Acrylate yog dav siv nyob rau hauv kev tsim khoom ntawm ntau yam ntaub ntawv polymer vim nws tsis tshua muaj kub yooj, tshav kub tsis kam, laus kuj, siab transparency thiab xim stability.Cov khoom no ua rau nws siv tau rau ntau yam kev siv, nrog rau cov yas, pem teb varnishes, coatings, textiles, xim thiab adhesives.Hom thiab tus nqi ntawm acrylate monomers siv muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm cov khoom kawg, suav nrog iav hloov kub, viscosity, hardness thiab durability.Ntau cov polymers haum rau kev siv sib txawv tuaj yeem tau txais los ntawm copolymerization nrog cov monomers nrog hydroxyl, methyl lossis carboxyl functional pawg.
Cov ntaub ntawv tau los ntawm polymerization ntawm acrylate monomers yog dav siv nyob rau hauv kev lag luam, tab sis residual monomers feem ntau pom nyob rau hauv cov ntaub ntawv polymeric.Cov monomers residual no yuav tsis tsuas yog ua rau tawv nqaij khaus thiab lwm yam teeb meem, tab sis kuj ua rau tsis kaj siab tsw nyob rau hauv cov khoom kawg vim tsis kaj siab tsw ntawm cov monomers.
Lub olfactory system ntawm tib neeg lub cev tuaj yeem hnov acrylate monomer nyob rau hauv qis heev.Rau ntau cov ntaub ntawv acrylate polymer, cov ntxhiab ntawm cov khoom feem ntau yog los ntawm acrylate monomers.Cov monomers sib txawv muaj cov ntxhiab tsw txawv, tab sis kev sib raug zoo ntawm monomer qauv thiab tsw yog dab tsi?Patrick Bauer los ntawm Friedrich Alexander Universit ä t erlangen-n ü rnberg (Fau) nyob rau hauv lub teb chaws Yelemees tau kawm cov ntxhiab hom thiab tsw thresholds ntawm ib tug series ntawm coj mus muag thiab synthesized acrylate monomers.
Tag nrho ntawm 20 monomers tau sim hauv txoj kev tshawb no.Cov monomers no suav nrog kev lag luam thiab kev sim ua ke.Qhov kev ntsuam xyuas qhia tau hais tias cov ntxhiab ntawm cov monomers tuaj yeem muab faib ua sulfur, sib zog roj, geranium thiab nceb.
1,2-propanediol diacrylate (No. 16), methyl acrylate (No. 1), ethyl acrylate (No. 2) thiab propyl acrylate (No. 3) feem ntau yog piav raws li leej faj thiab qej tsw.Tsis tas li ntawd, ob yam tshuaj tom kawg kuj tau piav qhia tias muaj roj tsw qab, thaum ethyl acrylate thiab 1,2-propylene glycol diacrylate muaj lub tswv yim ntawm cov kua nplaum me ntsis.Vinyl acrylate (No. 5) thiab propenyl acrylate (No. 6) yog piav raws li cov pa roj tsw qab, thaum 1-hydroxyisopropyl acrylate (No. 10) thiab 2-hydroxypropyl acrylate (No. 12) yog piav raws li geranium thiab lighter gas odors. .N-butyl acrylate (No. 4), 3- (z) pentene acrylate (No. 7), SEC butyl acrylate (geranium, nceb tsw; No. 8), 2-hydroxyethyl acrylate (No. 11), 4-methylamyl acrylate (nceb, txiv hmab txiv ntoo tsw; No. 14) thiab ethylene glycol diacrylate (No. 15) yog piav raws li nceb tsw.Isobutyl acrylate (No. 9), 2-ethylhexyl acrylate (No. 13), cyclopentanyl acrylate (No. 17) thiab cyclohexane acrylate (No. 18) yog piav raws li zaub ntug hauv paus thiab Geranium odors.2-methoxyphenyl acrylate (No. 19) yog qhov tsis hnov tsw ntawm geranium thiab haus luam yeeb nqaij npua, thaum nws cov isomer 4-methoxyphenyl acrylate (No. 20) tau piav raws li qhov tsw ntawm anise thiab fennel.
Cov ntxhiab tsw ntawm cov tshuaj ntsuam xyuas monomers pom qhov sib txawv loj.Ntawm no, tus ntxhiab tsw pib hais txog qhov concentration ntawm cov khoom uas ua rau qhov tsawg kawg nkaus stimulus rau tib neeg tsw, los yog hu ua olfactory pib.Qhov siab dua tus ntxhiab tsw, qhov tsw qab.Nws tuaj yeem pom los ntawm cov txiaj ntsig kev sim uas qhov ntsuas qhov tsw tau cuam tshuam ntau dua los ntawm cov pab pawg ua haujlwm ntau dua li cov saw ntev.Ntawm 20 monomers kuaj, 2-methoxyphenyl acrylate (No. 19) thiab SEC butyl acrylate (No. 8) muaj cov ntxhiab tsw qis tshaj plaws, uas yog 0.068ng / lair thiab 0.073ng / lair, feem.2-hydroxypropyl acrylate (NO. acrylate (No. 13).
Yog tias muaj cov chaw chiral hauv cov molecule, cov qauv chiral sib txawv kuj muaj kev cuam tshuam rau cov ntxhiab ntawm cov molecule.Txawm li cas los xij, tsis muaj kev sib tw kawm rau lub sijhawm tam sim no.Cov saw hlau sab hauv cov molecule kuj muaj qee qhov cuam tshuam rau cov ntxhiab ntawm cov monomer, tab sis muaj qhov zam.
Methyl acrylate (No. 1), ethyl acrylate (No. 2), propyl acrylate (No. 3) thiab lwm yam luv luv saw monomers qhia tib yam tsw xws li sulfur thiab qej, tab sis cov ntxhiab yuav maj mam txo nrog qhov nce ntawm cov saw ntev.Thaum cov saw ntev nce, cov qej tsw yuav txo qis, thiab qee cov roj tsw qab sib zog yuav raug tsim.Kev taw qhia ntawm cov pab pawg hydroxyl nyob rau hauv cov saw hlau sab muaj feem cuam tshuam rau kev sib cuam tshuam ntawm intermolecular, thiab yuav muaj kev cuam tshuam ntau dua rau cov ntxhiab uas tau txais cov hlwb, ua rau muaj cov ntxhiab tsw txawv.Rau cov monomers nrog vinyl los yog propenyl unsaturated ob daim ntawv cog lus, uas yog vinyl acrylate (No. 5) thiab propenyl acrylate (No. 6), lawv tsuas qhia cov tsis hnov tsw ntawm gaseous roj.Hauv lwm lo lus, kev taw qhia ntawm qhov thib ob capped unsaturated ob daim ntawv cog lus ua rau ploj ntawm leej faj lossis qej tsw.
Thaum cov pa roj carbon ntau ntxiv mus rau 4 lossis 5 carbon atoms, cov ntxhiab tsw pom tseeb yuav hloov pauv ntawm leej faj thiab qej rau nceb thiab Geranium.Ntawm tag nrho, cyclopentanyl acrylate (No. 17) thiab cyclohexane acrylate (No. 18), uas yog aliphatic monomers, qhia cov ntxhiab tsw zoo sib xws (geranium thiab carrot tsw), thiab lawv txawv me ntsis.Kev taw qhia ntawm aliphatic sab chains tsis muaj kev cuam tshuam zoo rau kev nkag siab ntawm tsw.
Post lub sij hawm: Jun-07-2022