Kukonzekera kwa epoxy acrylate yotsika komanso yosinthasintha kwambiri komanso momwe imagwiritsidwira ntchito mu zokutira zochiritsira za UV

Ofufuza adapeza kuti kusintha kwa epoxy acrylate (EA) ndi carboxyl-terminated intermediate kumawonjezera kusinthasintha kwa filimuyo ndikuchepetsa kukhuthala kwa utomoni. Kafukufukuyu akutsimikiziranso kuti zinthu zopangira zomwe zimagwiritsidwa ntchito ndizotsika mtengo komanso zimapezeka mosavuta.

Epoxy acrylate (EA) pakadali pano ndiyo oligomer yogwiritsidwa ntchito kwambiri yochizira UV chifukwa cha nthawi yake yochepa yochizira, kuuma kwake kwambiri, mphamvu yabwino kwambiri yamakina, komanso kukhazikika kwa kutentha. Pofuna kuthana ndi mavuto a kufooka kwakukulu, kusinthasintha kosakwanira, komanso kukhuthala kwakukulu kwa EA, oligomer ya epoxy acrylate yochizira UV yokhala ndi kukhuthala kochepa komanso kusinthasintha kwakukulu idakonzedwa ndikugwiritsidwa ntchito pazophimba zochizira UV. Carboxyl terminated intermediate yomwe idapezeka chifukwa cha anhydride ndi diol idagwiritsidwa ntchito kusintha EA kuti iwonjezere kusinthasintha kwa filimu yochizira, ndipo kusinthasinthaku kudasinthidwa kudzera muutali wa unyolo wa kaboni wa diols.

Chifukwa cha makhalidwe awo abwino, ma epoxy resins amagwiritsidwa ntchito kwambiri mumakampani opanga utoto kuposa gulu lina lililonse la ma binder. M'buku lawo latsopano lothandizira "Epoxy Resins", olemba Dornbusch, Christ ndi Rasing akufotokoza zoyambira za kapangidwe ka epoxy group ndipo amagwiritsa ntchito njira zinazake pofotokoza kagwiritsidwe ntchito ka epoxy ndi phenoxy resins muzovala zamafakitale - kuphatikizapo kuteteza dzimbiri, zophimba pansi, zophimba ufa ndi zophimba mkati mwa chitini.

Kukhuthala kwa utomoni kunachepetsedwa mwa kusintha pang'ono E51 ndi binary glycidyl ether. Poyerekeza ndi EA yosasinthidwa, kukhuthala kwa utomoni komwe kwakonzedwa mu kafukufukuyu kunachepa kuchoka pa 29800 kufika pa 13920 mPa s (25°C), ndipo kusinthasintha kwa filimu yokonzedwayo kumawonjezeka kuchoka pa 12 kufika pa 1 mm. Poyerekeza ndi EA yosinthidwa yomwe ikupezeka m'masitolo, zinthu zopangira zomwe zagwiritsidwa ntchito mu kafukufukuyu ndizotsika mtengo ndipo ndizosavuta kupeza ndi kutentha kwa reaction pansi pa 130°C, pogwiritsa ntchito njira yosavuta yopangira, komanso popanda zosungunulira zachilengedwe.

Nkhaniyi yasindikizidwa mu Journal of Coatings Technology and Research, Voliyumu 21, mu Novembala 2023.