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Kakaretso ea melao-motheo ea khetho ea monomer ka motsoako oa li-resin tsa acrylic

Bakeng sa ts'ebeliso e bonolo, li-monomers tsa polymeric hangata li aroloa ka mekhahlelo e meraro: li-monomer tse thata, li-monomer tse bonolo le li-monomers tse sebetsang.Methyl methacrylate (MMA), styrene (ST), le acrylic eye (AN) ke tsona tse sebelisoang haholo ka thata monomers, ha ethyl acrylate (EA), butyl acrylate (BA), le isooctyl acrylate (2-EHA) ke tsona tse atileng haholo. e sebelisitsoeng li-monomers tse bonolo.

Long-chain acrylic acid le methacrylic esters (tse kang lauryl le octadecyl esters) li na le ho hanyetsa joala ho molemo le ho thibela metsi.

Li-monomers tse sebetsang ke li-acrylate le methacrylates tse nang le lihlopha tsa hydroxyl, 'me li-monomer tse nang le lihlopha tsa carboxyl ke acrylic acid le methacrylic acid.Ho kenyelletsoa ha lihlopha tsa hydroxyl ho ka fana ka lihlopha tse sebetsang bakeng sa li-resin tse thehiloeng ho solvent tse nang le polyurethane e phekolang le li-amino resin bakeng sa ho hokahanya.Li-monomers tse ling tse sebetsang ke: acrylamide (AAM), hydroxymethylacrylamide (NMA), diacetone acrylamide (DAAM) le ethyl acetoacetate methacrylate (AAEM), glycidyl methacrylate (GMA), dimethylaminoethyl methacrylate (DMAEMA), vinyl siloxanes, vinylsimethony vinyltrilanes, vinylsithoethoethone e le 'ngoe (2-methoxyethoxy) silane, vinyl triisopropoxy silane, γ-methyl propionyloxypropyl trimethoxysilane, γ-methyl propionyloxypropyl tri(β-trimethoxyethoxy silane) monomer, joalo-joalo Palo ea monomer e sebetsang ka kakaretso e laoloa ka karolelano ea 1% ~ 6% (boima) , eseng haholo, ho seng joalo e ka ama botsitso ba polokelo ea resin kapa pente Vinyl triisopropoxysilane monomer ka lebaka la phello ea isopropyl ea ho thibela sebaka, Si-O bond hydrolysis butle-butle, chelete e ka eketsoa ho 10% ka polymerization ea emulsion, e leng molemo. ho ntlafatsa ho hanyetsa metsi ha li-emulsion, boemo ba leholimo le thepa e 'ngoe, empa theko ea eona e phahame.e jele methacrylate (AAEM) e hloka ho sebelisoa qetellong ea polymerization hammoho le hexanediyl dihydrazide, motsoako oa hexanediamine, mouoane oa metsi o ka ba ka har'a borokho ba ketane ea macromolecular pakeng tsa ho thehoa ha filimi e amanang le sefapano.

Carboxyl monomer e nang le acrylic acid le methacrylic acid, kenyelletso ea lihlopha tsa carboxyl e ka ntlafatsa resin ho 'mala, ho koloba ha metsi le ho khomarela substrate,' me ka sehlopha sa epoxy se na le ts'ebetso, pholiso ea li-amino resins e na le ts'ebetso e matla.Likahare tsa carboxyl tsa resin hangata li sebelisoa boleng ba acid (AV), ke hore, palo ea limiligrama tsa KOH tse hlokahalang ho fokotsa resin ea 1g, unit mgKOH/g (solid resin), taolo e akaretsang ea AV e ka bang 10mgKOH/g (e tiileng. resin), sisteme ea polyurethane, AV e tlase hanyane, resin ea amino e nang le AV e ka ba kholo, ho khothaletsa ho hokahanya.

