Kev cuam tshuam ntawm silicon roj hmab nws tus kheej-nplaum daim kab xev sib xyaw carbon dub ntau yam thiab ambient kub ntawm ntim resistivity
Thaiv ob qhov kawg ntawm cov molecule (CH3) 3aOV2 (CH=CH) (CH3) SiO saw txuas nrog ib feem ntawm mole ntawm 0.15%, ib qib ntawm polymerization ntawm txog 6,000 methyl vinyl silicone roj hmab raw roj hmab 100 qhov chaw, hydrochloric acid absorption tus nqi yog 0.2 mL/g. Tus nqi iodine adsorption yog 48 mg / g, thaj chaw tshwj xeeb yog 32 m2 / g, thiab 30 qhov chaw ntawm cov pa roj carbon dub tau muab sib xyaw rau hauv lub kneader los tsim cov roj hmab sib xyaw. Cov khoom siv roj hmab sib xyaw nrog 1 feem ntawm 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane ntawm ob-yob roj hmab tov khoom los tsim cov khoom sib xyaw silicone roj hmab. Rau kev sib piv, hloov cov pa roj carbon dub nrog tib tus nqi ntawm hydrochloric acid. Lub peev xwm nqus tau yog 3.2 mL / g, tus nqi iodine adsorption yog 58 mg / g, thiab thaj chaw tshwj xeeb yog 58 m2 / g carbon dub b. Tib txoj kev yog siv rau kev sib xyaw Silicone Rubber. Ob hom sib xyaw silicone roj hmab tau vulcanized los ntawm kub nias ntawm 170 ° C rau 10 min los npaj cov ntawv xeem nrog lub thickness ntawm 1 hli, thiab tom qab ntawd vulcanized hauv 200 t qhov cub rau 4 h. Tom qab ntawd, ntsuas lub ntim resistivity ntawm ob conductive silicone roj hmab ntawm ntau yam kub,
Kev cuam tshuam ntawm Carbon Black ntau yam thiab ib puag ncig kub ntawm Volume Resistivity
Txhawm rau kom tau txais cov khoom siv sib xyaw silicone roj hmab nrog kev ua haujlwm zoo thiab kev ua haujlwm, thawj qhov loj me ntawm 60 ~ 120 khiav thiab DBP roj nqus ntawm 0.70 ~ 1. 2 mL / g ntawm cov khoom siv hluav taws xob muaj zog yuav tsum tau xaiv. Cov pa roj carbon dub no tuaj yeem sib txawv hauv cov roj hmab silicone, thiab thaum muab cov khoom siv zoo, nws kuj ua raws li tus neeg sawv cev txhawb nqa. Feem ntau siv acetylene conductive carbon dub muaj graphite crystals hauv nws cov qauv vim yog txoj kev tsim khoom, thiab muaj kev sib raug zoo nrog cov roj hmab roj hmab nyoos, uas tsis tsuas yog muaj qhov tsis zoo, tab sis kuj ua rau lub cev tsis zoo. Ntawm qhov tsis sib xws, lub cub tawg carbon dub npaj los ntawm kev kub hnyiab creosote hauv qhov cub kub tsis muaj graphite crystals, uas tuaj yeem txhim kho lub cev thiab hnav tsis kam ntawm silicone roj hmab. Cov pa roj carbon dub siv hauv cov roj hmab feem ntau yog xaiv los ntawm qhov kev xav ntawm kev txhawb zog, uas yog, los ntawm kev xav ntawm kev hnav tsis kam, thawj qhov loj me yog 40 rnn lossis tsawg dua, nyiam dua 20 rnn lossis tsawg dua, thiab los ntawm kev txiav txim siab ntawm imparting conductivity, nws tseem cia siab tias qhov loj me me yog qis dua 40 rnn. Nyob rau hauv qhov chaw saum toj no. Piv nrog rau cov saw hlau molecular ntawm lwm cov roj hmab organic, cov saw hlau molecular ntawm raw silicone roj hmab muaj qhov yooj yim heev. Xaiv cov pa roj carbon dub nrog lub nruab nrab qhov loj me me, uas yog, cov pa roj carbon dub nrog qhov loj me me ntawm 60-120 mn, tuaj yeem txhim kho kev txhawb nqa. DBP roj nqus ntawm 0.70 mus rau 1.2 mL / g yog qhov taw qhia ntawm cov pa roj carbon dub li niaj zaus, thiab thaum qhov loj me me yog 60 txog 120 nm tib lub sijhawm, nws txhais tau tias nws qhov chaw tshwj xeeb yog me me. Qhov tshwj xeeb ntawm thaj chaw muaj feem cuam tshuam nrog lub zog adsorption. Cov pa roj carbon dub nrog thaj chaw me me tshwj xeeb muaj qhov me me saum npoo adsorption quab yuam. Nws yog ib qho yooj yim rau disperse thaum siv nyob rau hauv cassia roj hmab raw roj hmab thiab muaj peev xwm ua tau zoo conductivity. Hom kev txhawb nqa cov pa roj carbon dub no tuaj yeem ua ke nrog lwm hom conductive carbon dub thiab lwm yam khoom siv ntxiv xws li nplaim hluav taws kub thiab cov khoom siv hluav taws xob hauv qhov tsim nyog.
