Polyisobutylene (PIB)

Polyisobutylene (PIB)yog xim tsis muaj xim, tsis qab, tsis muaj kuab lom los yog cov khoom siv semi-tshuaj, tshav kub tsis kam, oxygen tsis kam, ozone tsis kam, huab cua tsis kam, ultraviolet tsis kam, acid thiab alkali tsis kam thiab lwm yam tshuaj ua haujlwm zoo.Polyisobutylene yog xim tsis muaj xim, tsis muaj ntxhiab, tsis muaj tshuaj lom isobutylene homopolymer.Vim muaj cov txheej txheem kev npaj sib txawv thiab cov txheej txheem thev naus laus zis, molecular Chemicalbook tus nqi ntawm polyisobutylene sib txawv hauv ntau yam.Feem ntau ntawm cov khoom hnyav ntawm cov khoom mus txog ntau dua 10,000 mus rau 200,000 yuav hloov los ntawm cov kua tuab mus rau ib nrab, thiab tom qab ntawd hloov mus rau cov roj hmab zoo li elastomer.Polyisobutylene tiv taus cov kua qaub, alkali, ntsev, dej, ozone thiab kev laus, thiab muaj huab cua nruj heev thiab hluav taws xob rwb thaiv tsev.

Chemical Properties:Cov xim tsis muaj xim rau lub teeb daj viscous kua lossis elastic rubbery semisolid (qhov hnyav molecular yog mos gelatinous, siab molecular hnyav yog ductile thiab elastic).Txhua yam tsis muaj ntxhiab tsw, tsw ntxhiab lossis tsw ntxhiab me ntsis.Qhov nruab nrab molecular hnyav yog 200,000 ~ 87 lab.Soluble nyob rau hauv benzene thiab diisobutyl Chemicalbook, yuav miscible nrog polyvinyl acetate, ciab, thiab lwm yam., insoluble nyob rau hauv dej, cawv thiab lwm yam polar solvents.Nws tuaj yeem ua rau cov pos hniav muaj qhov muag zoo heev ntawm qhov kub thiab txias, thiab muaj qee yam plasticity ntawm qhov kub thiab txias los ua qhov tsis zoo ntawm polyvinyl acetate thaum nws txias, huab cua kub thiab softening ntau dhau thaum nws ua tau raws li lub qhov ncauj kub.

Daim ntawv thov:PIB yog lub npe hu rau nws cov khoom zoo heev sealing thiab nplaum, uas feem ntau yog siv rau hauv cov nplaum, coatings, thiab sealants.PIB cov khoom zoo li roj hmab ua rau nws xaiv zoo heev rau kev sib khi thiab kev sib khi daim ntawv thov, vim nws pab muab kev ruaj khov thiab ruaj khov hauv ntau qhov chaw.Ntxiv rau nws qhov kev siv tau zoo, PIB feem ntau siv rau hauv cov tshuaj pleev ib ce thiab cov khoom tu tus kheej vim nws cov khoom zoo heev solubility.Cov khoom siv feem ntau ua ke nrog lwm cov khoom xyaw los tsim cov khoom lag luam nrog kev ntxhib los mos thiab kev xav.

PIB muaj ntau yam kev siv hauv kev lag luam khoom noj thiab.Cov khoom no feem ntau yog siv los ua cov thickener, stabilizer, thiab emulsifier hauv cov zaub mov tiav.PIB tseem tuaj yeem pab txhim kho qhov kev ntxhib los mos thiab sib xws ntawm cov khoom xws li ice cream, zom cov pos hniav, thiab cov khoom ci.Lub versatility ntawm PIB ua rau nws yog ib qho tseem ceeb muaj nyob rau hauv cov khw muag khoom noj.

PIB kuj tau siv dav hauv kev lag luam kho mob.Cov khoom tsis muaj tshuaj lom ua rau nws zoo tagnrho rau kev siv hauv kev kho mob.Cov tshuaj no feem ntau yog siv los ua ib qho stabilizer hauv cov tshuaj tiv thaiv, nrog rau cov khoom xyaw hauv ntau cov tshuaj.PIB's hydrophobic xwm pab nws ua raws li daim tawv nqaij, ua rau nws muaj txiaj ntsig zoo hauv kev tsim cov nplaum kho mob.

