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Qhov tseem ceeb ntawm kev tshawb fawb thiab tsim cov roj hmab silicone hauv Suav teb - dimethyldiethoxysilane

General silicone roj hmab muaj cov khoom siv hluav taws xob zoo tshaj plaws thiab tuaj yeem ua haujlwm hauv qhov kub thiab txias ntawm - 55 ℃ txog 200 ℃ yam tsis tau poob nws qhov kev ua tau zoo ntawm hluav taws xob.Tsis tas li ntawd, muaj roj fluorosilicone roj hmab thiab phenyl silicone roj hmab uas tuaj yeem ua haujlwm ntawm - 110 ℃.Cov no yog cov ntaub ntawv tseem ceeb uas xav tau los ntawm aerospace sector thiab ntau yam kev lag luam hauv lub tebchaws.Los ntawm cov txheej txheem ntawm vulcanization, nws tuaj yeem muab faib ua plaub ntu: kub vulcanized silicone roj hmab nrog peroxide vulcanization, ob chav chav kub vulcanized silicone roj hmab nrog condensation, ib feem ntawm chav tsev kub vulcanized silicone roj hmab nrog noo noo vulcanization thiab platinum catalyzed ntxiv vulcanized silicone roj hmab. , thiab kuj tshiab ultraviolet los yog ray vulcanized silicone roj hmab.Yog li thaum ntxov thaum xaus ntawm xyoo 1950, ntau chav nyob hauv Suav teb tau pib tshawb fawb thiab tsim ntau yam silicone roj hmab thiab nws cov ntawv thov.

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Basic kub vulcanized silicone roj hmab

Tuam Tshoj pib tshawb fawb thiab tsim cov roj hmab nyoos ntawm cov cua sov vulcanized (tseem hu ua cua sov kho) silicone roj hmab hauv xyoo 1950s.Nws tsis yog lig dhau lawm nyob rau hauv lub ntiaj teb no uas Tuam Tshoj pib tshawb nrhiav silicone roj hmab.Vim txoj kev txhim kho kev ua haujlwm xav tau ntau cov high-purity hydrolysates ntawm dimethyldichlorosilane (los ntawm qhov twg octamethylcyclotetrasiloxane (D4, los yog DMC) tau txais; yav tas los, vim tsis muaj ntau ntawm methylchlorosilane, nws yog ib qho nyuaj kom tau txais ntau tus lej. ntawm cov ntshiab dimethyldichlorosilane, thiab tsis muaj txaus los sim tsim cov khoom siv raw ntawm raw silicone roj hmab octamethylcyclotetrasiloxane, tseem yuav tsum muaj cov catalysts tsim nyog hauv lub nplhaib qhib polymerization, uas yog cov teeb meem loj nyob rau theem pib ntawm kev loj hlob. kev tsim khoom ntawm methylchlorosilane yog qhov nyuaj heev, yog li cov kws tshaj lij ntawm cov chav nyob hauv Suav teb tau them nyiaj ntau thiab siv sijhawm ntau.

Yang Dahai, Shenyang Chemical Research Institute, thiab lwm yam tau nthuav tawm cov qauv ntawm silicone roj hmab npaj los ntawm tus kheej-ua dimethyldichlorosilane rau 10th hnub tseem ceeb ntawm lub tebchaws.Lin Yi thiab Jiang Yingyan, cov kws tshawb fawb ntawm lub koom haum ntawm chemistry, Suav Academy ntawm Kev Tshawb Fawb, kuj tau tsim cov methyl silicone roj hmab thaum ntxov.Hauv xyoo 1960, ntau chav tsim cov roj hmab silicone.

Tsuas yog tom qab ua tiav ntawm kev sib txuas ncaj qha ntawm methylchlorosilane hauv lub txaj txaj, tuaj yeem tau txais cov khoom siv raw rau cov khoom siv roj hmab silicone.Vim tias qhov kev thov ntawm silicone roj hmab yog ceev heev, yog li muaj cov chav nyob hauv Shanghai thiab North Tuam Tshoj pib tsim cov roj hmab silicone.Piv txwv li, Shanghai Chemical Research Institute hauv Shanghai kawm txog kev sib txuas ntawm methyl chlorosilane monomer thiab kev tshawb nrhiav thiab kev sim ntawm silicone roj hmab;Shanghai Xincheng tshuaj cog thiab Shanghai resin cog xav txog cov synthesis ntawm silicone roj hmab los ntawm kev xav ntawm ntau lawm.

