Effect of acrylic acid on the physical properties of UV-cured poly(urethane acrylate-co-acrylic acid) films for metal coating

Preparation and properties of poly(urethane acrylate) (PUA) and tetrapod ZnO whisker (TZnO‐W) composite films

“…All of the PUA/TZnO‐W composite films exhibit characteristic absorption peaks at 2947 and 1720 cm −1 , which are caused by NH and CO stretching in the urethane linkages. Furthermore, the absorption bands near 1636 and 2276 cm −1 corresponding to the CC double bonds of the methacrylate groups and the NCO of the diisocyanate groups, respectively, are absent in all of the composite film spectra, indicating that all monomers with unsaturated double bonds (CC) are completely polymerized with urethane acrylate oligomers under our UV‐curing system , . We also find that the intensity of the absorption bands at 406 cm −1 gradually increases with increasing TZnO‐W powder content.…”

“…The synthesis process for PUA oligomers has been described in our previous work , . PCLT and IPDI (1:2.5 molar ratio) were combined to form urethane acrylate oligomers in a 500 mL four‐necked flask, in an oil bath, equipped with a mechanical stirrer, a thermometer, a dropping funnel and a reflux condenser with a drying tube.…”

“…In recent years, UV‐curing technologies have attracted increasing interest due to their environmental safety, instant curing rate and reduced energy consumption compared to thermally cured coating technologies , . Moreover, UV‐cured coatings represent a class of coatings with few or no volatile organic compounds , , . Among the oligomers used for UV‐curable coatings, poly(urethane acrylate) (PUA) oligomers have garnered attention due to their high solubility, low melting viscosity and three‐dimensional architectures.…”

Properties of UV-Curable Hyperbranched Urethane-Acrylate Modified Acrylic Monomer Coatings

“…% of UA oligomer as compared to that of pure TMPETA coating. In general, the TMPETA/UA layer properties may be attributed to the differences in crosslinking density of composition due to oligomeric compound addition of high molecular mass [13]. Though, further increase in scratch resistance of TMPETA/UA composition coating is observed with the increasing UA content (up to 70 wt.…”

UV-curable electromagnetic shielding composite films produced through waterborne polyurethane-acrylate bonded graphene oxide: preparation and effect of different diluents on the properties

“…However, the gel content values did not reach above 93% for the UV-EMSF-1 series, indicating that at least 7% of the uncross-linked materials were left at the coating system, which can be explained by the fact that single functional groups such as St, which contains only one reactive group in each molecule, cannot produce junction during the radiation curing process (15) and, finally, only generate linear rather than high crosslinking polymers. The molecular flexibility of the double functional groups (TPGDA) and of the three functional groups (TMPTA) is good, increasing the probability of collisions with active free radicals and thereafter making the oligomers cross-link, which can effectively improve the gel content of the system (19). For the three systems, the gel contents of the cured films showed a similar trend that firstly decreased and then increased with the addition of GO and the maximum is the gel content of the pure film without GO, probably because the large space volume of Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 5/17/15 2:01 AM GO and the hydrogen bonding between GO and diluents hinder the cross-linking of oligomers.…”