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Ha ho etsoa resin ea hydroxy acrylic resin, mofuta le bongata ba hydroxyl monomer li na le tšusumetso ea bohlokoa ts'ebetsong ea resin.Karolo ea hydroxy acrylic acid ea likarolo tse peli tsa polyurethane tsamaiso e atisa ho sebelisoa e le monoma ea mantlha ea hydroxyl: hydroxyethyl acrylate (HEA) kapa hydroxyethyl methacrylate (HEMA);karolo ea hydroxy acrylic acid ea pente ea ho baka ea amino hangata e sebelisoa e le monoma ea bobeli ea hydroxyl: acrylic acid-β-hydroxypropyl ester (HPA) kapa methacrylic acid-β-hydroxypropyl ester (HPMA).Mosebetsi oa monoma o phahame, 'me resin ea hydroxypropyl e entsoeng ke eona e sebelisoa e le karolo ea hydroxyl ea lacquer ea ho baka ea amino, e amang ho boloka lacquer,
khetha monoma ea bobeli ea hydroxypropyl.Lilemong tsa morao tjena, ho na le tse ling tse ncha tsa hydroxyl monomers, tse kang acrylic acid kapa hydroxybutyl methacrylate, hydroxyethyl methacrylate le ε-caprolactone tlatsetso (1:1 kapa 1:2 mol ratio, Dow Chem Company).Li-resin tse entsoeng ka ho eketsoa ha hydroxyethyl methacrylate le ε-caprolactone li na le viscosity e tlaase, 'me ho ka finyelloa ho leka-lekana ho thata le ho feto-fetoha ha maemo.Ntle le moo, ho hlahisoa ha lihlopha tsa hydroxyl qetellong ea ketane ea macromolecular ke li-agent tsa phetisetso ea mofuta oa hydroxyl (joalo ka mercaptoethanol, mercaptopropanol, le 2-hydroxyethyl mercaptopropionate) e ntlafatsa kabo ea lihlopha tsa hydroxyl, e eketsa boima, 'me e fokotsa molek'hule. kabo ea boima, ho fokotsa viscosity ea sistimi.

Ho ntlafatsa khanyetso ea ethanol ho hlahisa styrene, acrylate le methacrylic acid e tsoetseng pele ea alkyl esters ho fokotsa litaba tsa sehlopha sa ester.Ka bobeli li ka nkoa li leka-lekanya boemo ba leholimo le ho hanyetsa ethanol.Methacrylic acid e tsoetseng pele ea alkyl esters ke lauryl methacrylate, octadecyl methacrylate, joalo-joalo, li-monomers tsena li itšetlehile haholo ka thepa e tsoang kantle ho naha.

Li-resin tsa C bakeng sa ho roala hangata ke li-copolymers, 'me mosebetsi oa bona oa copolymerization o tlameha ho nkoa ha u khetha monomers.Ka lebaka la sebopeho se fapaneng sa monoma, ts'ebetso ea copolymerization e fapane, sebopeho sa copolymer se nang le motsoako oa monoma hangata se fapane, bakeng sa binary, terpolymerization, li ka amahanngoa ka equation ea copolymer.Bakeng sa li-copolymer tse ngata tse fapaneng, ha ho na equation e ntle ea khokahano e fumanehang, feela ka lithuto tsa liteko, tlhahlobo e khethehileng ea mathata a itseng.Ha e le hantle, mokhoa oa ho fepa oa monomer "tlala" (ke hore monomer feeding rate < copolymerization rate) o sebelisoa ka kakaretso ho laola sebopeho sa copolymer.E le ho etsa hore copolymerization e be bonolo, copolymerization e nang le motsoako oa monomer polymerization rate ha ea lokela ho ba e fapaneng haholo, joalo ka styrene e nang le vinyl acetate, vinyl chloride, leihlo la propylene ho thata ho copolymerize.E tlameha ho kopanngoa le phapang e kholo mosebetsing oa monoma, o ka eketsa monoma bakeng sa phetoho, ke hore, ho eketsa monoma, 'me monoma le tekanyo e meng ea monoma ea polymerization e batla e le haufi le copolymerization ea molemo, styrene le acrylate ho thata ho e etsa. copolymerize, ho eketsa acrylate monoma ho ka ntlafatsa copolymerization ea bona.

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E fetoletsoe ka www.DeepL.com/Translator (mofuta oa mahala)
Haeba ho se na boleng ba sekhahla sa polymerization, boleng ba Q le e ba monoma bo ka sebelisoa ho bala sekhahla sa polymerization, kapa ho sebelisa Q le e ka kotloloho ho lekola ts'ebetso ea copolymerization, kakaretso ea copolymerization monomer Q boleng e ke ke ea fapana haholo, ho seng joalo ho thata ho copolymerize;ha boleng ba e bo fapane, ho bonolo ho fetola copolymerization, ho thata ho etsa copolymerize monoma ka ho eketsa boleng ba Q ea monoma, ho ka ntlafatsa ts'ebetso ea copolymerization.

Khetho ea monomer e boetse e lokela ho ela hloko boholo ba chefo ea monoma, chefo e akaretsang ea acrylate e kholo ho feta chefo ea methacrylate e lumellanang, joalo ka methyl acrylate toxicity e kholo ho feta chefo ea methyl methacrylate, ho phaella ho chefo ea ethyl acrylate. e boetse e kholoanyane.

E fetoletsoe ka www.DeepL.com/Translator (mofuta oa mahala)

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Nako ea poso: Aug-22-2021