Nyob rau sab qaum teb, lub koom haum tshawb fawb ntawm Jihua lub tuam txhab, lub hauv paus kev lag luam chemical hauv Suav teb, feem ntau yog koom nrog kev tshawb fawb thiab kev tsim cov roj hmab hluavtaws.Tom qab ntawd, lub koom haum tshawb fawb tau nce kev tshawb fawb thiab kev loj hlob ntawm silicone roj hmab coj los ntawm Zhu BAOYING.Tseem muaj cov chaw tsim khoom thiab cov chaw tsim khoom hauv Jihua lub tuam txhab, uas muaj kev koom tes zoo ib leeg los tsim cov txheej txheem ua tiav los ntawm methyl chlorosilane monomer rau hluavtaws silicone roj hmab.

Xyoo 1958, lub koom haum organosilicon ntawm Shenyang Chemical Research Institute tau tsiv mus rau lub koom haum tshawb fawb tshuaj tshawb fawb Beijing tshiab.Thaum xyoo 1960, Shenyang Chemical Research Institute tau tsim ib lub chaw tshawb fawb organosilicon coj los ntawm Zhang Erci thiab ye Qingxuan los tsim organosilicon monomer thiab silicone roj hmab.Raws li kev xav ntawm Lub Chaw Haujlwm Thib Ob ntawm Ministry of chemical kev lag luam, Shenyang Chemical Research Institute tau koom nrog kev tsim cov roj hmab silicone hauv lub koom haum tshawb fawb ntawm Jilin chemical tuam txhab.Vim hais tias cov synthesis ntawm silicone roj hmab kuj xav tau vinyl nplhaib, yog li Shenyang Chemical Research Institute rau cov synthesis ntawm methylhydrodichlorosilane thiab lwm yam txhawb organosilicon monomers.

Thawj cov khoom tsim ntawm silicone roj hmab hauv Shanghai yog "circuitous tactics"

Xyoo 1960, lub tuam txhab yas ntawm Shanghai Chemical Industry Bureau tau muab Xincheng tshuaj tsob nroj ua haujlwm los tsim cov roj hmab silicon uas xav tau los ntawm kev lag luam tub rog.Vim hais tias cov nroj tsuag muaj chloromethane, tshuaj tua kab los ntawm cov khoom siv organosilicon raw khoom, nws muaj cov xwm txheej los ua ke methyl chlorosilane, raw khoom ntawm silicon roj hmab.Xincheng tshuaj tsob nroj yog ib qho me me rau pej xeem-tswj koom ua lag luam cog, nrog tsuas yog ob tus kws tshaj lij engineering, Zheng Shanzhong thiab Xu Mingshan.Lawv tau txheeb xyuas ob qhov teeb meem tseem ceeb hauv txoj haujlwm tshawb fawb silicone roj hmab, ib qho yog kev ua kom huv ntawm dimethyldichlorosilane, lwm qhov yog kev kawm txog cov txheej txheem polymerization thiab xaiv cov catalyst.Lub sijhawm ntawd, organosilicon monomers thiab intermediates raug txwv thiab thaiv hauv Suav teb.Lub sijhawm ntawd, cov ntsiab lus ntawm dimethyldichlorosilane nyob rau hauv cov synthesis ntawm methylchlorosilane monomer nyob rau hauv domestic stirred txaj yog tsawg, thiab npaum distillation tshuab tseem tsis tau siv, yog li nws yog tsis yooj yim sua kom tau txais ib tug loj tus naj npawb ntawm high-purity dimethyldichlorosilane monomer raws li raw khoom. cov khoom siv ntawm silicone roj hmab.Yog li ntawd, lawv tsuas tuaj yeem siv cov dimethyldichlorosilane nrog cov purity tsawg uas tuaj yeem tau txais thaum lub sijhawm ntawd los npaj ethoxyl derivatives los ntawm alcoholysis.Qhov kev ncua deb ntawm lub boiling point ntawm methyltriethoxysilane (151 ° C) thiab lub boiling point ntawm dimethyldiethoxysilane (111 ° C) tom qab haus dej cawv yog loj, thiab lub boiling point sib txawv yog ntau npaum li 40 ° C, uas yog ib qho yooj yim mus cais, yog li ntawd. lub dimethyldiethoxysilane nrog siab purity tuaj yeem tau txais.Tom qab ntawd, dimethyldiethoxysilane tau hydrolyzed rau octamethylcyclotetrasiloxane (methyld4).Tom qab fractionation, siab purity D4 tau tsim, uas daws qhov teeb meem ntawm raw khoom ntawm silicone roj hmab.Lawv hu txoj kev tau txais D4 los ntawm kev tsis ncaj ncees ntawm cawv "circuitous tactics".

