Polyisobutylene (PIB)waa mid aan midab lahayn, dhadhamin, dhumucdiisuna aysan sun ahayn ama nus-adag, iska caabin kulaylka, caabbinta oksijiinta, caabbinta ozone, caabbinta cimilada, caabbinta ultraviolet, caabbinta acid iyo alkali iyo kiimikooyinka kale ee waxqabadka wanaagsan.Polyisobutylene waa mid aan midab lahayn, ur lahayn, aan sun ahayn isobutylene homopolymer.Sababo la xiriira hababka diyaarinta ee kala duwan iyo xaaladaha tignoolajiyada, cadadka buugga Kiimikada kelli ee polyisobutylene way ku kala duwan tahay tiro balaadhan.Inta badan miisaanka kelli ee badeecadu gaadho in ka badan 10,000 ilaa 200,000 waxa loo rogi doonaa dareere dhumuc weyn leh oo loo beddelayo mid adag, ka dibna waxa loo gudbi doonaa elastomer-ka caag u eg.Polyisobutylene waxay u adkaysataa aashitada, alkali, milixda, biyaha, ozone iyo gabowga, waxayna leedahay cidhiidhi hawo oo aad u fiican iyo dahaarka korantada.
Waxyaabaha kiimikaad:dareere viscous huruud ah oo aan midab lahayn ama khafiif ah ama caag laastikada semisolid (miisaanka kelli ee hooseeya waa jelatin jilicsan, miisaanka unugyo sare waa ductile iyo laastikada).Dhammaan ur aan ur lahayn, ur lahayn ama wax yar oo ur ah.Celceliska miisaanka kelli waa 200,000 ~ 87 milyan.Ku milmay benzene iyo diisobutyl Kiimikada, waxa lagu simi karaa polyvinyl acetate, wax, iwm, oo aan lagu milmin biyaha, khamriga iyo dareerayaasha kale ee polar.Waxay ka dhigi kartaa sonkorta cirridku inay yeelato jilicsanaan heerkul hooseeya, waxayna leedahay caag gaar ah oo heerkul sare ah si ay u buuxiso cilladaha polyvinyl acetate marka ay qabowdahay, cimilada kulul iyo jilicsanaanta xad dhaafka ah marka ay la kulanto heerkulka afka.
Codsiyada:PIB waxa ay caan ku tahay xidhidhaheeda wanaagsan iyo sifada xabagta, kuwaas oo inta badan loo isticmaalo xabagta, dahaarka, iyo xidhmooyinka.Guryaha caagga u eg ee PIB ayaa ka dhigaya doorasho aad u wanaagsan xirida iyo isku xirka codsiyada, maadaama ay gacan ka geysaneyso bixinta dammaanad adag oo waara meelo badan.Marka laga soo tago adeegsigeeda dhabta ah, PIB waxaa caadi ahaan loo isticmaalaa waxyaabaha la isku qurxiyo iyo walxaha daryeelka shakhsi ahaaneed iyadoo ay ugu wacan tahay sifooyinkeeda milmay ee wanaagsan.Walaxda waxaa inta badan lagu daraa maaddooyinka kale si loo abuuro alaab leh muuqaal iyo dareen gaar ah.
PIB waxay leedahay codsiyo kala duwan oo kala duwan oo ku jira warshadaha cuntada sidoo kale.Walaxda waxaa caadi ahaan loo isticmaalaa sidii dhumuye, xasiliye, iyo emulsifier ee cuntooyinka warshadaysan.PIB waxa kale oo ay kaa caawin kartaa in ay hagaajiso qaabka iyo joogteynta alaabta sida jalaatada, xanjada, iyo alaabta la dubay.Kala duwanaanta PIB waxay ka dhigaysaa shay lagama maarmaan u ah soosaarayaasha warshadaha cuntada.
PIB sidoo kale si weyn ayaa looga isticmaalaa warshadaha caafimaadka.Waxyaabaha aan sunta ahayn ee walaxda ayaa ka dhigaya mid ku habboon in loo isticmaalo codsiyada caafimaadka.Walaxda waxaa inta badan loo isticmaalaa sida xasiliye ee tallaalada, iyo sidoo kale qayb ka mid ah daawooyinka badan.Dabeecadda hydrophobic ee PIB waxay ka caawisaa inay ku dhegganaato maqaarka, taasoo ka dhigaysa mid waxtar u leh soo saarista xabagta caafimaadka.
