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Nchịkọta nke ụkpụrụ nke nhọrọ monomer na njikọ nke resin acrylic

Maka ịdị mfe nke ngwa, a na-ekewa monomers polymeric n'ime isi atọ: monomers siri ike, monomers dị nro na monomers na-arụ ọrụ.Methyl methacrylate (MMA), styrene (ST), na anya acrylic (AN) bụ ndị monomers siri ike na-ejikarị eme ihe, ebe ethyl acrylate (EA), butyl acrylate (BA), na isooctyl acrylate (2-EHA) bụ ndị a na-ejikarị eme ihe. eji monomers nro.

Acrylic acid nwere ogologo agbụ na esters methacrylic (dị ka lauryl na octadecyl esters) nwere mmanya na-aba n'anya ka mma na mgbochi mmiri.

Ndị monomers na-arụ ọrụ bụ acrylates na methacrylates nwere otu hydroxyl, na monomers nwere otu carboxyl bụ acrylic acid na methacrylic acid.Mwebata nke otu hydroxyl nwere ike inye otu ọrụ maka resins nke na-eme ka ihe mgbaze na polyurethane na-agwọ ọrịa na amino resins maka njikọ njikọ.Ndị ọzọ na-arụ ọrụ monomers bụ: acrylamide (AAM), hydroxymethylacrylamide (NMA), diacetone acrylamide (DAAM) na ethyl acetoacetate methacrylate (AAEM), glycidyl methacrylate (GMA), dimethylaminoethyl methacrylate (DMAEMA), vinyl siloxananeth astrivinsilyloxystrivinsil , trivinsilyloxystrivinsil, trivinsilyloxystrivinsil. (2-methoxyethoxy) silane, vinyl triisopropoxy silane, γ-methyl propionyloxypropyl trimethoxysilane, γ-methyl propionyloxypropyl tri (β-trimethoxyethoxy silane) monomer, wdg Ọnụ ego monomer na-arụ ọrụ na-achịkwa na 1% ~ 6% (oke) , ọ bụghị nke ukwuu, ma ọ bụghị ya, ọ nwere ike imetụta nkwụsi ike nke resin ma ọ bụ agba Vinyl triisopropoxysilane monomer n'ihi isopropyl site na-egbochi mmetụta, Si-O bond hydrolysis jiri nwayọọ nwayọọ, ego nwere ike ịbawanye ruo 10% na emulsion polymerization, nke na-eme ka ọ dịkwuo mma. iji meziwanye nguzogide mmiri nke emulsions, ihu igwe na ihe ndị ọzọ, mana ọnụahịa ya dị elu. , mmiri evaporation nwere ike ịbụ na macromolecular yinye akwa n'etiti guzobe cross-njikọ film.

Carboxyl monomer nwere acrylic acid na methacrylic acid, iwebata nke otu carboxyl nwere ike melite resin na agba, wettability filler na adhesion na mkpụrụ, yana na otu epoxy nwere mmeghachi omume, ọgwụgwọ nke resin amino nwere ọrụ catalytic.A na-ejikarị uru acid acid (AV) mee ihe n'ime carboxyl nke resin, ya bụ, ọnụ ọgụgụ nke milligrams nke KOH chọrọ iji wepụ 1g resin, unit mgKOH / g (resin siri ike), njikwa AV n'ozuzu na banyere 10mgKOH / g (siri ike). resin), polyurethane usoro, AV ntakịrị ala, amino resin na AV nwere ike ibu ibu, iji kwalite cross-njikọ.

