Qhov Tseem Ceeb - EPDM vs PVC
EPDM (Ethylene Propylene Diene Monomer) thiab PVC (Poly-Vinyl Chloride) yog siv dav siv cov polymers vim lawv cov khoom tshwj xeeb. Qhov sib txawv tseem ceeb ntawm EPDM thiab PVC yog tias EPDM yog cov roj hmab hluavtaws, uas yog tsim los ntawm cov khoom siv roj av whereas, PVC yog cov thermoplastic, uas tuaj yeem yaj hauv qhov kub thiab txias thiab yog li, tau txais cov khoom pwm thiab tuaj yeem txias dua kom tau txais txiaj ntsig. rov qab rau daim ntawv. Qhov sib txawv ntawm EPDM thiab PVC tau tham hauv qab no kom ntxaws ntxiv.
EPDM yog dab tsi?
EPDM (Ethylene Propylene Diene Monomer) yog cov roj hmab siv dav siv los ntawm ethylene thiab propylene. Nws yog terpolymer uas tsim los ntawm grafting ntawm ib tug tsis-conjugated diene rau ntawm lub ntsiab saw. Vulcanization ntawm EPDM siv sulfur yog ua tau vim muaj cov kab sib txuas hauv interchains. EPDM yog tsim nyob rau hauv ntau yam viscosities thiab sib txawv ethylene / propylene ratios. Thaum cov ntsiab lus ethylene siab, cov roj hmab yuav muab lub zog ntsuab ntau dua thiab cov khoom tsis zoo rau qhov kub thiab txias. Hom thiab tus nqi ntawm diene monomer units grafted ntawm cov roj hmab txiav txim siab qhov yooj yim ntawm vulcanization. EPDM yog paub zoo tias huab cua thiab ozone resistant roj hmab. Raws li raw cov pos hniav elastomer manufacturers, lub sab sauv nruam kub aging kub yog qhov chaw nyob ib ncig ntawm 126 ° C mus rau 150 ° C.
Daim duab 01: EPDM (ethylene propylene diene monomer) roj hmab tiaj tus ru tsev
Qhov ntsuas kub qis ntawm EPDM yog qhov zoo tshaj thaum piv nrog cov roj hmab ntuj thiab SBR (styrene butadiene roj hmab), tab sis nrog cov roj tsis zoo. Vim hais tias ntawm cov khoom uas tau hais los saum no, EPDM tau dav siv los ua lub ru tsev membrane linings thiab extruded raws rau qhov rais. Tsis tas li ntawd, nws yog siv nyob rau hauv ib tug sib tov nrog ntuj roj hmab nyob rau hauv lub log tsheb sidewalls kom txo tau cov cracking los ntawm ozone nres. Ntxiv mus, zoo heev hluav taws xob rwb thaiv tsev khoom ntawm EPDM enables nws siv nyob rau hauv nruab nrab thiab high voltage cable npog. Kev sib xyaw ua ke ntawm cov khoom suav nrog kev ua haujlwm zoo rau kev nqus dej thiab cov khoom siv zoo thiab cov nqi qis ua rau nws siv los ua cov pas dej hauv pas dej. EPDM kuj tseem siv rau hauv kev lag luam tsheb ua hluav taws xob thiab lub rhaub dej thiab cov huab cua strips.
YPVC yog dab tsi?
PVC (Poly-Vinyl Chloride) yog tsim los ntawm polymerization ntawm vinyl chloride. Lub monomer vinyl chloride yog tsim los ntawm chlorine tau los ntawm cov dej ntsev electrolysis, thiab ethylene tau los ntawm naphtha. Ntau yam additives yuav tsum tau ntxiv rau PVC thaum lub sij hawm ua kom tau raws li qhov xav tau cov khoom, raws li PVC muaj tsawg thermal stability thiab siab yaj viscosity. Cov qauv tsim nyog ntawm PVC tuaj yeem npog ntau yam kev siv ua cov thermoplastic. Nws yog qhov thib ob loj tshaj plaws cov khoom siv thermoplastics tom qab polyethene (PE) hauv ntiaj teb vim nws cov khoom zoo heev, tus nqi qis thiab nruab nrab mus rau lub neej ntev kev siv. Cov iav hloov pauv kub (Tg) ntawm PVC nyob ib ncig ntawm 80 ° C. PVC feem ntau yog amorphous (90%), yog li nws tsis muaj qhov tseeb melting point. PVC tuaj yeem ua tau yooj yim los ntawm kev ntxiv cov yas yas. Li no, cov khoom siv hu ua PVC-C. Kev sib xyaw qhuav ntawm PVC yam tsis muaj cov yas yas yog hu ua PVC-U thiab siv rau cov ntaub ntawv nruj xws li cov kav dej, cov kav dej thiab lwm yam.
