Qhov sib txawv tseem ceeb ntawm cov roj hmab thiab silicone yog cov pob txha ntawm feem ntau ntawm cov ntaub ntawv roj hmab muaj cov pa roj carbon-carbon bonds thaum lub pob txha ntawm silicone muaj silicon thiab oxygen.
Ob leeg roj hmab thiab silicone yog elastomers. Lawv yog cov khoom siv polymeric uas nthuav tawm cov cwj pwm viscoelastic, uas peb feem ntau hu ua elasticity. Peb tuaj yeem paub qhov txawv ntawm silicone los ntawm cov roj hmab los ntawm cov qauv atomic. Tsis tas li ntawd, silicones muaj cov khoom tshwj xeeb tshaj li cov roj hmab ib txwm. Cov roj hmab yog ib txwm tshwm sim, lossis lwm yam peb tuaj yeem ua rau lawv, tab sis silicon tsuas yog hluavtaws hauv cov xwm txheej. Nyob ntawm cov no, peb tuaj yeem pom qhov sib txawv ntawm silicone thiab roj hmab.
Rubber yog dab tsi?
Feem ntau, peb xav txog tag nrho cov elastomers li cov roj hmab uas qhov ntev tau hloov pauv ntau los ntawm kev ntxhov siab, thiab lawv tuaj yeem mus rau qhov qub qhov ntev tom qab tshem tawm qhov kev ntxhov siab. Cov ntaub ntawv no qhia cov iav hloov pauv kub vim lawv cov qauv amorphous. Muaj ntau hom roj hmab lossis elastomers zoo li cov roj hmab ntuj, hluavtaws polyisoprene, styrene butadiene roj hmab, nitrile roj hmab, polychloroprene, thiab silicone.
Txawm li cas los xij, cov roj hmab ntuj yog cov roj hmab uas los rau peb lub siab thaum xav txog roj hmab. Peb tau txais cov roj hmab ntuj los ntawm latex ntawm tsob ntoo roj hmab (Heveabrasiliensis). Tsis tas li ntawd, cis-1, 4-polyisoprene yog cov qauv ntawm cov roj hmab ntuj. Txawm hais tias cov roj hmab silicone muaj silicon hauv cov saw hlau polymer es tsis txhob siv cov pa roj carbon monoxide, feem ntau ntawm cov roj hmab muaj cov saw hlau polymer ntawm carbon.
Daim duab 01: Daim Ntawv Roj Hmab Ntuj
Ntxiv rau qhov ntawd, roj hmab tseem ceeb rau ntau daim ntawv thov xws li cookware, electronics, automotive applications thiab lwm yam, vim lawv tus cwj pwm elastic. Raws li lawv yog cov ntaub ntawv tsis muaj dej, lawv muaj txiaj ntsig zoo li sealants, hnab looj tes thiab lwm yam. Roj hmab lossis elastomers yog cov ntaub ntawv zoo heev rau insulating lub hom phiaj.
Y Silicone yog dab tsi?
Silicon yog ib hom roj hmab hluavtaws. Peb tuaj yeem tsim nws los ntawm kev hloov kho silicon. Tsis tas li ntawd, cov khoom siv no muaj lub nraub qaum ntawm silicon atoms nrog alternating oxygen atoms. Raws li silicone muaj zog silicon-oxygen bonds, nws yog resistant rau kub dua li lwm yam roj hmab los yog elastomers.
Tsis zoo li lwm cov elastomers, cov pob txha inorganic ntawm silicone ua rau nws tiv taus cov kab mob thiab tshuaj lom neeg. Tsis tas li ntawd, silicone roj hmab tiv taus ozone thiab UV tawm tsam vim tias silicon-oxygen daim ntawv cog lus tsis tshua muaj kev cuam tshuam rau cov kev tawm tsam no dua li cov pa roj carbon-carbon daim ntawv cog lus ntawm cov pob txha hauv lwm cov elastomers. Ntxiv mus, cov khoom siv no muaj lub zog tensile qis thiab qis dua lub zog dua li cov organic rubbers. Txawm li cas los xij, ntawm qhov kub thiab txias, nws qhia tau zoo heev tensile thiab kua muag zog. Qhov no yog vim qhov txawv ntawm cov khoom hauv silicone tsawg dua ntawm qhov kub thiab txias.
Daim duab 02: Mats ua los ntawm Silicone
Silicone yog ruaj dua li lwm cov elastomers. Nov yog qee qhov txiaj ntsig zoo ntawm silicone. Txawm li cas los xij, lub neej qaug zog ntawm silicone roj hmab yog luv dua li cov organic rubbers. Nws yog ib qho tsis zoo ntawm daim ntawv roj hmab no. Tsis tas li ntawd, nws cov viscosity siab; yog li ntawd, nws ua rau muaj teeb meem kev tsim khoom vim cov khoom ntws tsis zoo.
Qhov txawv ntawm Roj Hmab thiab Silicone yog dab tsi?
Silicon yog ib hom roj hmab hluavtaws. Txawm li cas los xij, qhov sib txawv tseem ceeb ntawm cov roj hmab thiab silicone yog cov pob txha ntawm silicone muaj silicon thiab oxygen, thaum lub pob txha ntawm feem ntau ntawm cov ntaub ntawv roj hmab muaj cov pa roj carbon-carbon bonds.
Ntxiv mus, hais txog cov khoom, qhov sib txawv ntawm cov roj hmab thiab silicone yog tias cov roj hmab ib txwm tsis tshua muaj kev tiv thaiv tshav kub, tshuaj tua kab mob, fungus tawm tsam, UV thiab Ozone tawm tsam. Tab sis, silicone tiv taus cua sov, tshuaj tua kab mob, fungus tawm tsam, UV thiab Ozone tawm tsam dua li qub roj hmab.
Tsis tas li ntawd, raws li lwm qhov sib txawv ntawm cov roj hmab thiab silicone, cov roj hmab organic muaj qhov tsis zoo tensile thiab tsim kua muag ntawm qhov kub thiab txias thaum cov khoom no zoo heev hauv silicone roj hmab ntawm tib qhov kub thiab txias. Yog li ntawd, silicone roj hmab muaj cov khoom tshwj xeeb, uas cov roj hmab organic tsis muaj.
Summary – Rubber vs Silicone
Silicon yog ib hom roj hmab hluavtaws. Yog li ntawd, nws kuj yog ib hom elastomer li roj hmab. Qhov sib txawv tseem ceeb ntawm cov roj hmab thiab silicone yog cov pob txha ntawm feem ntau ntawm cov ntaub ntawv roj hmab muaj cov pa roj carbon-carbon bonds thaum lub pob txha ntawm silicone muaj silicon thiab oxygen.