Astaamaha:Polyisobutylene waxay leedahay sifooyinka kiimikada ee xeryahooda hydrocarbon ee saturated, iyo kooxda methyl silsilad si adag u qaybin, taas oo ah polymer gaar ah.Xaaladda isku-darka iyo sifooyinka polyisobutylene waxay ku xiran tahay culeyskeeda kelli iyo qaybinta miisaanka kelliyada.Marka celceliska viscosity miisaanka kelli uu ku jiro inta u dhaxaysa 70000 ~ 90000, polyisobutylene waxay ka beddeshaa dareere roganaya una beddelo mid adag.Guud ahaan, marka loo eego cabbirka miisaanka molecular ee polyisobutylene waxa loo qaybiyaa taxanaha soo socda: Miisaanka molecular hoose ee polyisobutylene (lambar celceliska miisaanka kelli = 200-10000);Miisaanka unugyadu dhexdhexaadka yahay polyisobutylene (lambar celceliska miisaanka kelli = 20000-45,000);Miisaanka molecular sare polyisobutylene (tirada celceliska miisaanka kelli = 75,000-600,000);Miisaanka molecular aadka u sarreeya ee polyisobutylene (tirada celceliska miisaanka kelli ka weyn 760000).
1. Cidhiidhiga hawada
Mid ka mid ah sifooyinka ugu caansan ee polyisobutylene waa cidhiidhigeeda hawada ugu fiican.Sababtoo ah joogitaanka laba kooxood oo methyl ah oo la beddelay, dhaqdhaqaaqa silsiladda molecular waa mid gaabis ah oo mugga xorta ah waa yar yahay.Tani waxay keenaysaa isku xidhka fidinta faafinta oo hooseeya iyo dabar-goynta gaaska.
2. Solubility
Polyisobutylene waxay ku milmi kartaa hydrocarbon aliphatic, hydrocarbon udgoon, gaaska, naphthene, saliida macdanta, hydrocarbon koloriin ah iyo carbon monosulfide.Qayb ahaan lagu milmay khamriga sare iyo farmaajo, ama bararsan khamriga, ethers, monomers, ketones iyo dareerayaasha kale iyo saliidaha xayawaanka iyo khudradda, heerka bararka wuxuu kordhiyaa korodhka dhererka silsiladda kaarboonka;Aalkolada hoose (sida methanol, ethanol, isopropyl alkohol, ethylene glycol iyo coethylene glycol), ketones (sida acetone, methyl ethyl ketone) iyo glacial acetic acid.
3. caabbinta kiimikada
Polyisobutylene waxay u adkaysataa aashitada iyo alkali.Sida ammonia, hydrochloric acid, 60% hydrofluoric acid, lead acetate xal aqueous, 85% phosphoric acid, 40% sodium hydroxide, biyo cusbo ah oo buuxa, 800} sulfuric acid, 38% sulfuric acid +14% nitric acid nabaad guurka, Si kastaba ha ahaatee, waa ma iska caabin karo nabaad-guurka oksaydhiyeyaasha xooggan, oksaydhiyeyaasha daciifka ah ee kulul (sida 60% potassium permanganate), qaar ka mid ah asiidhyada organic diirran ee kulul (sida 373K acetic acid) iyo halogens (fluorine, chlorine, saxaraha).
Xirmooyinka: 180KG durbaan
Kaydinta: Ku kaydi meel qabow, hawo leh, oo qalalan oo leh ilaalinta qorraxda inta lagu jiro gaadiidka.
Gabagabadii, PIB waa walax qiimo leh oo leh codsiyo badan oo warshado kala duwan ah.Shaabaddeeda ugu fiican iyo guryaha dhejiska ah, iyo sidoo kale milanka iyo kala-duwanaanta, waxay ka dhigaysaa mid ku habboon codsiyada gudaha qurxinta, daryeelka shakhsi ahaaneed, cuntada, iyo warshadaha caafimaadka.Anaga oo hormuud u ah alaab-qeybiyaha PIB, waxaan u heellannahay inaan siino macaamiisheena alaabada iyo adeegyada ugu tayada sarreeya si ay u daboolaan baahiyahooda warshadaha.
Waqtiga boostada: Juun-19-2023