Cov yam tseem ceeb uas cuam tshuam rau qhov zoo ntawm cov khoom siv pab ua cov khoom siv yog dab tsi?

1. Tus lej viscosity
Tus lej viscosity qhia txog qhov nruab nrab molecular hnyav ntawm cov resin thiab yog tus yam ntxwv tseem ceeb rau kev txiav txim siab hom resin. Cov khoom thiab kev siv ntawm cov resin sib txawv nyob ntawm qhov viscosity. Raws li qib ntawm polymerization ntawm PVC resin nce, cov khoom siv kho tshuab xws li tensile lub zog, lub zog cuam tshuam, lub zog tawg, thiab elongation ntawm tawg nce, thaum lub zog tawm los txo qis. Cov txiaj ntsig kev tshawb fawb qhia tau hais tias raws li qib ntawm polymerization ntawm PVC ua cov khoom pab nce, cov khoom yooj yim ntawm cov resin txhim kho, thaum kev ua haujlwm thiab rheological tus cwj pwm poob qis. Nws tuaj yeem pom tias qhov hnyav molecular faib ntawm PVC resin muaj kev sib raug zoo nrog kev ua yas thiab kev ua haujlwm ntawm cov khoom.
2. Kev suav cov khoom me me uas tsis huv (cov xim dub thiab daj)
Cov khoom me me uas tsis huv yog ib qho ntawm cov cim qhia tseem ceeb rau kev ntsuam xyuas cov tshuaj PVC. Cov yam tseem ceeb uas cuam tshuam rau qhov cim qhia no yog: thawj zaug, cov khoom seem ntawm phab ntsa txheej ntawm lub lauj kaub polymerization tsis tau ntxuav kom huv si thiab cov khoom siv raw muaj cov khoom tsis huv; qhov thib ob, kev hnav khaub ncaws sib xyaw nrog cov khoom tsis huv thiab kev ua haujlwm tsis raug coj cov khoom tsis huv; Hauv cov txheej txheem ntawm kev ua yas, yog tias muaj ntau cov khoom tsis huv, nws yuav muaj kev cuam tshuam tsis zoo rau kev ua haujlwm thiab kev siv cov khoom PVC tsim tawm. Piv txwv li, hauv kev ua thiab kev ua cov duab ntawm cov profile, muaj ntau cov khoom tsis huv thiab cov khoom me me, uas tuaj yeem ua rau muaj cov pob tshwm sim ntawm qhov chaw ntawm cov profile, yog li txo qhov tshwm sim ntawm cov khoom. Tsis tas li ntawd, vim yog cov khoom tsis huv tsis tau yas lossis lub zog qis txawm tias yas, cov khoom siv kho tshuab ntawm cov khoom raug txo qis.
3. Cov khoom uas yaj tau (xws li dej)
Qhov ntsuas no qhia txog qhov hnyav ntawm cov resin tom qab raug cua sov ntawm qee qhov kub. Cov ntsiab lus tsawg ntawm cov khoom tsis ruaj khov tuaj yeem tsim hluav taws xob zoo li qub, uas tsis zoo rau kev pub mis thaum lub sijhawm ua thiab molding; Yog tias cov ntsiab lus tsis ruaj khov siab dhau, cov resin yuav yooj yim clumping thiab tsis muaj zog, thiab cov npuas dej yooj yim tsim thaum lub sijhawm molding thiab kev ua, uas muaj kev cuam tshuam tsis zoo rau cov khoom zoo.
4. Qhov pom tseeb ceev
Qhov pom tseeb yog qhov hnyav ib chav ntim ntawm PVC resin hmoov uas tsis muaj kev sib xyaw. Nws muaj feem cuam tshuam nrog cov qauv ntawm cov khoom me me, qhov nruab nrab ntawm cov khoom me me, thiab qhov faib ntawm cov khoom me me ntawm cov resin. Qhov pom tseeb qis, ntim loj, nqus tau sai ntawm cov plasticizers, thiab yooj yim ua. Ntawm qhov tsis sib xws, qhov nruab nrab ntawm cov khoom me me thiab ntim me me ua rau kev nqus ntawm cov khoom pab ua PVC. Rau kev tsim cov khoom tawv, qhov xav tau qhov hnyav molecular tsis siab, thiab cov plasticizers feem ntau tsis ntxiv thaum lub sijhawm ua. Yog li ntawd, qhov porosity ntawm cov khoom me me resin yuav tsum qis dua, tab sis muaj qhov xav tau rau cov dej qhuav ntawm cov resin, yog li qhov pom tseeb ntawm cov resin yog siab dua.
5. Kev nqus cov khoom yas ntawm cov tshuaj
Qhov nqus ntawm cov khoom siv ua PVC qhia txog qib ntawm cov qhov hauv cov khoom siv resin, nrog rau qhov nqus roj ntau thiab porosity loj. Cov resin nqus cov plasticizers sai thiab muaj kev ua haujlwm zoo. Rau extrusion molding (xws li profiles), txawm hais tias qhov xav tau rau cov resin porosity tsis siab dhau, cov qhov hauv cov khoom siv muaj cov nyhuv adsorption zoo rau kev ntxiv cov khoom ntxiv thaum lub sijhawm ua, txhawb kev ua haujlwm ntawm cov khoom ntxiv.
