xov xwm

Dab tsi yog qhov zoo tshaj plaws ntawm cov roj silicone uas peb tsis paub?

Ntau yam khoom hauv lub neej tau muab coj los ua ke los ntawm cov khoom siv tshuaj lom neeg. Cov khoom no tau siv lawv qhov zoo rau peb siv. Cov roj silicone feem ntau yog hais txog cov khoom lag luam polysiloxane uas tswj hwm lub xeev cov kua hauv chav sov. Feem ntau nws tsis muaj xim (lossis lub teeb daj), tsis muaj ntxhiab, tsis muaj tshuaj lom, tsis muaj kuab lom, tsis yaj hauv dej, methanol, ethylene glycol, thiab sib xws nrog benzene. , Dimethyl ether, carbon tetrachloride los yog kerosene yog sib tov sib xyaw, me ntsis yaj hauv acetone, dioxane, ethanol thiab butanol. Cia kuv qhia qhov zoo tshaj plaws ntawm cov roj silicone.

Ib. tiv tshav kub zoo

Txij li cov saw tseem ceeb ntawm polysiloxane molecule tau tsim los ntawm -Si-O-Si-bonds, nws muaj cov qauv zoo ib yam li cov inorganic polymers, thiab nws cov nyiaj sib zog yog siab heev, yog li nws muaj cua sov zoo heev.

Ob. Zoo oxidation ruaj khov thiab huab cua tsis kam

Peb. zoo hluav taws xob rwb thaiv tsev

Cov roj silicone muaj cov khoom siv hluav taws xob zoo, thiab nws cov yam ntxwv hluav taws xob hloov me me nrog kev hloov pauv ntawm qhov kub thiab txias. Lub dielectric tsis tu ncua nrog qhov kub nce, tab sis qhov kev hloov pauv me me. Lub zog hluav taws xob ntawm cov roj silicone yog qis, thiab nws nce nrog qhov kub nce, tab sis tsis muaj txoj cai nrog qhov hloov pauv zaus. Qhov ntim tsis kam txo qis raws li qhov kub nce.

Plaub. zoo hydrophobicity

Txawm hais tias lub ntsiab saw ntawm 　　cov roj silicone yog tsim los ntawm txoj kab sib chaws ncov qaum Si-O, cov pab pawg tsis-ncov qaumteb qabteb alkyl nyob rau sab saw yog taw qhia sab nraud, tiv thaiv cov dej molecules los ntawm sab hauv thiab ua lub luag haujlwm hydrophobic. Qhov sib cuam tshuam ntawm cov roj silicone rau dej yog li 42 dyne/cm. Thaum kis rau ntawm iav, vim yog cov dej tsis zoo ntawm cov roj silicone, lub kaum sab xis ntawm kwv yees li 103oC tau tsim, uas yog piv rau paraffin ciab.

Tsib. viscosity-kub coefficient yog me me

Cov viscosity ntawm silicone roj tsawg, thiab nws hloov pauv me me nrog qhov ntsuas kub, uas cuam tshuam nrog cov qauv helical ntawm silicone roj molecules. Cov roj silicone muaj qhov zoo tshaj plaws viscosity-kub yam ntxwv ntawm ntau yam kua roj nplua nyeem. Cov yam ntxwv ntawm cov roj silicone yog qhov tseem ceeb heev rau cov khoom ua kom ntub.

Rau. siab compression kuj

Vim yog cov yam ntxwv zoo nkauj ntawm cov roj silicone roj molecules thiab qhov loj nyob deb ntawm cov qauv, nws muaj kev tiv thaiv siab. Siv cov yam ntxwv ntawm cov roj silicone, nws tuaj yeem siv ua kua dej caij nplooj ntoo hlav. Piv nrog rau lub caij nplooj ntoo hlav, lub ntim tuaj yeem txo qis.

Xya. tsis tshua muaj qhov nro

Qhov ntom ntom ntom ntom ntom ntom ntom yog cov yam ntxwv ntawm cov roj silicone. Tsawg qhov nro txhais tau tias ua haujlwm siab. Yog li ntawd, cov roj silicone muaj cov khoom ua kom defoaming zoo thiab tiv thaiv ua npuas dej, cov khoom sib cais los ntawm lwm yam tshuaj, thiab cov khoom ua kom lub zog.

Yim. tsis muaj tshuaj lom, tsis qab thiab lub cev tsis muaj zog

"Los ntawm qhov kev xav ntawm lub cev, silicone polymers yog ib qho ntawm cov tshuaj tsis muaj zog tshaj plaws paub. Simethicone yog inert rau cov kab mob thiab tsis muaj kev tsis pom zoo nrog tsiaj lub cev. Yog li ntawd, lawv tau siv dav hauv cov chaw haujlwm xws li phais thiab tshuaj sab hauv, tshuaj, khoom noj thiab tshuaj pleev ib ce.

Cuaj. zoo lubricity

Cov roj silicone muaj ntau yam khoom zoo xws li cov roj nplua nyeem, xws li lub teeb nyem siab, qhov chaw khov qis, cov cua sov ruaj khov, hloov pauv me me viscosity, tsis muaj xeb hlau, tsis muaj kev cuam tshuam rau roj hmab, plastics, txheej txheej, cov xim pleev xim organic, thiab qis. nto nro. Nws yog qhov yooj yim kis rau ntawm cov hlau nto thiab lwm yam yam ntxwv. Txhawm rau txhawm rau txhim kho cov hlau-rau-hlau lubricity ntawm cov roj silicon, cov roj nplua nyeem ntxiv uas tuaj yeem ua miscible nrog cov roj silicon tuaj yeem ntxiv. Qhia txog cov pab pawg chlorophenyl ntawm cov saw siloxane lossis hloov pauv ib pawg trifluoropropylmethyl rau ib pawg dimethyl tuaj yeem txhim kho cov roj nplua nyeem ntawm cov roj silicone.

Kaum. Cov khoom siv tshuaj

Cov roj silicone yog qhov tsis sib xws vim tias Si-C daim ntawv cog lus ruaj khov heev. Tab sis cov tshuaj oxidants muaj zog yog qhov yooj yim los cuam tshuam nrog, tshwj xeeb tshaj yog thaum kub. Cov roj silicone ua rau hnyav nrog cov tshuaj chlorine, tshwj xeeb tshaj yog rau cov roj methyl silicone. Qee zaum yuav muaj cov tshuaj tiv thaiv tawg. Cov ntawv Si-O tau yooj yim tawg los ntawm cov hauv paus muaj zog lossis cov kua qaub. Cov tshuaj sulfuric acid mloog zoo sai sai ntawm qhov kub thiab txias, ua rau cov saw siloxane txuas thiab txuas rau nws. Hauv qhov no, cov roj silicone uas muaj cov pab pawg alkane siab thiab cov pab pawg phenyl muaj kev ruaj khov dua, tab sis cov tshuaj sulfuric acid ntau yuav ua rau cov benzene-silicon daim ntawv cog lus ntawm pawg phenyl thiab tso tawm benzene.