Ukuze kube lula ukusetshenziswa, ama-polymeric monomers ngokuvamile ahlukaniswa ngezigaba ezintathu eziyinhloko: ama-monomer aqinile, ama-monomer athambile kanye nama-monomers asebenzayo.I-Methyl methacrylate (MMA), i-styrene (ST), ne-acrylic eye (AN) ama-monomer aqinile asetshenziswa kakhulu, kuyilapho i-ethyl acrylate (EA), i-butyl acrylate (BA), ne-isooctyl acrylate (2-EHA) ijwayeleke kakhulu. wasebenzisa ama-monomer athambile.
I-acrylic acid yamaketanga amade nama-methaacrylic esters (afana ne-lauryl ne-octadecyl esters) anokumelana notshwala okungcono futhi amelana namanzi.
Ama-monomer asebenzayo ama-acrylate nama-methacrylate aqukethe amaqembu e-hydroxyl, futhi ama-monomer aqukethe amaqembu e-carboxyl ayi-acrylic acid ne-methacrylic acid.Ukwethulwa kwamaqembu e-hydroxyl kunganikeza amaqembu asebenzayo ama-resin asekelwe ku-solvent ane-polyurethane elaphayo kanye nama-amino resins ukuze axhumane.Amanye ama-monomers asebenzayo yilawa: i-acrylamide (AAM), i-hydroxymethylacrylamide (NMA), i-diacetone acrylamide (DAAM) ne-ethyl acetoacetate methacrylate (AAEM), i-glycidyl methacrylate (GMA), i-dimethylaminoethyl methacrylate (DMAEMA), i-vinyl siloxanes, i-vinylsithoethoni ye-such asuch vinylxytrilane (2-methoxyethoxy) silane, vinyl triisopropoxy silane, γ-methyl propionyloxypropyl trimethoxysilane, γ-methyl propionyloxypropyl tri(β-trimethoxyethoxy silane) monomer, njll. Inani le-monomer esebenzayo ngokuvamile lilawulwa ku-1%~6% (mass ratio) , hhayi kakhulu, ngaphandle kwalokho kungase kuthinte ukuzinza kwesitoreji se-resin noma upende I-Vinyl triisopropoxysilane monomer ngenxa yomphumela wokuvimbela indawo ye-isopropyl, i-Si-O bond hydrolysis ihamba kancane, inani linganyuswa libe ngu-10% ku-emulsion polymerization, okuyinto enhle ukuthuthukisa ukumelana namanzi kwe-emulsion, isimo sezulu nezinye izakhiwo, kodwa intengo yayo iphakeme. , ukuhwamuka kwamanzi kungaba sebhulohweni leketanga le-macromolecular phakathi kokwakheka kwefilimu exhumene.
I-Carboxyl monomer equkethe i-acrylic acid ne-methacrylic acid, ukwethulwa kwamaqembu e-carboxyl kungathuthukisa inhlaka embala, ukumanzisa kwesigcwalisi nokunamathela ku-substrate, futhi neqembu le-epoxy linokusebenza kabusha, ukuphulukiswa kwama-amino resins kunomsebenzi okhuthazayo.Okuqukethwe kwe-carboxyl ye-resin kuvame ukusetshenziswa ivelu ye-asidi (AV), okungukuthi, inani lamamiligremu e-KOH adingekayo ukuze kuncishiswe i-resin engu-1g, iyunithi mgKOH/g (inhlaka eqinile), isilawuli esijwayelekile se-AV cishe esingu-10mgKOH/g (okuqinile inhlaka), uhlelo lwe-polyurethane, i-AV kancane kancane, i-amino resin ene-AV ingaba nkulu, ukukhuthaza ukuxhumanisa.
