1. Hyperbranched eto
Gẹgẹbi oriṣi polima tuntun, polima hyperbranched ni eto iyipo kan, nọmba nla ti awọn ẹgbẹ ipari ti nṣiṣe lọwọ ati pe ko si yiyi laarin awọn ẹwọn molikula.Awọn polima hyperbranched ni awọn anfani ti itusilẹ irọrun, aaye yo kekere, iki kekere ati ifaseyin giga.Nitorinaa, awọn ẹgbẹ acryloyl ati awọn ẹgbẹ hydrophilic ni a le ṣafihan lati ṣajọpọ ina omi ti n ṣe itọju oligomers, eyiti o ṣii ọna tuntun fun igbaradi ti resini UV Waterborne.
Polyester hyperbranched UV ti o ni arowoto (whpua) ni a pese sile nipasẹ iṣesi ti Hyperbranched Polyester ọlọrọ ni awọn ẹgbẹ hydroxyl pẹlu succinic anhydride ati ipdi-hea prepolymer, ati nikẹhin yomi kuro pẹlu amine Organic lati ṣe iyọ.Awọn abajade fihan pe oṣuwọn imularada ina ti resini jẹ iyara ati awọn ohun-ini ti ara dara.Pẹlu ilosoke ti akoonu apa lile, iwọn otutu iyipada gilasi ti resini pọ si, lile ati agbara fifẹ tun pọ si, ṣugbọn elongation ni isinmi dinku.Awọn polyesters hyperbranched ni a pese sile lati awọn polyanhydrides ati awọn epoxides monofunctional.Glycidyl methacrylate jẹ ifihan lati fesi siwaju sii pẹlu hydroxyl ati awọn ẹgbẹ carboxyl ti awọn polima hyperbranched.Nikẹhin, a ṣafikun triethylamine lati yomi ati ṣe awọn iyọ lati gba awọn polyesters hyperbranched UV curable waterborne.Awọn abajade fihan pe diẹ sii ni akoonu ẹgbẹ-carboxyl ni ipari ti resini hyperbranched ti o da lori omi, ti o dara julọ solubility omi;Oṣuwọn imularada ti resini pọ si pẹlu ilosoke ti awọn iwe ifowopamosi ilọpo meji.
2 eto arabara eleto arabara
Imọlẹ UV ti omi ti o ni arowoto Organic / eto arabara eleto jẹ ẹya ti o munadoko ti resini UV Waterborne ati awọn ohun elo eleto.Awọn anfani ti awọn ohun elo aiṣedeede gẹgẹbi irẹwẹsi wiwọ giga ati resistance oju ojo giga ni a ṣe sinu resini lati mu awọn ohun-ini okeerẹ ti fiimu imularada.Nipa iṣafihan awọn patikulu inorganic gẹgẹbi nano-SiO2 tabi montmorillonite sinu eto imularada UV nipasẹ ọna pipinka taara, ọna sol-gel tabi ọna intercalation, UV curing Organic / inorganic arabara eto le ṣe murasilẹ.Ni afikun, monomer organosilicon le ṣe afihan sinu ẹwọn molikula ti oligomer UV olomi.
Organo / inorganic ipara arabara (Si PUA) ni a pese sile nipasẹ iṣafihan awọn ẹgbẹ polysiloxane sinu apakan rirọ ti polyurethane pẹlu ebute hydroxybutyl polydimethylsiloxane (PDMS) meji ati diluting pẹlu awọn monomers akiriliki.Lẹhin imularada, fiimu kikun ni awọn ohun-ini ti ara ti o dara, igun olubasọrọ giga ati resistance omi.Hyperbranched hybrid polyurethane ati ina si bojuto hyperbranched polyurethane ti a pese sile lati ara-ṣe polyhydroxy hyperbranched polyurethane, succinic anhydride, silane asopo ohun oluranlowo KH560, glycidyl methacrylate (GMA) ati hydroxyethyl methacrylate.Lẹhinna, Si02 / Ti02 Organic-inorganic hybrid sol ti ina imularada hyperbranched polyurethane ti pese sile nipasẹ idapọ ati hydrolyzing pẹlu tetraethyl orthosilicate ati n-butyl titanate ni awọn iwọn oriṣiriṣi.Awọn abajade fihan pe pẹlu ilosoke ti akoonu inorganic, líle pendulum ti bo arabara pọ si ati aibikita dada n pọ si.Didara dada ti ibora arabara SiO2 dara julọ ju ti a bo arabara Ti02.
