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Soo koobida mabaadi'da xulashada monomer ee isku dhafka resins acrylic

Si loo fududeeyo codsiga, monomer-yada polymeric waxaa badanaa loo kala saaraa saddex qaybood oo waaweyn: monomers adag, monomers jilicsan iyo monomers functional.Methyl methacrylate (MMA), styrene (ST), iyo akril isha (AN) ayaa ah kuwa ugu badan ee la isticmaalo monomers adag, halka ethyl acrylate (EA), butyl acrylate (BA), iyo isoctyl acrylate (2-EHA) ay yihiin kuwa ugu badan. loo isticmaalo monomers jilicsan.

Aashitada silsiladda dheer ee acrylic acid iyo methacrylic esters (sida lauryl iyo octadecyl esters) waxay leeyihiin caabbinta khamriga iyo biyaha iska caabbinta wanaagsan.

monomers functional waa acrylates iyo methacrylates oo ka kooban kooxaha hydroxyl, iyo monomers ka kooban kooxaha karboxyl waa acrylic acid iyo methacrylic acid.Soo bandhigida kooxaha hydroxyl waxay siin karaan kooxo shaqaynaysa resins-ku-salaysan dareeraha leh wakiilada daaweynta poliurethane iyo xabagta amino ee isku xidhka.monomers kale oo shaqeynaya waa: acrylamide (AAM), hydroxymethylacrylamide (NMA), diacetone acrylamide (DAAM) iyo ethyl acetoacetate methacrylate (AAEM), glycidyl methacrylate (GMA), dimethylaminoethyl methacrylate (DMAEMA), vinyl siloxananeth astrivinsilyloxystrivinsilyloxystrivinsil, trivinsilyloxystrivinsil. (2-methoxyethoxy) silane, vinyl triisopropoxy silane, γ-methyl propionyloxypropyl trimethoxysilane, γ-methyl propionyloxypropyl tri(β-trimethoxyethoxy silane) monomer, iwm. Qadarka monomer functional waxaa guud ahaan lagu xakameeyaa 1% ~ 6% saamiga (mass ratio). Vinyl triisopropoxysilane monomer sababtoo ah saamaynta isopropyl site-blocking, Si-O bond hydrolysis gaabis ah, qadarka waxaa lagu kordhin karaa ilaa 10% ee emulsion polymerization, taas oo ah mid waxtar leh. Si loo hagaajiyo caabbinta biyaha ee emulsions, cimilada iyo guryaha kale, laakiin qiimihiisa ayaa ka sarreeya Emulsion polymerization monomer, diacetone acrylamide (DAAM), ethyl acetoacetMethacrylate cunay (AAEM) waxay u baahan tahay in la isticmaalo dhamaadka polymerization oo lagu daray hexanediyl dihydrazide, xarunta hexanediamine, uumiga biyaha ayaa ku jiri kara buundada silsiladda macromolecular ee u dhaxaysa samaynta filim iskutallaab ah.

Carboxyl monomer oo ay ku jiraan acrylic acid iyo methacrylic acid, soo bandhigida kooxaha karboksylku waxay hagaajin karaan resin si midabka, buuxinta qoynta iyo adhesion ee substrate-ka, iyo kooxda epoxy waxay leedahay falcelin, daawaynta resins amino waxay leedahay firfircooni firfircoon.Maaddada karboksyl ee xabagta waxaa caadi ahaan loo isticmaalaa qiimaha aashitada (AV), taas oo ah, tirada milligaraam ee KOH ee loo baahan yahay si loo baabi'iyo 1g resin, unugga mgKOH/g (resin adag), xakamaynta guud ee AV ee ku saabsan 10mgKOH/g (adag). xabagta), nidaamka poliurethane, AV wax yar ka hooseeya, xabagta amino leh AV way weynaan kartaa, si kor loogu qaado isku-xidhka.

