiab kev tsim kho kom ruaj khov. Cov tshuaj stabilizers uas muaj cov hlau hnyav xws li txhuas thiab cadmium hauv cov qauv tshuaj ib txwm tau maj mam hloov los ntawm calcium-zinc composite stabilizers thiab organic stabilizers. Tsawg-toxicity, qis-volatility, thiab biodegradable plasticizers tau txhawb nqa tsis tu ncua, txo kev puas tsuaj rau tib neeg kev noj qab haus huv thiab ib puag ncig thaum tsim khoom thiab siv. Lub caij no, siab -cov khoom siv tau zoo tuaj yeem ua kom zoo dua chav tsev ntawm PVC resin hauv formulations. Ua ke nrog cov khoom siv rov ua dua tshiab, qhov no yuav pab txo qis cov khoom siv raw thiab cov pa roj carbon emissions, ua raws li cov kev taw qhia ntawm kev lag luam ncig thiab qis - carbon kev loj hlob.
Tsis tas li ntawd, cov khoom siv ntxiv tsim cov xwm txheej rau kev ua haujlwm thiab siab -tus nqi- ntxiv ua cov khoom siv PVC. Los ntawm kev kho cov proportions thiab hom sib txawv additives, tshwj xeeb functions xws li tshuaj tua kab mob, antistatic, roj -resistant, thiab siab -pob tshab yuav ua tau tiav, ua tau raws li qhov yuav tsum tau nruj me ntsis ntawm cov tshiab teb xws li kev kho mob, electronics, thiab high{5}}kawg ntim. Qhov kev ua tau zoo no muaj peev xwm kho tau los ntawm cov khoom siv ntxiv ua rau PVC hloov pauv los ntawm qhov qis - cov khoom siv kim heev rau kev ua haujlwm siab - kev ua tau zoo, cov khoom lag luam tshwj xeeb, txhim kho kev lag luam kev sib tw thiab cov nyiaj tau los.
Nyob rau hauv cov ntsiab lus, tus nqi ntawm PVC additives dag tsis tau tsuas yog nyob rau hauv hais txog cov shortcomings nyob rau hauv resin ua thiab daim ntawv thov, tab sis kuj nyob rau hauv kev txhaj tshuaj ruaj khov zog mus rau hauv lub PVC kev lag luam los ntawm kev ua tau zoo, daim ntawv thov expansion, ntsuab transformation, thiab functional innovation. Kev xaiv kev tshawb fawb thiab kev ua kom zoo ntawm cov khoom siv ntxiv tau dhau los ua kev ntsuas kev lag luam kom tau txais txiaj ntsig zoo, tus nqi, thiab ib puag ncig zoo hauv kev sib tw ua lag luam hnyav, thiab tseem yog ib qho kev txhawb nqa tseem ceeb rau kev ua tiav qib siab - kev txhim kho zoo thiab ruaj khov ntawm cov ntaub ntawv PVC hauv lub sijhawm tshiab.