Daim duab 02: Cov kav dej PVC thiab Fittings
PVC yog qhov ruaj khov thiab tuaj yeem tsim los ua kom huab cua tiv taus. Nws kuj tseem siv tau rau kev sib cuag zaub mov, thiab daim ntawv thov kev kho mob yog vim nws inertness thiab clarity. PVC tawv yog tsis-flammable thiab muaj kev cuam tshuam lub zog. Tsis tas li ntawd, nws tiv taus ntau yam tshuaj, roj, thiab roj. Thaum piv rau lwm cov thermoplastics, qhov tshwj xeeb lub ntiajteb txawj nqus ntawm PVC yog siab dua, thiab qhov kev pab cuam tas li yog qhov qis. Vim yog kev noj qab haus huv tus cwj pwm ntawm monomer (vinyl chloride), dioxins thiab phthalate plasticizers, thiab txhuas (cadmium), qee cov neeg siv khoom yuav txwv tsis pub siv PVC. Daim ntawv thov ntawm PVC muaj xws li lub qhov rooj, qhov rais thav duab, kav dej, gutters, ru tsev membranes, telecommunication cables, phab ntsa plugs, dialysis tubing, phais hnab looj tes, khoom noj khoom haus pob khoom thiab lwm yam.
Qhov txawv ntawm EPDM thiab PVC yog dab tsi?
EPDM vs PVC |
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| EPDM yog cov roj hmab hluavtaws muab los ntawm ethylene thiab propylene. | PVC yog cov thermoplastic elastomer tsim los ntawm polymerization ntawm vinyl chloride. |
| Khoom tseem ceeb | |
| Huab cua zoo heev thiab ozone tsis kam, qhov kub thiab txias hloov tau yooj yim, tawg tsis kam, ua haujlwm zoo rau dej nqus thiab cov khoom siv zoo. | Nruab nrab mus rau lub neej ntev, huab cua tsis kam, biocompatibility, siab cuam tshuam, tiv taus ntau yam tshuaj, roj thiab roj, thiab pom tseeb zoo |
| txwv | |
| tsis zoo roj tsis kam thiab tawv, thiab cov khoom tsis zoo kub tsis zoo | Tsawg thermal stability, tsis tshua muaj kev pabcuam kub thiab kev noj qab haus huv cuam tshuam nrog monomer thiab additives. |
| Hom iav Hloov Kub Kub | |
| -55°C | 80°C |
| Daim ntawv thov | |
| ru tsev membrane linings, extruded raws rau qhov rais, log tsheb sidewalls, high voltage cable npog, pas dej liner, radiator thiab rhaub hoses, huab cua strips thiab lwm yam. | Qhov rooj, qhov rais thav duab, cov kav dej, cov kav dej, cov vov tsev, cov xov tooj sib txuas, cov phab ntsa ntsaws, cov raj lim dej, cov hnab looj tes phais, cov pob khoom noj thiab lwm yam. |
Summary – EPDM vs PVC
EPDM thiab PVC yog dav siv cov khoom siv polymers vim lawv cov nqi tsim khoom thiab cov khoom zoo heev. EPDM yog cov roj hmab hluavtaws ua los ntawm ethylene thiab propylene thiab muaj ozone zoo heev thiab huab cua tiv taus. PVC yog siv dav siv thermoplastic elastomer nrog tshuaj lom neeg thiab roj tsis kam, thiab muaj kev cuam tshuam zoo. Ob leeg cov polymers no yog siv rau hauv kev siv huab cua tiv taus. Txawm li cas los xij, lawv cov khoom tuaj yeem hloov kho raws li cov ntawv thov zaum kawg / khoom. Qhov no yog qhov txawv ntawm EPDM thiab PVC.
Download PDF EPDM vs PVC
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm EPDM thiab PVC
