Dab tsi yog Cov Khoom Ntawm Silicone Roj Hmab?

Lub hauv paus txheej txheem ntawm cov khoom siv silicone yog tsim los ntawm silicon-oxygen chains, thiab sab chains txuas nrog ntau lwm cov organic pawg los ntawm silicon atoms. Yog li, cov qauv ntawm cov khoom siv silicone muaj ob qho tib si 'organic pawg' thiab 'inorganic qauv'. Qhov tshwj xeeb muaj pes tsawg leeg thiab cov qauv molecular no ua rau nws sib xyaw cov yam ntxwv ntawm cov teeb meem organic thiab kev ua haujlwm ntawm cov teeb meem inorganic. Piv nrog rau lwm cov ntaub ntawv polymer, cov khoom zoo tshaj plaws ntawm cov khoom siv silicone yog:

1. Kub tiv taus

Cov khoom siv silicone yog raws li cov khoom siv silicon-oxygen (Si-O) daim ntawv cog lus raws li cov qauv saw tseem ceeb, daim ntawv cog lus lub zog ntawm CC daim ntawv cog lus yog 82.6 kcal / mol, thiab daim ntawv cog lus zog ntawm Si-O daim ntawv cog lus yog 121 kcal hauv silicone / molecule, yog li Lub thermal stability ntawm silicone khoom yog siab, thiab cov tshuaj bonds ntawm molecules tsis tawg los yog decomposed nyob rau hauv siab kub (los yog hluav taws xob raug). Silicone tsis tsuas yog tiv taus qhov kub thiab txias, tab sis kuj tsis tshua muaj kub, feem ntau silicone kub yog -60 degree ~ 200 degree, tuaj yeem siv dav hauv qhov kub thiab txias.

2. Huab cua tsis kam

Cov saw tseem ceeb ntawm cov khoom siv silicone yog -Si-O-, thiab tsis muaj ob daim ntawv cog lus, yog li nws tsis yooj yim rau decomposed los ntawm ultraviolet lub teeb thiab ozone. Silicone muaj thermal stability zoo dua, hluav taws xob tiv thaiv thiab huab cua tsis zoo dua li lwm cov ntaub ntawv polymer. Kev pabcuam lub neej ntawm silicone hauv ib puag ncig ntuj tuaj yeem ncav cuag ntau xyoo lawm.

3. Cov khoom hluav taws xob rwb thaiv tsev

Txhua yam khoom siv silicone muaj cov khoom siv hluav taws xob zoo, thiab lawv cov dielectric poob, tiv taus hluav taws xob, arc tsis kam, corona kuj, ntim resistivity thiab nto resistivity yog qhov zoo tshaj plaws hauv cov ntaub ntawv insulating, thiab lawv cov khoom hluav taws xob cuam tshuam los ntawm kub thiab zaus. cuam ​​tshuam me me. Yog li ntawd, lawv yog cov khoom siv hluav taws xob ruaj khov thiab tau siv dav hauv kev lag luam hluav taws xob thiab hluav taws xob. Ntxiv rau qhov ua tau zoo ntawm cov cua sov, silicone kuj muaj cov dej zoo heev, uas yog qhov kev lees paub ntawm kev ntseeg siab ntawm cov khoom siv hluav taws xob hauv cov dej ntub dej.

4. physiological inertia

Polysiloxanes yog cov tsis muaj zog tshaj plaws uas paub. Lawv yog cov resistant rau lom lom neeg laus, tsis muaj rejection tshuaj tiv thaiv nrog tsiaj, thiab muaj zoo anticoagulant zog.

5. Tsawg nto nro thiab qis nto zog

Cov saw tseem ceeb ntawm silicone yog hloov tau yooj yim, thiab nws lub zog intermolecular muaj zog ntau dua li cov hydrocarbons. Yog li ntawd, nws muaj qis viscosity, tsis muaj zog saum npoo nro, qis zog saum npoo, thiab muaj peev xwm ua kom muaj zog ntau dua li hydrocarbons ntawm tib qhov hnyav molecular. Qhov no tsis tshua muaj qhov nro thiab tsis tshua muaj zog saum npoo yog lub hauv paus tseem ceeb rau nws cov kev siv ntau yam: hydrophobicity, defoaming, ua npuas ncauj stabilization, anti-sticking, lubrication, glazing thiab lwm yam khoom zoo heev.