Acrylate waxaa si weyn loogu isticmaalaa soo saarista qalabyo kala duwan oo polymer ah sababtoo ah dabacsanaanta heerkulka hooseeya, caabbinta kulaylka, caabbinta gabowga, daahfurnaanta sare iyo xasilloonida midabka.Guryahani waxay awood u siinayaan in loo isticmaalo codsiyo kala duwan, oo ay ku jiraan balaastikada, varnishes sagxada, dahaarka, dunta, rinjiga iyo xabagta.Nooca iyo cadadka acrylate monomers ee la isticmaalay ayaa saameyn weyn ku leh waxqabadka badeecada ugu dambeysa, oo ay ku jiraan heerkulka kala-guurka dhalada, viscosity, adkaanta iyo adkeysiga.polymers badan oo ku haboon codsiyada kala duwan waxaa lagu heli karaa kobolymerization oo leh monomers leh hydroxyl, methyl ama carboxyl functional group.
Qalabka lagu helo polymerization ee monomers acrylate ayaa si weyn loogu isticmaalaa warshadaha, laakiin monomers haraaga ayaa inta badan laga helaa alaabta polymeric.Monomer-yadan haraaga ah ma aha oo kaliya inay keenaan cuncun maqaarka iyo dhibaatooyin kale, laakiin sidoo kale waxay keenaan ur aan fiicnayn badeecada ugu dambeysa sababtoo ah ur aan fiicneyn oo monomers ah.
Nidaamka urta ee jidhka bini'aadamka wuxuu dareemi karaa monomer acrylate oo aad u hooseeya.Qalab badan oo acrylate polymer ah, urta alaabtu waxay inta badan ka timaadaa monomers acrylate.monomers kala duwan waxay leeyihiin ur kala duwan, laakiin waa maxay xidhiidhka ka dhexeeya qaab-dhismeedka monomer iyo ur?Patrick Bauer oo ka socda Friedrich Alexander Universität ä t erlangen-n ü rnberg (Fau) ee Jarmalka ayaa daraasad ku sameeyay noocyada urta iyo meelaha urta ee taxane ah oo la ganacsado oo la farsameeyay.
Wadarta 20 monomers ayaa lagu tijaabiyay daraasaddan.monomer-yadaas waxa ka mid ah ganacsi iyo shaybaadhka la farsameeyey.Tijaabadu waxay muujinaysaa in urta monomers-kan loo qaybin karo baaruud, gaas fudud, geranium iyo likaha.
1,2-propanediol diacrylate (No. 16), methyl acrylate (No. 1), ethyl acrylate (No. 2) iyo propyl acrylate (No. 3) ayaa inta badan lagu tilmaamay inay yihiin ur sulfur iyo toonta.Intaa waxaa dheer, labada shay ee dambe ayaa sidoo kale lagu tilmaamay inay leeyihiin ur gaas fudud, halka ethyl acrylate iyo 1,2-propylene glycol diacrylate ay leeyihiin aragti ah ur yar oo koollo ah.Vinyl acrylate (No. 5) iyo propenyl acrylate (No. 6) ayaa lagu tilmaamay inay yihiin urta shidaalka gaaska, halka 1-hydroxyisopropyl acrylate (No. 10) iyo 2-hydroxypropyl acrylate (No. 12) lagu tilmaamay inay yihiin geranium iyo ur gaas fudud. .N-butyl acrylate (No. 4), 3- (z) pentene acrylate (No. 7), SEC butyl acrylate (geranium, dhadhan likaha; No. 8), 2-hydroxyethyl acrylate (No. 11), 4-methylamyl acrylate (likaha, dhadhanka miraha; No. 14) iyo ethylene glycol diacrylate (No. 15) ayaa lagu tilmaamay inay yihiin dhadhan likaha.Isobutyl acrylate (No. 9), 2-ethylhexyl acrylate (No. 13), cyclopentanyl acrylate (No. 17) iyo cyclohexane acrylate (No. 18) ayaa lagu tilmaamay inay yihiin karooto iyo urta Geranium.2-methoxyphenyl acrylate (No. 19) waa urta geranium iyo ham sigaar cabbin, halka isomer 4-methoxyphenyl acrylate (No. 20) lagu tilmaamay inuu yahay urta anise iyo fennel.