Nyob rau theem pib ntawm kev tshawb fawb thiab kev loj hlob ntawm silicone roj hmab hauv Suav teb, tsis muaj kev nkag siab txog cov txheej txheem ntawm cov roj hmab silicone nyob rau sab hnub poob.Qee cov chav nyob tau sim cov nplhaib tseem ceeb qhib catalysts xws li sulfuric acid, ferric chloride, aluminium sulfate, thiab lwm yam. Ces, cov residual catalyst muaj nyob rau hauv pua pua txhiab tus molecular hnyav silica gel yog ntxuav nrog dej distilled ntawm ob lub menyuam, yog li nws yog ib txoj kev tsis zoo heev los siv qhov qhib-loop catalyst.

Zheng Shanzhong thiab Xu Mingshan, ob qho tib si ib ntus catalysts uas nkag siab txog cov khoom tshwj xeeb, xav tias nws muaj nws qhov kev xav tau thiab cov xwm txheej siab heev.Nws tuaj yeem tsis tsuas yog txhim kho zoo ntawm silicone roj hmab, tab sis kuj ua kom yooj yim rau kev ua haujlwm tom qab ua haujlwm.Lub sijhawm ntawd, cov tebchaws txawv tebchaws tseem tsis tau siv rau kev tsim khoom lag luam.Lawv txiav txim siab los ua ke tetramethyl ammonium hydroxide thiab tetrabutyl phosphonium hydroxide los ntawm lawv tus kheej, thiab muab piv rau lawv.Lawv xav tias yav dhau los yog qhov txaus siab dua, yog li cov txheej txheem polymerization tau lees paub.Tom qab ntawd, ntau pua kilograms ntawm pob tshab thiab ntshiab silicone roj hmab tau tsim los ntawm tus kheej tsim thiab tsim cov khoom siv tsav.Nyob rau lub Rau Hli 1961, Yang Guangqi, tus thawj coj ntawm Lub Chaw Haujlwm Thib Ob ntawm Ministry of chemical kev lag luam, tuaj rau lub Hoobkas los tshuaj xyuas thiab zoo siab heev uas tau pom cov khoom tsim nyog silicone roj hmab.Txawm hais tias tus nqi ntawm cov roj hmab uas tsim los ntawm txoj kev no yog qhov siab, cov roj hmab silicone uas tuaj yeem ua rau huab hwm coj tuaj yeem txo qhov kev xav tau ceev thaum lub sijhawm ntawd.

Shanghai resin Hoobkas, coj los ntawm Shanghai Chemical Industry Bureau, thawj zaug teeb tsa 400mm txoj kab uas hla stirring txaj hauv Suav teb los tsim methyl chlorosilane monomers.Nws yog ib lub lag luam uas tuaj yeem muab methyl chlorosilane monomers hauv cov khoom siv thaum lub sijhawm ntawd.Tom qab ntawd, txhawm rau txhawm rau txhawm rau txhim kho kev lag luam silicone hauv Shanghai thiab kho lub zog ntawm silicone, Shanghai Chemical Bureau merged Xincheng chemical plant nrog Shanghai resin cog, thiab txuas ntxiv mus ua qhov kev sim ntawm cov txheej txheem txuas ntxiv ntawm cov khoom siv kub kub vulcanized silicone. roj hmab.

Shanghai Chemical Industry Bureau tau teeb tsa lub rooj cob qhia tshwj xeeb rau cov roj silicone thiab silicone roj hmab ntau lawm hauv Shanghai resin Hoobkas.Shanghai resin Hoobkas tau ua tiav kev sim ua lub tshuab nqus tsev twj tso kua mis siab, ob chav ntsuas kub vulcanized silicone roj hmab, phenyl methyl silicone roj thiab lwm yam, uas raug txwv los ntawm txawv teb chaws.Shanghai resin Hoobkas tau dhau los ua lub Hoobkas muaj peev xwm tsim tau ntau yam khoom siv silicone hauv Suav teb.Txawm hais tias nyob rau xyoo 1992, vim yog kev hloov kho ntawm cov txheej txheem kev lag luam hauv Shanghai, Shanghai resin Hoobkas yuav tsum tau tawm ntawm kev tsim cov methyl chlorosilane thiab lwm yam monomers, thiab hloov pauv cov monomers thiab intermediates los tsim cov khoom lag luam qis.Txawm li cas los xij, Shanghai resin Hoobkas muaj qhov tsis tuaj yeem pab txhawb rau kev txhim kho organosilicon monomers thiab organosilicon polymer cov ntaub ntawv hauv Suav teb.


Post lub sij hawm: Sep-24-2022