Yam ntxwv:Polyisobutylene muaj cov khoom siv tshuaj lom neeg ntawm saturated hydrocarbon tebchaw, thiab sab saw methyl pawg yog nruj symmetrical tis, uas yog ib tug tshwj xeeb polymer.Lub xeev aggregation thiab cov khoom ntawm polyisobutylene nyob ntawm nws qhov hnyav molecular thiab molecular hnyav faib.Thaum lub viscosity nruab nrab molecular hnyav nyob rau hauv thaj tsam ntawm 70000 ~ 90000, polyisobutylene transforms los ntawm ib tug tig kua rau ib tug elastic khoom.Feem ntau, raws li qhov loj ntawm qhov hnyav molecular ntawm polyisobutylene tau muab faib ua cov hauv qab no: qis molecular hnyav polyisobutylene (tus naj npawb nruab nrab molecular hnyav = 200-10000);Nruab nrab molecular hnyav polyisobutylene (tus naj npawb nruab nrab molecular hnyav = 20000-45,000);Siab molecular hnyav polyisobutylene (tus naj npawb nruab nrab molecular hnyav = 75,000-600,000);Ultra siab molecular hnyav polyisobutylene (tus naj npawb ntawm qhov nruab nrab molecular hnyav dua 760000).

1. Cua nruj

Ib qho ntawm cov yam ntxwv zoo ntawm polyisobutylene yog nws cov huab cua nruj heev.Vim muaj ob pawg methyl hloov pauv, cov saw hlau molecular txav qeeb thiab qhov ntim dawb me me.Qhov no ua rau lub diffusion coefficient tsawg thiab roj permeability.

2. Solubility

Polyisobutylene yog soluble hauv aliphatic hydrocarbon, aromatic hydrocarbon, roj av, naphthene, ntxhia roj, chlorinated hydrocarbon thiab carbon monosulfide.Ib nrab yaj nyob rau hauv ntau dua cawv thiab cheeses, los yog o nyob rau hauv alcohols, ethers, monomers, ketones thiab lwm yam kuab tshuaj thiab tsiaj thiab zaub roj, lub degree ntawm o nce nrog rau qhov nce ntawm hnyav carbon saw ntev;Insoluble hauv qis cawv (xws li methanol, ethanol, isopropyl cawv, ethylene glycol thiab coethylene glycol), ketones (xws li acetone, methyl ethyl ketone) thiab glacial acetic acid.

3. Tshuaj tiv thaiv

Polyisobutylene tiv taus acid thiab alkali.Xws li ammonia, hydrochloric acid, 60% hydrofluoric acid, lead acetate aqueous tov, 85% phosphoric acid, 40% sodium hydroxide, saturated ntsev dej, 800} sulfuric acid, 38% sulfuric acid + 14% nitric acid yaig, Txawm li cas los, nws tsis tuaj yeem tiv taus cov oxidants muaj zog, kub tsis muaj zog oxidants (xws li 60% poov tshuaj permanganate), qee cov organic acids kub (xws li 373K acetic acid) thiab halogens (fluorine, chlorine, suab puam).

Ntim: 180KG nruas

Cia: Khaws rau hauv qhov chaw txias, qhov cua, qhuav nrog lub hnub tiv thaiv thaum thauj.

Hauv kev xaus, PIB yog cov khoom muaj txiaj ntsig nrog ntau yam kev siv hauv ntau yam lag luam.Nws zoo heev sealing thiab nplaum cov khoom, nrog rau nws solubility thiab versatility, ua rau nws zoo tagnrho rau kev siv nyob rau hauv cov tshuaj pleev ib ce, kev tu tus kheej, zaub mov, thiab kev kho mob industries.Raws li tus neeg muab khoom lag luam ntawm PIB, peb tau mob siab rau muab peb cov neeg siv khoom nrog cov khoom zoo tshaj plaws thiab cov kev pabcuam kom tau raws li lawv cov kev xav tau ntawm kev lag luam.