Influence of hydrogen bonding interactions on the properties of ultraviolet‐curable coatings

Abstract

Phenolic novolac type epoxy resin has been modified with acrylic acid (AA) and 2-acrylamido-2-methyl-1propanesulfonic acid (AMPS) to form ultraviolet-curable coatings, and integrated performances of the coatings were evaluated. It was found that the hydrogen bonding interactions among the oligomers became stronger along with the increase of AMPS content, thus the oligomer viscosity and a variety of polymer properties were affected. The polar hydrogen bond donors significantly enhanced the adhesion strength and surface wetting behavior of the coatings. Meanwhile, hydrogen bonding interactions can also reinforce the three-dimensional structure of the film as in polymeric state, which potentially increased its glass transition temperature and mechanical properties. Results of chemical resistance showed that coatings modified with moderate amount of AMPS could be completely removed in several minutes when exposed to alkali solution or anhydrous ethanol. With these attractive features, modified films had prospective applications in temporary protective coatings.

Synthesis and characterization of UV-cured epoxy acrylate resin with cyclic methacrylate as diluents

“…The data of the stress-strain test with the cured resins are listed in Table IV. The specimens were broken without yield and this indicated that the materials were hard and brittle (Shen et al, 2016). As can be seen, in the Figure 7, the tensile strength of EA1, EA2 and EA3 were a little higher than EA.…”

“…After immersing in acetone for 48 h, the GCs of these cured materials were calculated and showed in TableI. The value was measured to evaluate the crosslinked molecular structure of the resins (Shen et al, 2016). High GC can be indicated that the polymeric network is tightly crosslinked.…”