6. Kev dawb
Qhov dawb qhia txog qhov tsos thiab xim ntawm cov resin, nrog rau qhov kev puas tsuaj los ntawm kev ruaj khov thermal tsis zoo lossis lub sijhawm khaws cia ntev, ua rau qhov dawb txo qis. Qib ntawm qhov dawb muaj feem cuam tshuam loj heev rau kev tiv thaiv kev laus ntawm cov ntoo thiab cov khoom.
7. Cov ntsiab lus vinyl chloride seem
Cov seem VCM yog hais txog qhov seem ntawm cov resin uas tsis tau adsorbed lossis yaj hauv polyethylene monomer, thiab nws lub peev xwm adsorption sib txawv nyob ntawm hom resin. Hauv cov yam ntxwv VCM residue tiag tiag, cov yam ntxwv tseem ceeb suav nrog qhov kub qis tshaj plaws ntawm lub pej thuam stripping, qhov sib txawv ntawm lub siab ntau dhau hauv lub pej thuam, thiab cov qauv resin tsis zoo, txhua yam uas tuaj yeem cuam tshuam rau VCM residue desorption, uas yog qhov qhia txog kev ntsuas qib kev huv ntawm cov resins. Rau cov khoom tshwj xeeb, xws li cov ntawv ci tin tawv pob tshab hnab ntim rau cov tshuaj kho mob, cov ntsiab lus VCM seem ntawm cov resin tsis yog txog tus qauv (tsawg dua 5PPM).
8. Kev ruaj khov ntawm cua sov
Yog tias cov dej hauv monomer siab dhau, nws yuav tsim cov kua qaub, ua rau cov khoom siv xeb, tsim cov hlau polymerization system, thiab thaum kawg cuam tshuam rau qhov thermal stability ntawm cov khoom. Yog tias hydrogen chloride lossis free chlorine muaj nyob rau hauv monomer, nws yuav muaj cov teebmeem tsis zoo rau cov tshuaj polymerization. Hydrogen chloride yooj yim tsim hauv dej, uas txo qhov pH ntawm lub polymerization system thiab cuam tshuam rau qhov ruaj khov ntawm lub polymerization system. Tsis tas li ntawd, cov ntsiab lus siab ntawm acetylene hauv monomer ntawm cov khoom cuam tshuam rau qhov thermal stability ntawm PVC nyob rau hauv cov nyhuv synergistic ntawm acetaldehyde thiab hlau, uas cuam tshuam rau kev ua haujlwm ntawm cov khoom.
9. Cov seem seem
Cov seem ntawm lub sieve qhia txog qib ntawm qhov tsis sib xws ntawm cov khoom me me ntawm cov resin, thiab nws cov yam tseem ceeb uas cuam tshuam yog qhov ntau ntawm cov tshuaj dispersant hauv cov mis polymerization thiab cov nyhuv stirring. Yog tias cov khoom me me ntawm cov resin ntxhib dhau lossis zoo dhau, nws yuav cuam tshuam rau qib ntawm cov resin thiab tseem muaj kev cuam tshuam rau kev ua cov khoom tom qab.
10. “Qhov Muag Ntses”
"Qhov muag ntses", tseem hu ua crystal point, yog hais txog cov khoom siv resin pob tshab uas tsis tau plasticized nyob rau hauv cov txheej txheem thermoplastic ib txwm muaj. Kev cuam tshuam rau kev tsim khoom tiag tiag. Lub hauv paus tseem ceeb ntawm "qhov muag ntses" yog tias thaum cov ntsiab lus ntawm cov tshuaj kub siab hauv monomer siab, nws yaj cov polymer hauv cov khoom thaum lub sijhawm polymerization, txo qhov porosity, ua rau cov khoom tawv, thiab dhau los ua "qhov muag ntses" ib ntus thaum lub sijhawm ua plasticization. Tus pib tau faib tsis sib xws hauv cov roj monomer. Hauv lub kaw lus polymerization nrog kev hloov pauv cua sov tsis sib xws, kev tsim cov resin nrog qhov hnyav molecular tsis sib xws, lossis qhov tsis huv ntawm lub reactor thaum pub mis, cov residue residue, lossis lo rau ntawm cov khoom siv reactor ntau dhau tuaj yeem ua rau "qhov muag ntses". Kev tsim ntawm "qhov muag ntses" cuam tshuam ncaj qha rau qhov zoo ntawm cov khoom PVC, thiab hauv kev ua tom qab, nws yuav cuam tshuam rau qhov zoo nkauj ntawm cov khoom. Nws tseem yuav txo qis cov khoom siv kho tshuab xws li lub zog tensile thiab elongation ntawm cov khoom, uas tuaj yeem ua rau perforation ntawm cov yas zaj duab xis lossis daim ntawv, tshwj xeeb tshaj yog cov khoom cable, uas yuav cuam tshuam rau lawv cov khoom hluav taws xob rwb thaiv tsev. Nws yog ib qho ntawm cov cim qhia tseem ceeb hauv kev tsim cov resin thiab kev ua cov yas.