Meelaha urta ee monomer-yada la tijaabiyay waxay muujiyeen farqi weyn.Halkan, marinka urta waxaa loola jeedaa isku-duubnaanta walaxda soo saarta kicinta ugu yar ee aragtida urta bini'aadamka, oo sidoo kale loo yaqaano marinka urta.Markasta oo uu sareeyo marinka urta, ayaa hoos u dhigta urta.Waxaa laga arki karaa natiijooyinka tijaabada ah in marinka urta ay si aad ah u saameeyaan kooxaha shaqeeya marka loo eego dhererka silsiladda.Ka mid ah 20-ka monomers ee la tijaabiyay, 2-methoxyphenyl acrylate (No. 19) iyo SEC butyl acrylate (No. 8) ayaa lahaa heerka ugu hooseeya ee urta, kuwaas oo ahaa 0.068ng/lair iyo 0.073ng/lair, siday u kala horreeyaan.2-hydroxypropyl acrylate (No. 12) iyo 2-hydroxyethyl acrylate (No. 11) ayaa muujiyay heerka ugu sarreeya ee urta, kuwaas oo ahaa 106 ng / lair iyo 178 ng / lair, siday u kala horreeyaan, in ka badan 5 iyo 9 jeer 2-ethylhexyl acrylate (No. 13).
Haddii ay jiraan xarumo chiral ah oo ku jira molecule, qaababka kala duwan ee chiral ayaa sidoo kale saameyn ku leh urta molecule.Si kastaba ha ahaatee, ma jirto daraasad ka soo horjeeda wakhtiga la joogo.Silsiladda dhinaca ee molecule-ku waxa kale oo ay saamayn ku leedahay urta monomer-ka, laakiin waxa jira waxyaabo ka reeban.
Methyl acrylate (No. 1), ethyl acrylate (No. 2), propyl acrylate (No. 3) iyo monomers kale oo gaaban oo gaaban ayaa muujinaya ur isku mid ah sida baaruud iyo toon, laakiin urta ayaa si tartiib tartiib ah hoos u dhigi doonta kororka dhererka silsiladda.Marka dhererka silsiladda uu kordho, urta toonta ayaa yaraan doonta, waxaana la soo saari doonaa xoogaa ur gaas ah.Soo bandhigida kooxaha hydroxyl ee silsiladda dhinaca ayaa saameyn ku leh isdhexgalka intermolecular, waxayna saameyn weyn ku yeelan doontaa urta qaata unugyada, taasoo keenta dareemo ur kala duwan.Kuwa monomers leh ee leh vinyl ama propenyl unsaturated bond bonds, kuwaas oo kala ah vinyl acrylate (No. 5) iyo propenyl acrylate (No. 6), waxay muujinayaan kaliya urta shidaalka gaaska.Si kale haddii loo dhigo, hordhaca xidhidhiyaha labajibbaaran ee unsaturated unsaturated ee labaad waxay keenaysaa in la waayo baaruud ama ur toon ah.
Marka silsiladda kaarboonka la kordhiyo 4 ama 5 atamka kaarboon, urta la dareemayo waxay si cad uga beddeli doontaa baaruud iyo toonta oo u beddelaysa likaha iyo Geranium.Guud ahaan, cyclopentanyl acrylate (No. 17) iyo cyclohexane acrylate (No. 18), kuwaas oo ah monomers aliphatic, waxay muujinayaan ur isku mid ah (geranium iyo ur karootada), waxayna kala duwan yihiin.Soo bandhigida silsiladaha dhinaca aliphatic ma laha saameyn weyn oo ku saabsan dareenka urta.
Waqtiga boostada: Jun-07-2022