Effects of curing conditions on structural evolution and mechanical properties of UV-curable polyurethane acrylate coatings

Dong, Fengzhong; Maganty, Suraj; Meschter, Stephan J.; Cho, Junghyun

doi:10.1016/j.porgcoat.2017.09.018

Cited by 34 publications

(24 citation statements)

References 28 publications

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“…Although classic TTT diagram plays a significant role in describing the gelation, vitrification and extent of conversion in physical state during the curing process, the visual relationship between temperature, time, and curing degree cannot be constructed by the classical TTT diagram directly, especially in the entire curing window. In general, that curing degree reflected the level of curing crosslinking reaction is obtained via the coupling of curing temperature and curing time on resin, which is an important parameter of the curing process and directly determines the merits of the final properties of thermosetting resin . In addition, construction of curing curves is also closely related to curing degree.…”

Section: Introductionmentioning

confidence: 99%

Construction of improved isothermal TTT cure diagram based on an epoxy–amine thermoset

Zhang

Wang

Liu

2018

J of Applied Polymer Sci

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Cure degree plays a pivotal role in determining the final properties of thermosetting resin, while the parameter cannot be visually presented by the classic isothermal time–temperature‐transformation (TTT) diagram. An improved isothermal TTT cure diagram is built for an epoxy–amine thermoset with the visual relationship between temperature, time, and cure degree during the whole curing. As for the improved isothermal TTT cure diagram, the curing surface and the gelation plane were developed using Vyazovkin method and rheological analysis in turn, and the variation between glass transition temperature (T g) and curing degree was described by Dibenedetto's equation. The obtained improved isothermal TTT diagram of epoxy–amine thermoset was constructed by the combination of calorimetric and rheological analysis. The fitting results of vitrification surface and gelation plane obtained via improved isothermal TTT diagram were in good agreement with experimental results. In addition, the experimental gelation curve of epoxy–amine thermoset is directly linked to the steepest location of curing surface. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47279.

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Section: Introductionmentioning

confidence: 99%

Construction of improved isothermal TTT cure diagram based on an epoxy–amine thermoset

Zhang

Wang

Liu

2018

J of Applied Polymer Sci

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“…This can be understood as a phenomenon depending on the density of acrylate. This is because the density of the acrylate influences the formation of the network structure in the three-dimensional space [ 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Evaluation of UV Curing Properties of Mixture Systems with Differently Sized Monomers

et al. 2018

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Ultraviolet (UV) curing is a photopolymerization technique resulting in a three-dimensional polymer network from monomers and oligomers after exposure to UV light, which is often used for fusion industry. However, shrinkage is an issue that needs to be resolved. Studies of single substances have been extensively conducted, but studies of mixture systems have not sufficiently been undertaken. In this study, we evaluate the shrinkage phenomenon by studying a monomer/monomer binary system and monomer/macromer composite systems. Shrinkage tends to increase when compounds varying in size are used. Similar to the shrinkage phenomenon, the curing rate is also relatively higher in such systems. These synergistic effects are evaluated to be due to the nano-porous effect, and vary with the composition ratio and material structure.

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“…After UV and EB curing formed strong chemical bond between AUA and wood substrate so the hardness is increased. The mechanical characteristics such as hardness and adhesion results were summarized in table (6). It was observed that the pencil hardness of the acrylate coatings cured by UV and EB irradiation was 5H and 7H, respectively.…”

Section: Application Of Acrylate Coatings On the Plywood Surfacementioning

confidence: 99%

“…Polyurethane acrylate is a type of UV curable prepolymer with excellent properties such as excellent flexibility, low temperature resistance, good weatherability, and optical property [6]. Polyurethane acrylate coatings combine high toughness with elasticity.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of ultraviolet and electron beam irradiation on acrylate coatings

Mohamed¹,

Mohamed²,

Moustafa

et al. 2019

Egypt. J. Chem.

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R ADIATION curing is the polymerization of a chemical system which is initiated by ultraviolet (UV) or electron beam (EB) irradiation. The curing, the transformation from a liquid into a non-tacky solid, is very fast and occurs in less than one second. In this work, the optimum irradiation time on curing urethane acrylate coating by using UV and the best cured dose by using EB irradiation was studied. Coating formulations were prepared by physical mixing of aliphatic urethane acrylate (AUA) and tripropylene glycol diacrylate (TPGDA) at different ratio (60:40), (70:30), and (80:20) to choose the optimum concentration. Cured coating films were characterized by Fourier transform spectroscopy (FTIR), and swelling properties. The wood surface that cured by UV or EB were tested for their end use performance properties like pencil hardness, adhesion, bending, chemical resistance, steam resistance, stain resistance, and cigarette burn resistance test. superior results and excellent mechanical performance of acrylate films on the surface of wood induced by EB were found compared with those induced by UV irradiation.

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Effects of curing conditions on structural evolution and mechanical properties of UV-curable polyurethane acrylate coatings

Cited by 34 publications

References 28 publications

Construction of improved isothermal TTT cure diagram based on an epoxy–amine thermoset

Construction of improved isothermal TTT cure diagram based on an epoxy–amine thermoset

Evaluation of UV Curing Properties of Mixture Systems with Differently Sized Monomers

A comparative study of ultraviolet and electron beam irradiation on acrylate coatings

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