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Pfupiso yemisimboti yekusarudzwa kwemonomeri mune synthesis ye acrylic resins

Kuti zvive nyore kushandisa, mapolymeric monomers anowanzo kuiswa muzvikamu zvitatu zvikuru: zvakaoma monomers, zvinyoro monomers uye zvinoshanda monomers.Methyl methacrylate (MMA), styrene (ST), uye acrylic eye (AN) ndiwo anonyanya kushandiswa akaoma monomers, nepo ethyl acrylate (EA), butyl acrylate (BA), uye isooctyl acrylate (2-EHA) ndiwo anonyanya kushandiswa. akashandisa nyoro monomers.

Long-chain acrylic asidhi uye methacrylic esters (senge lauryl uye octadecyl esters) ane zviri nani kuramba doro uye kuramba mvura.

Anoshanda monomers ma acrylates uye methacrylates ane hydroxyl mapoka, uye monomers ane carboxyl mapoka ari acrylic asidhi uye methacrylic acid.Kuunzwa kwemapoka ehydroxyl kunogona kupa mapoka anoshanda ezvinonyungudutsa-based resins ane polyurethane anorapa ejenti uye amino resins yekuyambuka-kubatanidza.Mamwe mamonmers anoshanda ndeaya: acrylamide (AAM), hydroxymethylacrylamide (NMA), diacetone acrylamide (DAAM) uye ethyl acetoacetate methacrylate (AAEM), glycidyl methacrylate (GMA), dimethylaminoethyl methacrylate (DMAEMA), vinyl siloxanes,vinylsimethothon seroxane,vinylsithoethorojeni (2-methoxyethoxy) silane, vinyl triisopropoxy silane, γ-methyl propionyloxypropyl trimethoxysilane, γ-methyl propionyloxypropyl tri(β-trimethoxyethoxy silane) monomer, etc. Kuwanda kwekushanda monoma kunowanzodzorwa pa 1% ~ 6% (mass ratio) , kwete yakawandisa, zvikasadaro inogona kukanganisa kuchengetedza kugadzikana kwe resin kana pendi. kuvandudza kudzivirira kwemvura kwe emulsion, mamiriro ekunze uye zvimwe zvivakwa, asi mutengo wayo wakakwira.. Emulsion polymerization monomer, diacetone acrylamide (DAAM), ethyl acetoacetakadya methacrylate (AAEM) inoda kushandiswa nekuguma kwepolymerization pamwe nehexanediyl dihydrazide, hexanediamine compound, mvura inoputika inogona kuva mu macromolecular chain bridge pakati pekugadzirwa kwemuchinjika-yakabatana firimu.

Carboxyl monomer ine acrylic acid uye methacrylic acid, kuunzwa kwemapoka ecarboxyl kunogona kuvandudza resin kune ruvara, kunyorova kwekuzadza uye kunamatira kune substrate, uye neboka reepoxy rine reactivity, kurapwa kweamino resins kune inokonzeresa chiitiko.Iyo carboxyl yemukati yeresin inowanzo shandiswa asidhi kukosha (AV), ndiko kuti, nhamba yemamilligrams eKOH inodiwa kuita neutralize 1g resin, unit mgKOH/g (solid resin), iyo general AV control inosvika 10mgKOH/g (yakasimba. resin), polyurethane system, AV zvishoma yakaderera, amino resin ine AV inogona kunge yakakura, kukurudzira kuyambuka-kubatanidza.

