Yam Khoom Tseem Ceeb
- Chemical Composition: Ua los ntawm polycondensation ntawm phenolic tebchaw thiab aldehydes; Cov mis mos molecular (C₆H₆O·CH₂O)ₓ; abbreviated li PF; feem ntau hu ua Bakelite lossis Bakelite hmoov.
- Cov tsos mob: Ameslikas muaj xim tsis muaj xim lossis daj -xim pob tshab xim av; tuaj yeem tshwm nyob rau hauv ntau yam xim (liab, daj, dub, ntsuab, thiab lwm yam) nrog ntxiv ntawm colorants; feem ntau pom nyob rau hauv granular los yog hmoov cov ntaub ntawv.
- Solubility: Insoluble hauv dej tab sis soluble hauv cov kuab tshuaj organic xws li acetone thiab cawv; phenolic resins nrog lub network cross- txuas cov qauv tsuas yog o es tsis yaj.
Structure Classification
- Linear Structure: Molecular chains txuas linearly yam tsis muaj cross-txuas; softens ntawm kwv yees li 150 degree; nthuav tawm 20% kev cuam tshuam ntau dua li cov qauv network thiab muaj cov yas muaj zog.
- Network Structure: Tsim ib qho peb - qhov sib txawv ntawm tus ntoo khaub lig- txuas txuas ntawm cov choj formaldehyde; muaj peev xwm muaj txog li 10²⁰ ntoo khaub lig- txuas cov ntsiab lus ib gram ntawm resin; compressive zog yog peb npaug ntawm cov qauv linear; withstands nruam cua sov ntawm 300 degree.
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm
- Thaum tshav kub kub Resistance: Muaj ntau ntau benzene nplhaib qauv; tswj kev ruaj ntseg hauv qab 200 degree; ua kom pom kev ruaj ntseg zoo ntawm qhov kub thiab txias; residual carbon tus nqi tuaj yeem tshaj 50%.
- Corrosion Resistance: Resistant rau qaug zog acids thiab qaug zog alkalis; decomposes nyob rau hauv muaj zog acids thiab corrodes nyob rau hauv muaj zog alkalis; qhia tau hais tias zoo tiv thaiv rau feem ntau cov kuab tshuaj organic thiab tshuaj lom neeg tshaj tawm.
- Mechanical Properties: Hla- txuas cov qauv imparts siab txhua yam muaj zog thiab zoo heev hnav thiab cuam tshuam tsis kam; tsawg shrinkage raws li curing kom ruaj ntseg ntawm cov khoom tiav.
- Insulation Properties: Muaj peev xwm rwb thaiv tsev zoo heev; ua hauj lwm raws li ib tug tseem ceeb raw khoom rau tsoos hluav taws xob rwb thaiv tsev Cheebtsam.
- Nplaim Retardancy: Cov pa luam yeeb tsawg thiab tsis yog - lom; hluav taws zoo heev- tiv taus kev ua haujlwm; nws cov khoom ua npuas ncauj tau qhuas tias yog "tus huab tais ntawm cov ntaub ntawv thermal rwb thaiv tsev."