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Marka la isku dhejiyo resin hydroxy acrylic, nooca iyo cadadka hydroxyl monomer ayaa saameyn muhiim ah ku leh waxqabadka xajinta.Qaybta hydroxy acrylic acid ee nidaamka polyurethane ee laba qaybood ka kooban ayaa caadi ahaan loo isticmaalaa sidii monomer hydroxyl aasaasiga ah: hydroxyethyl acrylate (HEA) ama hydroxyethyl methacrylate (HEMA);Qaybta hydroxy acrylic acid ee rinjiga dubista amino waxaa caadi ahaan loo isticmaalaa sidii monomer sare oo hydroxyl: acrylic acid-β-hydroxypropyl ester (HPA) ama methacrylic acid-β-hydroxypropyl ester (HPMA).Dhaqdhaqaaqa monomer-ka ayaa sarreeya, iyo resin-ka hydroxypropyl ee lagu sameeyay waxaa loo isticmaalaa sida qaybta hydroxyl ee lacquer dubista amino, taas oo saameynaysa kaydinta lacquer,
dooro monomer-ka sare ee hydroxypropyl.Sanadihii la soo dhaafay, waxaa jira qaar ka mid ah monomers hydroxyl cusub, sida acrylic acid ama hydroxybutyl methacrylate, hydroxyethyl methacrylate iyo ε-caprolactone lagu daro (1: 1 ama 1: 2 mol ratio, Dow Chem Company).Resins-ka lagu sameeyay isku-darka hydroxyethyl methacrylate iyo ε-caprolactone waxay leeyihiin viscosity hoose, waxaana lagu gaari karaa dheelitirnaan wanaagsan oo qallafsanaanta iyo dabacsanaanta.Intaa waxaa dheer, soo bandhigida kooxaha hydroxyl dhamaadka silsiladda macromolecular ee wakiilada wareejinta silsiladaha nooca hydroxyl (sida mercaptoethanol, mercaptopropanol, iyo 2-hydroxyethyl mercaptopropionate) waxay wanaajisaa qaybinta kooxaha hydroxyl, waxay kordhisaa adkaanta, waxayna hoos u dhigtaa unugyada molecular. qaybinta miisaanka, yaraynta viscosity ee nidaamka.

Si loo hagaajiyo caabbinta ethanol si loo soo bandhigo styrene, acrylate iyo methacrylic acid alkyl esters horumarsan si loo yareeyo waxa ku jira kooxda esterka.Labadaba waxaa loo tixgelin karaa inay isku dheelitiraan cimilada iyo iska caabbinta ethanol.Methacrylic acid horumarsan alkyl esters waa lauryl methacrylate, octadecyl methacrylate, iwm., monomer-yadani waxay inta badan ku tiirsan yihiin soo dejinta.

C resins ee dahaarka inta badan waa copolymers, iyo waxqabadkooda isku-dabaynta waa in la tixgeliyaa marka la dooranayo monomers.Sababo la xiriira qaabdhismeedka monomer kala duwan, dhaqdhaqaaqa copolymerization waa ka duwan yahay, Halabuurka kobolymer leh halabuurka monomer sida caadiga ah ka duwan yahay, binary, terpolymerization, waxay la xiriiri karaa iyada oo loo marayo isla'egta halabuurka copolymer.Copolymers badan oo kala duwan, ma jiraan isle'eg xiriir wanaagsan oo la heli karo, kaliya iyada oo loo marayo daraasado tijaabo ah, falanqayn gaar ah oo dhibaatooyin gaar ah.Ficil ahaan, habka quudinta "gaajo" isku darka monomer (ie, heerka quudinta monomer

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Lagu turjumay www.DeepL.com/Translator (nooca bilaashka ah)
Haddii aysan jirin wax qiimo ah oo ku saabsan qiimaha polymerization, Q iyo e qiimaha monomer waxaa loo isticmaali karaa si loo xisaabiyo heerka polymerization, ama si toos ah u isticmaalaan Q iyo e si fudud u qiimeeyaan waxqabadka isku-duubnida, monomer-ka guud ee isku-kalsoonida qiimaha Q ma noqon karo mid aad u kala duwan. haddii kale way adag tahay in la isku daro;Marka qiimaha e uu ka duwan yahay, way fududahay in la beddelo isku-duubnida, qaar ay adag tahay in la isku koobo monomerka iyadoo lagu darayo qiimaha dhexe ee Q ee monomer, waxay hagaajin kartaa waxqabadka kobolymerization.

Xulashada monomer waa inay sidoo kale fiiro gaar ah u leedahay xajmiga sunta monomer, sunta guud ee acrylate waa ka weyn tahay sunta methacrylate u dhiganta, sida methyl acrylate toxicity waxay ka weyn tahay sunta methyl methacrylate, marka lagu daro sunta ethyl acrylate. ayaa sidoo kale ka weyn.

Lagu turjumay www.DeepL.com/Translator (nooca bilaashka ah)

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Waqtiga boostada: Agoosto-22-2021