Siloxane-modified waterborne UV-curable polyurethane acrylate coatings: Chemorheology and viscoelastic analyses

Bakhshandeh, Ehsan; Sobhani, Sarah; Croutxé‐Barghorn, Céline; Allonas, Xavier; Bastani, Saeed

doi:10.1016/j.porgcoat.2021.106323

Cited by 13 publications

(12 citation statements)

References 37 publications

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“…Stress began to develop with the growth of polymer networks spanning across the coating to show elasticity. 47,48 The photocuring coating shrank freely in the thickness direction but was constrained in the plane of the coating, leading to the development of in-plane stresses. 49,50 The stress no longer relaxed but rather contributed to non-Fickian solvent mass transport when the characteristic relaxation time of the polymer was sufficiently long compared to that of solvent diffusion [51, and references therein].…”

Section: Resultsmentioning

confidence: 99%

Reaction-driven solvent transport in UV-curable phase-separating coatings

Yamamura

2022

J Coat Technol Res

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We experimentally examined the time-evolutions of local compositions in photocurable, monomer-solvent-initiator ternary liquid film coatings using attenuated total-reflectance-Fourier transform infrared spectroscopy. The coatings exhibited phase separation upon UV exposure owing to the inherent partial miscibility between the solvent and the polymer. The solvent concentration at the bottom of the coating increased when exposed to UV light for 1 s from the top, showing a solvent transport along the irradiation direction. The differences in solvent concentration before and after UV exposure showed good agreement with model predictions based on stress-induced non-Fickian solvent mass transport. The solvent concentrations at the bottom remained constant in the case of discrete phase structures, whereas it exponentially decayed over time in bicontinuous phase structures. These results suggest that light-tunable microstructures enable the relaxation of the reaction-driven nonuniformity in solvent concentration distributions.

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Section: Resultsmentioning

confidence: 99%

Reaction-driven solvent transport in UV-curable phase-separating coatings

Yamamura

2022

J Coat Technol Res

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“…But with induction of acrylate functionality, specific segmented structures with desired properties can be obtained for domestic and industrial purposes (Scheme 3). 65 …”

Section: Classification Of Pumentioning

confidence: 99%

“…Bakhshandeh et al, 65 studied the correlation between viscoelastic behavior and molecular weight of polydimethylsiloxane (PDMS) through formulation of siloxane‐modified WPUA coating. PDMS, PTMG, IPDI, DBTDL, DMPA, acetone, HEMA, HQ, TEA and DI water were yielded to obtain Si‐based waterborne polyurethane acrylate (Si‐WPUA) dispersion with 35%–40% solid content.…”

Section: Classification Of Pumentioning

confidence: 99%

Bio‐based photo‐curable polyurethane composites

Ali

Irshad

Atif

2022

Polymers for Advanced Techs

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Polyurethane (PU) covers a range of applications in wearable circuits, coating materials, foaming industries, surgical equipments, packing materials and replacement of plastic materials. As per broad applications spectrum, huge data on PU synthesis has been reported so far, with different types of polyols, isocyanates, organic acids, acrylates with different chain extenders, catalysts, emulsifiers and/or PI. In this review, for a comprehensive study of structure‐activity relationship, data from last 5 years has been compiled for photo‐curable PU categorized on the basis of solvent as well as acrylate components. In this review a range of parameters including tensile strength, hardness, flexibility, hydrophobicity/hydrophilicity, solvent resistance, storage/young's modulus, shape recovery, viscosity, curing kinetics and thermal stability has been compared against composition.

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“…The most common modification methods to improve the properties of WPU include the introduction of acrylate monomers, silicones, organofluorine and nanomaterials [ 3 , 4 , 5 , 6 ]. Among them, the approach by introducing acrylates in WPU obtain the most attention, which could combine the advantages of acrylates and WPU to optimize the performance of coatings.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Hydrophobic Polyurethane Based on Silane Modification

Zhang

et al. 2023

Polymers

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Waterborne coatings have obtained more and more attention from researchers with increasing concerns in environmental protection, and have the advantages of being green, environmentally friendly and safe. However, the introduction of hydrophilic groups leads to lower hydrophobicity and it is difficult to meet the requirements of complex application environments. Herein, we proposed an optimization approach of waterborne polyurethane (WPU) with vinyl tris(β-methoxyethoxy) silane (A172), and it was found that the surface roughness, mechanical properties, thermal stability and water resistance of WPU will be increased to a certain extent with the addition of A172. Moreover, the hydrophobicity of the coating film is best when the silicon content is 10% of the acrylic monomer mass and the water contact angle reaches 100°, which could exceed two-thirds of the research results in the last decade. Therefore, our study can provide some theoretical basis for the research of hydrophobic polyurethane coatings.

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Siloxane-modified waterborne UV-curable polyurethane acrylate coatings: Chemorheology and viscoelastic analyses

Cited by 13 publications

References 37 publications

Reaction-driven solvent transport in UV-curable phase-separating coatings

Reaction-driven solvent transport in UV-curable phase-separating coatings

Bio‐based photo‐curable polyurethane composites

Preparation and Properties of Hydrophobic Polyurethane Based on Silane Modification

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