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Mgbe ị na-emepụta resin hydroxy acrylic, ụdị na ọnụọgụ hydroxyl monomer nwere mmetụta dị mkpa na arụmọrụ resin.A na-ejikarị akụkụ hydroxy acrylic acid nke akụkụ abụọ nke polyurethane dị ka ihe bụ isi hydroxyl monomer: hydroxyethyl acrylate (HEA) ma ọ bụ hydroxyethyl methacrylate (HEMA);A na-ejikarị hydroxy acrylic acid akụrụngwa nke amino baking paint dị ka nke abụọ hydroxyl monomer: acrylic acid-β-hydroxypropyl ester (HPA) ma ọ bụ methacrylic acid-β-hydroxypropyl ester (HPMA).Ọrụ nke monomer dị elu, a na-ejikwa resin hydroxypropyl mebere ya dị ka akụkụ hydroxyl nke amino baking lacquer, nke na-emetụta nchekwa nke lacquer, nwere ike.
họrọ nke abụọ hydroxypropyl monomer.N'afọ ndị na-adịbeghị anya, e nwere ụfọdụ hydroxyl monomers ọhụrụ, dị ka acrylic acid ma ọ bụ hydroxybutyl methacrylate, hydroxyethyl methacrylate na ε-caprolactone mgbakwunye (1: 1 ma ọ bụ 1: 2 mol ratio, Dow Chem Company).The resins synthesized site na mgbakwunye na nke hydroxyethyl methacrylate na ε-caprolactone nwere ala viscosity, na ezi nguzozi nke ike na mgbanwe nwere ike nweta.Tụkwasị na nke ahụ, iwebata ìgwè hydroxyl na njedebe nke agbụ macromolecular site na ndị na-ebufe ụdị nke hydroxyl (dị ka mercaptoethanol, mercaptopropanol, na 2-hydroxyethyl mercaptopropionate) na-eme ka nkesa nke hydroxyl dị iche iche dịkwuo mma, na-eme ka ike sie ike, na-eme ka ọkpụkpụ ahụ dị ike. nkesa arọ, na-ebelata viscosity nke usoro ahụ.

Iji meziwanye nguzogide ethanol iwebata styrene, acrylate na methacrylic acid Advanced alkyl esters iji belata ọdịnaya nke otu ester.Enwere ike ịtụle ha abụọ iji dozie ihu igwe na nguzogide ethanol.Methacrylic acid Advanced alkyl esters bụ lauryl methacrylate, octadecyl methacrylate, wdg, ndị monomers na-adabere na mbubata.

C resins maka mkpuchi na-abụkarị copolymers, na ọrụ copolymerization ha ga-atụle mgbe ị na-ahọrọ monomers.N'ihi usoro monomer dị iche iche, ọrụ copolymerization dị iche iche, ihe mejupụtara copolymer na ngwakọta ngwakọta monomer na-adịkarị iche, maka ọnụọgụ abụọ, terpolymerization, enwere ike jikọta ha site na nha nha nke copolymer.Maka ndị ọzọ copolymer dị iche iche, ọ nweghị ezigbo njikọ njikọ dị, naanị site na nyocha nnwale, nyocha kpọmkwem nke nsogbu ndị akọwapụtara.Na omume, a na-ejikarị usoro nri "agụụ" ngwakọta monomer (ie monomer feeding rate

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Ọ bụrụ na ọ dịghị uru nke ọnụego polymerization, Q na e uru nke monomer nwere ike iji gbakọọ ọnụego polymerization, ma ọ bụ jiri Q na e ozugbo nyochaa ọrụ copolymerization, mkpokọta copolymerization monomer Q uru nwere ike ghara ịdị iche iche. ma ọ bụghị ya, ọ na-esiri ike copolymerize;mgbe e uru dị iche, ọ dị mfe ọzọ copolymerization, ụfọdụ siri ike copolymerize monomer site n'ịgbakwụnye intermediate Q uru nke monomer, nwere ike melite copolymerization arụmọrụ.

Nhọrọ nke monomer kwesịkwara ịṅa ntị na nha nke monomer toxicity, acrylate acrylate n'ozuzu dị ukwuu karịa nsi nke methacrylate kwekọrọ, dị ka methyl acrylate toxicity dị ukwuu karịa nsi nke methyl methacrylate, na mgbakwunye na toxicity nke ethyl acrylate. ka ukwuu.

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Oge nzipu: Ọgọst-22-2021