3 meji curing eto
Lati le yanju awọn ailagbara ti itọju onisẹpo mẹta ti Waterborne UV resini ati imularada ti abọ ti o nipọn ati eto awọ, ati mu awọn ohun-ini ti fiimu naa pọ si, awọn oniwadi ṣe agbekalẹ eto itọju meji kan ti o ṣajọpọ imole ina pẹlu awọn ọna ṣiṣe itọju miiran.Lọwọlọwọ, imularada ina, imularada gbona, imularada ina / atunṣe atunṣe, imularada ina radical ọfẹ / imularada ina cationic ati imularada ina / imularada tutu jẹ awọn ọna ṣiṣe itọju meji ti o wọpọ, ati pe diẹ ninu awọn eto ti lo.Fun apẹẹrẹ, alemora aabo itanna UV jẹ eto imularada meji ti imularada ina / redox tabi imularada ina / imularada tutu.
Awọn monomer ethyl acetoacetate methacrylate (amme) ti o ṣiṣẹ ni a ṣe sinu ipara polyacrylic acid, ati pe a ṣe agbekalẹ ẹgbẹ imularada ina nipasẹ ifarabalẹ afikun Michael ni iwọn otutu kekere lati ṣe iṣelọpọ ooru curing / uv curing waterborne polyacrylate.Gbẹ ni iwọn otutu igbagbogbo ti 60 ° C, 2 x 5 Labẹ ipo 6 kW ti o ni itọsi atupa mercury giga-titẹ, lile ti resini lẹhin dida fiimu jẹ 3h, resistance oti jẹ awọn akoko 158, ati resistance alkali jẹ 24 wakati.
4 iposii acrylate / polyurethane acrylate apapo eto
Epoxy acrylate ti a bo ni awọn anfani ti líle giga, ifaramọ ti o dara, didan giga ati resistance kemikali ti o dara, ṣugbọn o ni irọrun ti ko dara ati brittleness.Polyurethane acrylate ti omi ti omi ni awọn abuda ti o dara resistance resistance ati irọrun, ṣugbọn oju ojo ko dara.Lilo iyipada kemikali, idapọ ti ara tabi awọn ọna arabara lati ṣe idapọ awọn resini meji ni imunadoko le mu iṣẹ ṣiṣe ti resini ẹyọkan jẹ ki o fun ere ni kikun si awọn anfani wọn, ki o le ṣe agbekalẹ eto imularada UV giga-giga pẹlu awọn anfani mejeeji.
5 macromolecular tabi polymerizable photoinitiator
Pupọ julọ awọn olupilẹṣẹ fọto jẹ awọn ohun elo kekere aryl alkyl ketone, eyiti ko le jẹ jijẹ patapata lẹhin imularada ina.Awọn ohun alumọni kekere ti o ku tabi awọn ọja fọtoyisi yoo jade lọ si dada ti a bo, nfa yellowing tabi õrùn, eyiti yoo ni ipa lori iṣẹ ati ohun elo ti fiimu imularada.Nipa iṣafihan awọn photoinitiators, awọn ẹgbẹ acryloyl ati awọn ẹgbẹ hydrophilic sinu awọn polima hyperbranched, awọn oniwadi ṣajọpọ awọn photoinitiators macromolecular polymerizable lati inu omi lati bori awọn aila-nfani ti awọn olupilẹṣẹ molikula kekere.
Akoko ifiweranṣẹ: May-09-2022