FVMQ (Fluorosilicone Roj Hmab) - Khoom Txheej Txheem
FVMQ yog lub siab -kev ua tau zoo elastomer tsim los ntawm kev qhia fluorine- muaj cov pab pawg rau hauv cov pob txha silicone polymer. Nws ua ke qhov zoo tshaj plaws siab - thiab qis- kub tsis kam ntawm silicone roj hmab nrog cov roj thiab roj tsis kam ntawm fluorocarbon roj hmab (FKM), ua rau nws yog ib qho zoo tagnrho sealing khoom rau ntau daim ntawv thov.
Basic txhais & Chemical Structure
Tshuaj npeTom ntej: Fluorovinyl Methyl Siloxane
ASTM Daim Ntawv Pov Thawj: FVMQ(tseem hu ua FMQ lossis FLS hauv qee cov qauv)
Molecular Structure: Cov pob txha polymer muaj cov siloxane (Si-O) cov ntawv cog lus, nrog qee pawg methyl sab hloov los ntawm pawg trifluoropropyl. Cov qauv tshwj xeeb no muab FVMQ nws qhov sib npaug ntawm cov khoom sib txawv.
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm
FVMQ ua tau zoo tshwj xeeb hauv nws qhov kev khiav hauj lwm uas tau teev tseg, tab sis nws kuj muaj qhov txwv tsis pub muaj.
Qhov zoo
| Khoom | Kev piav qhia |
|---|---|
| Qhov kub thiab txias heev | Qhov no yog FVMQ lub zog tseem ceeb. Tus txheej txheem kev pabcuam kub yog feem ntau-60℃rau +177 degree(–76℃F rau +350℃F), nrog rau qee qhov kev tsim tshwj xeeb muaj peev xwm ua kom muaj kev txwv ntau dua. Nws tswj kev hloov pauv ntawm qhov kub tsis tshua muaj qhov zoo dua li tus qauv FKM. |
| Zoo heev Roj & Roj Resistance | Muab kev tiv thaiv zoo rau roj av-cov roj raws li cov roj, hydrocarbon fuels, cov roj ntxhia muaj ntxhiab, thiab ntau cov kuab tshuaj. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau aerospace roj tshuab thiab kev siv tsheb fais fab. |
| Superior Huab cua & Ozone Resistance | Inherits silicone inherent tsis kam rau ozone, oxygen, thiab ultraviolet (UV) lub teeb, kom ntseeg tau ntev -lub sij hawm durability nyob rau hauv sab nraum zoov los yog siab -altitude ib puag ncig. |
Kev txwv
| Khoom | Kev piav qhia |
|---|---|
| Tsawg Mechanical Strength | Lub zog tensile, tsim kua muag, thiab kev puas tsuaj kuj yog qhov tsis zoo piv rau lwm cov elastomers. Yog li ntawd, FVMQ yogzoo tshaj plaws rau static sealinges tsis yog dynamic, siab - hnav, lossis siab - kev siv kev ntxhov siab. |
| Tshuaj Incompatibility | Nws tsis tiv taus cov tshuaj polar xws liketones, aldehydes, amines, thiabbrake kua. Kev sib cuag nrog cov neeg ua haujlwm no tuaj yeem ua rau o, degradation, lossis ua haujlwm tsis ua haujlwm. |
Lub cev muaj zog (Cov ntaub ntawv Summary)
Hauv qab no yog qhov muab tso ua ke ntawm cov khoom ntiag tug ntau yam rau FVMQ los ntawm ntau qhov chaw lag luam:
| Parameter | Hom Tus Nqi / Ntau | Lus hais |
|---|---|---|
| Hardness (Shore A) | 40 – 85 | Standard compounds yog 40-80; qee cov qib tshwj xeeb ncav cuag 85 |
| Tensile zog | Mus txog ~ 1,200 - 1,500 psi | Formulation-dependent; zuag qhia tag nrho qis dua FKM lossis EPDM |
| Elongation ntawm Break | 100% – 480% | |
| Standard Temp. Ntau yam | -60℃rau +177 degree | Ua tau raws li feem ntau aerospace thiab automotive sealing yuav tsum |
| Xim Xim | Xiav (standard) | Kev cai xim muaj raws li qhov kev thov |
Kev tsim khoom & kev ua haujlwm
FVMQ tuaj yeem ua tiav siv cov cuab yeej siv thiab cov txheej txheem zoo ib yam li cov siv rau cov pa roj hmab silicone, muab cov khoom lag luam zoo:
Cov txheej txheem molding: Haum raucompression molding, txhaj tshuaj molding, hloov molding, zoo licalendering thiab extrusiontxheej txheem. Qhov no ua rau tus nqi- ua tau zoo ntawm cov khoom siv hauv cov khoom ntim siab.
Curing (Crosslinking) Systems:
Peroxide Curing- Txoj kev siv ntau tshaj plaws, siv cov organic peroxides los pib sib txuas.
Condensation Curing- Siv rau chav -kub-vulcanizing (RTV) daim ntawv thov sealant.
Hydrosilylation (Kev Kho Ntxiv)- Ua haujlwm platinum catalysts kom ceev ceev, raug kho, feem ntau siv hauv cov kua tshuaj molding (LIM).
Kev txhawb zog: Fumed silicafeem ntau yog siv los ua thawj lub zog muab tub lim kom ua tiav qhov xav tau hardness thiab cov khoom siv kho tshuab.
Kev lag luam tseem ceeb Standards & Specifications
FVMQ tau hais dav dav hauv siab - kev ntseeg siab xws li aerospace thiab kev tiv thaiv. Cov qauv tseem ceeb suav nrog:
| Txuj | Lub npe / Sau ntawv |
|---|---|
| ASTM D2000 / SAE J200 | Line callout classification:FK |
| MIL-R-25988 | (Tam sim no hloov los ntawm AMS-R-25988) - Tub rog specification rau fluorosilicone elastomer |
| TIAB SA 3325 | Aerospace Material Specification rau FVMQ compounds |
| TIAB SA 3328 | Lwm qhov kev qhia tshwj xeeb ntawm aerospace qib |
Summary & Application Guidelines
FVMQ ua tus choj ntawm tus qauv silicone roj hmab thiab fluorocarbon roj hmab (FKM).Nws qhov tshwj xeeb tus nqi lus pom zoo nyob hauv kev sib xyaw ua keroj / roj kujthiabib qho tshwj xeeb dav kev pab cuam kub ntau yam- qhov sib npaug uas ob peb lwm cov elastomers tuaj yeem ua tiav.
Xaiv FVMQ thaum:
Daim ntawv thov cuam tshuam nrogroj, lubricating roj, los yog hydrocarbon solvents.
Ib puag ncig kev pabcuam suav nrogob qho tib si qis qis thiab siab kub.
Daim ntawv thov sealing yogfeem ntau static(eg, O-rings, gaskets, diaphragms).
Zam FVMQ thaum:
Daim ntawv thov suav nrogkev sib txhuam siab, siab dynamic kev nyuaj siab, los yog nruam puas.
Lub ntsiab sealing yog raug raunres kua, ketones, esters, los yog lwm yam polar tshuaj.
Siab tensile los yog kua muag lub zog yog thawj tsim yuav tsum tau.