TY - JOUR
T1 - Preparation and characterization of chalcone functional urethane acrylates for coating applications
AU - Güler, B.
AU - Önen, H. A.
AU - Karahasanoğlu, M.
AU - Serhatlı, E.
AU - Çakır Çanak, T.
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - New chalcone modified urethane acrylates (CMUA) were synthesized by the reaction of photoactive 4,4′dihydroxychalcone and polyethylene glycol 1000 (PEG-1000) with isophorone diisocyanate (IPDI) and followed by end-capping with 2-hydroxyethyl methacrylate (HEMA). The structure of CMUA oligomers was characterized by FT-IR and 1H NMR spectroscopies. Photosensitivity of CMUA oligomers was confirmed by using UV–vis absorption spectroscopy. The UV-curable clear coatings were prepared by the incorporation of CMUA oligomers into formulations together with reactive diluents such as dipropylene glycol diacrylate (DPGDA), 1,6-hexanediol diacrylate (HDDA) and photoinitiator and applied on Plexiglas plates and Teflon moulds. The physicochemical, mechanical and thermal properties of UV-cured coatings such as gel content, gloss, chemical-solvent resistance, contact angle, gloss, pendulum hardness, pencil hardness, tensile properties and char yield were investigated. The effect of chalcone modification on UV-cured CMUA coatings was evaluated and determined as the improvement in the properties of UV-cured coatings mainly due to the photocrosslinking ability of 4,4′dihydroxychalcone.
AB - New chalcone modified urethane acrylates (CMUA) were synthesized by the reaction of photoactive 4,4′dihydroxychalcone and polyethylene glycol 1000 (PEG-1000) with isophorone diisocyanate (IPDI) and followed by end-capping with 2-hydroxyethyl methacrylate (HEMA). The structure of CMUA oligomers was characterized by FT-IR and 1H NMR spectroscopies. Photosensitivity of CMUA oligomers was confirmed by using UV–vis absorption spectroscopy. The UV-curable clear coatings were prepared by the incorporation of CMUA oligomers into formulations together with reactive diluents such as dipropylene glycol diacrylate (DPGDA), 1,6-hexanediol diacrylate (HDDA) and photoinitiator and applied on Plexiglas plates and Teflon moulds. The physicochemical, mechanical and thermal properties of UV-cured coatings such as gel content, gloss, chemical-solvent resistance, contact angle, gloss, pendulum hardness, pencil hardness, tensile properties and char yield were investigated. The effect of chalcone modification on UV-cured CMUA coatings was evaluated and determined as the improvement in the properties of UV-cured coatings mainly due to the photocrosslinking ability of 4,4′dihydroxychalcone.
KW - 4,4′-dihydroxychalcone
KW - Photoactive
KW - Photocrosslinking
KW - UV-curing
KW - Urethane acrylate
UR - http://www.scopus.com/inward/record.url?scp=85018421364&partnerID=8YFLogxK
U2 - 10.1016/j.porgcoat.2017.04.037
DO - 10.1016/j.porgcoat.2017.04.037
M3 - Article
AN - SCOPUS:85018421364
SN - 0300-9440
VL - 109
SP - 152
EP - 159
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
ER -