D4 thiab D5 silicones yog ib hom silane uas feem ntau siv hauv kev tsim cov roj hmab silicone thiab lwm yam khoom siv silicone. Qhov sib txawv tshwj xeeb ntawm D4 thiab D5 silicones yog lawv qib ntawm polymerization, uas yog tus naj npawb ntawm silicon atoms hauv monomeric molecule. Lub degree ntawm polymerization ntawm D4 silicone yog plaub, thaum lub degree ntawm polymerization ntawm D5 silicone yog tsib. Qhov siab dua ntawm cov txheej txheem ntawm polymerization, qhov hardness ntawm silicone roj hmab ntau dua, thaum tuav cov cua sov ua haujlwm zoo, huab cua tsis kam, thiab cov khoom hluav taws xob. Hauv cov ntawv thov kev lag luam, D4 thiab D5 silicones yog siv rau hauv sealants, adhesives, rwb thaiv tsev, thiab lwm yam.
Ob leeg D4 thiab D5 silicones yog ib qho tseem ceeb silicone compounds, thiab lawv muaj ntau yam kev siv nyob rau hauv ntau lub teb.
D4 (octamethylcyclotetrasiloxane) yog cov tsis muaj xim, pob tshab los yog cov kua mis dawb uas yog nplaim taws thiab tsw ntxhiab. Nws yog ib tug compound tau los ntawm kev sib cais thiab rectification nyob rau hauv lub hauv paus ntawm cov khoom npaj los ntawm dimethyldichlorosilane los ntawm hydrolysis thiab synthesis txheej txheem. D4 yog ib qho tseem ceeb nruab nrab hauv kev lag luam organosilicon, feem ntau yog siv rau kev npaj cov ntaub ntawv xws li organosilicon polymers xws li methyl silicone roj. Tsis tas li ntawd, D4 kuj yog ib qho tseem ceeb raw cov ntaub ntawv rau textile silicone softeners.
D5 (decamethylcyclopentasiloxane) yog ib qho tsis muaj zog cyclic polydimethylsiloxane nrog cov xim tsis muaj xim, tsis qab, tsis muaj ntxhiab, tsis muaj roj thiab tsis ua rau khaus. D5 kuj tseem yog ib qho tseem ceeb ntawm cov khoom siv silicone, uas yog siv los ua cov khoom siv raw rau kev sib txuas ntawm silicone roj, silicone roj emulsion, silicone roj hmab, silicone resin, silicone surfactant, thiab silicone khoom. Nyob rau hauv lub tshav pob ntawm cov khoom tu, D5 yog lub hauv paus roj ntawm ntau yam khoom tu, nrog zoo kis tau tus mob, lubricity thiab nws volatility. Tsis tas li ntawd, D5 tuaj yeem siv rau hauv cov tshuaj tua kab mob, tshuaj deodorants, tshuaj pleev plaub hau, tshuaj ntxuav tes, tshuaj pleev ib ce, tshuaj pleev ib ce, tshuaj pleev thaiv hnub, tshuaj pleev thaiv hnub, khoom siv shaving, nrog rau cov ntsia thawv polish thiab tshuaj pleev ib ce, thiab lwm yam.
Zuag qhia tag nrho, muaj qee qhov sib txawv ntawm D4 thiab D5 silicones hais txog cov khoom siv tshuaj lom neeg thiab kev siv. D4 feem ntau yog siv los npaj cov ntaub ntawv xws li organosilicon polymers xws li methyl silicone roj, thaum D5 yog siv los ua ke ntau yam khoom siv silicon thiab muaj ntau yam kev siv hauv kev kho cov khoom. Kev nkag siab txog lawv cov khoom thiab cov ntawv thov tuaj yeem pab koj xaiv cov khoom zoo lossis cov khoom lag luam kom tau raws li koj cov kev xav tau tshwj xeeb.
Tsis tas li ntawd, D4 thiab D5 silicones tuaj yeem cuam tshuam kev noj qab haus huv, yog li yuav tsum tau ceev faj kom raug thaum tuav.