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Kana uchigadzira hydroxy acrylic resin, rudzi uye huwandu hwehydroxyl monomer zvine simba rakakosha pakuita resin.Iyo hydroxy acrylic acid chikamu chezvikamu zviviri zve polyurethane system inowanzoshandiswa seyokutanga hydroxyl monomer: hydroxyethyl acrylate (HEA) kana hydroxyethyl methacrylate (HEMA);iyo hydroxy acrylic acid component yeamino baking paint inowanzoshandiswa sechipiri hydroxyl monomer: acrylic acid-β-hydroxypropyl ester (HPA) kana methacrylic acid-β-hydroxypropyl ester (HPMA).Chiitiko chemonomer chakakwira, uye iyo hydroxypropyl resin yakagadziriswa nayo inoshandiswa seiyo hydroxyl chikamu cheamino baking lacquer, iyo inokanganisa kuchengetwa kwelacquer, inogona.
sarudza yechipiri hydroxypropyl monomer.Mumakore achangopfuura, kune mamwe matsva ehydroxyl monomers, akadai se acrylic acid kana hydroxybutyl methacrylate, hydroxyethyl methacrylate uye ε-caprolactone kuwedzera (1: 1 kana 1: 2 mol ratio, Dow Chem Company).Iyo resin inogadzirwa nekuwedzera kwehydroxyethyl methacrylate uye ε-caprolactone ine yakaderera viscosity, uye kuenzana kwakanaka kwekuoma uye kuchinjika kunogona kuwanikwa.Mukuwedzera, kuiswa kwemapoka e-hydroxyl pamagumo e-macromolecular chain ne-hydroxyl-type chain transfer agents (yakadai se mercaptoethanol, mercaptopropanol, uye 2-hydroxyethyl mercaptopropionate) inovandudza kugoverwa kwemapoka e-hydroxyl, inowedzera kuoma, uye inoderedza molecular. kugovera uremu, kuderedza viscosity yehurongwa.

Kuvandudza ethanol kuramba kuunza styrene, acrylate uye methacrylic acid yepamusoro alkyl esters kuderedza ester boka remukati.Ose ari maviri anogona kutariswa kuenzanisa mamiriro ekunze uye ethanol kuramba.Methacrylic acid advanced alkyl esters is lauryl methacrylate, octadecyl methacrylate, nezvimwewo, mamonomers aya anonyanya kuvimba nekutenga kunze kwenyika.

C resins yekuputira inowanzova copolymers, uye basa ravo re copolymerization rinofanira kutariswa pakusarudza monomers.Nekuda kwechimiro chakasiyana chemonomeri, chiitiko checopolymerization chakasiyana, kuumbwa kwecopolymer ine monomer musanganiswa kuumbwa kunowanzo siyana, yebhinari, terpolymerization, inogona kuenderana kuburikidza neiyo copolymer kuumbwa equation.Kune akawanda akasiyana-siyana macopolymers, hapana yakanaka correlation equation iripo, chete kuburikidza nezvidzidzo zvekuyedza, ongororo chaiyo yematambudziko chaiwo.Mukuita, monomer musanganiswa "nzara" yekudyisa nzira (kureva monomer feeding rate

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Yakaturikirwa newww.DeepL.com/Translator (yemahara vhezheni)
Kana pasina kukosha kwehuwandu hwepolymerization, iyo Q uye e kukosha kwemonomeri inogona kushandiswa kuverenga chiyero chepolymerization, kana kushandisa zvakananga Q uye e kungoongorora chiitiko checopolymerization, iyo yakawanda copolymerization monomer Q kukosha haigone kusiyana zvakanyanya, kana zvisina kudaro zvakaoma copolymerize;kana kukosha kwe e kwakasiyana, zviri nyore kushandura copolymerization, zvimwe zvakaoma kutevedzera monomer nekuwedzera yepakati Q kukosha kwemonomeri, inogona kuvandudza mashandiro ecopolymerization.

Kusarudzwa kweMonomer kunofanirwawo kutarisisa kuhukuru hwemonomer toxicity, iyo general acrylate toxicity yakakura kupfuura huturu hweiyo methacrylate inoenderana, senge methyl acrylate toxicity yakakura kupfuura huturu hwemethyl methacrylate, kuwedzera kune huturu hwe ethyl acrylate. mukuruwo.

Yakaturikirwa newww.DeepL.com/Translator (yemahara vhezheni)

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Nguva yekutumira: Aug-22-2021