Ukulungiswa kwe-epoxy acrylate ephansi kanye nokuguquguquka okuphezulu kanye nokusetshenziswa kwayo ekumbozweni okuphulukiswa yi-UV

Abacwaningi bathole ukuthi ukuguqulwa kwe-epoxy acrylate (EA) nge-carboxyl-terminated intermediate kwandisa ukuguquguquka kwefilimu futhi kunciphisa ukujiya kwe-resin. Ucwaningo luphinde lufakazele ukuthi izinto zokusetshenziswa ezisetshenziswayo azibizi futhi zitholakala kalula.

I-Epoxy acrylate (EA) njengamanje iyi-oligomer elaphekayo ye-UV esetshenziswa kakhulu ngenxa yesikhathi sayo esifushane sokuqina, ubulukhuni bokumboza okuphezulu, isici esihle kakhulu somshini, kanye nokuzinza kokushisa. Ukuze kuxazululwe izinkinga zokuphuka okuphezulu, ukuguquguquka okungekuhle, kanye nokuthamba okuphezulu kwe-EA, i-oligomer ye-epoxy acrylate elaphekayo ye-UV ene-viscosity ephansi kanye nokuguquguquka okuphezulu yalungiswa futhi yasetshenziswa ezimbozweni ezilaphekayo ze-UV. I-carboxyl terminated intermediate etholwe ngokuphendula kwe-anhydride kanye ne-diol yasetshenziswa ukuguqula i-EA ukuthuthukisa ukuguquguquka kwefilimu elaphekayo, futhi ukuguquguquka kwalungiswa ngobude beketanga lekhabhoni lama-diol.

Ngenxa yezakhiwo zawo ezivelele, ama-epoxy resins asetshenziswa kabanzi embonini yokumboza kunanoma yiliphi elinye iqembu le-binder. Encwadini yabo entsha yokubhekisela ethi “Epoxy Resins”, ababhali uDornbusch, uChrist noRasing bachaza izisekelo ze-chemistry yeqembu le-epoxy futhi basebenzisa izindlela ezithile zokuchaza ukusetshenziswa kwama-epoxy kanye nama-phenoxy resins ekumbozeni kwezimboni - kufaka phakathi ukuvikelwa kokugqwala, ukumboza phansi, ukumboza ngempuphu kanye nokumboza kwangaphakathi kwamathini.

I-resin viscosity yehlisiwe ngokufaka i-E51 esikhundleni sayo kancane nge-binary glycidyl ether. Uma kuqhathaniswa ne-EA engashintshiwe, i-resin viscosity elungiselelwe kulolu cwaningo yehla kusuka ku-29800 kuya ku-13920 mPa s (25°C), kanti ukuguquguquka kwefilimu elungisiwe kuyanda kusuka ku-12 kuya ku-1 mm. Uma kuqhathaniswa ne-EA eguquliwe etholakala kwezentengiselwano, izinto zokusetshenziswa ezisetshenziswe kulolu cwaningo zishibhile futhi kulula ukuzithola ngokushisa kokusabela okungaphansi kuka-130°C, kusetshenziswa inqubo elula yokwenza, futhi azikho izinyibilikisi eziphilayo.

Lokhu kuhlaziywa kushicilelwe ku-Journal of Coatings Technology and Research, uMqulu 21, ngoNovemba 2023.