Lapho kuhlanganiswa i-hydroxy acrylic resin, uhlobo nenani le-hydroxyl monomer kunethonya elibalulekile ekusebenzeni kwe-resin.Ingxenye ye-hydroxy acrylic acid yesistimu ye-polyurethane enezingxenye ezimbili ivame ukusetshenziswa njenge-hydroxyl monomer eyinhloko: i-hydroxyethyl acrylate (HEA) noma i-hydroxyethyl methacrylate (HEMA);ingxenye ye-hydroxy acrylic acid kapende wokubhaka we-amino ivame ukusetshenziswa njenge-hydroxyl monomer yesibili: i-acrylic acid-β-hydroxypropyl ester (HPA) noma i-methacrylic acid-β-hydroxypropyl ester (HPMA).Umsebenzi we-monomer uphakeme, futhi i-hydroxypropyl resin ehlanganiswe yiyo isetshenziswa njengengxenye ye-hydroxyl ye-amino baking lacquer, ethinta ukugcinwa kwe-lacquer,
khetha i-monomer yesibili ye-hydroxypropyl.Eminyakeni yakamuva, kukhona ama-hydroxyl monomers amasha, njenge-acrylic acid noma i-hydroxybutyl methacrylate, i-hydroxyethyl methacrylate kanye nesengezo se-ε-caprolactone (1:1 noma 1:2 mol ratio, Inkampani ye-Dow Chem).Ama-resin ahlanganiswe ngokungezwa kwe-hydroxyethyl methacrylate ne-ε-caprolactone ane-viscosity ephansi, futhi ukulingana okuhle kobulukhuni nokuguquguquka kungafinyelelwa.Ngaphezu kwalokho, ukwethulwa kwamaqembu e-hydroxyl ekugcineni kweketango le-macromolecular ngama-agent okudlulisa amaketanga ohlobo lwe-hydroxyl (njenge-mercaptoethanol, i-mercaptopropanol, ne-2-hydroxyethyl mercaptopropionate) kuthuthukisa ukusatshalaliswa kwamaqembu e-hydroxyl, kwandisa ubulukhuni, futhi kunciphise i-molecule. ukusatshalaliswa kwesisindo, ukunciphisa i-viscosity yesistimu.
Ukwenza ngcono ukumelana ne-ethanol ukwethula i-styrene, i-acrylate ne-methacrylic acid ethuthukisiwe ye-alkyl esters ukuze kuncishiswe okuqukethwe kweqembu le-ester.Kokubili kungabhekwa njengokulinganisa isimo sezulu kanye nokumelana ne-ethanol.I-Methacrylic acid ethuthukisiwe i-alkyl esters i-lauryl methacrylate, i-octadecyl methacrylate, njll., lawa ma-monomer ikakhulukazi athembele ekuthengisweni kwamanye amazwe.
Ama-C resins okugqoka ngokuvamile ama-copolymers, futhi umsebenzi wabo we-copolymerization kufanele ucatshangelwe lapho ukhetha ama-monomers.Ngenxa yesakhiwo esihlukile se-monomer, umsebenzi we-copolymerization uhlukile, ukwakheka kwe-copolymer nokubunjwa kwengxube ye-monomer kuvame ukuhluka, kuma-binary, terpolymerization, angahlotshaniswa nge-equation yokwakheka kwe-copolymer.Kuma-copolymer ahlukahlukene kakhulu, akukho zibalo ezinhle zokuhlobana ezitholakalayo, kuphela ngezifundo zokuhlola, ukuhlaziya okuqondile kwezinkinga ezithile.Empeleni, indlela yokondla ingxube ye-monomer "indlala" (okungukuthi isilinganiso sokudla kwe-monomer
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Uma lingekho inani lesilinganiso se-polymerization, inani le-Q kanye ne-e le-monomer lingasetshenziswa ukubala izinga le-polymerization, noma usebenzise ngokuqondile u-Q no-e ukuze kuvele kuhlolwe umsebenzi we-copolymerization, inani elijwayelekile le-copolymerization monomer Q alikwazi ukwehluka kakhulu, ngaphandle kwalokho kunzima ukwenza i-copolymerize;uma inani le-e lihlukile, kulula ukushintshanisa i-copolymerization, okunye kunzima ukwenza i-monomer ngokungeza inani elimaphakathi le-Q le-monomer, kungathuthukisa ukusebenza kwe-copolymerization.
Ukukhetha i-monomer kufanele futhi kunake usayizi we-monomer toxicity, ubuthi obujwayelekile be-acrylate bukhulu kunobuthi be-methacrylate ehambisanayo, njengobuthi be-methyl acrylate bukhulu kunobuthi be-methyl methacrylate, ngaphezu kobuthi be-ethyl acrylate. mkhulu futhi.
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Isikhathi sokuthumela: Aug-22-2021