Effects of thiol additives on urethane acrylate UV primers for SMC applications

Trey, Stacy; Lundström, M.; Ståhlberg, Daniel; Johansson, Mats

doi:10.1016/j.porgcoat.2008.08.031

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…For Samples 2–4, the toughness of the polymer system increased and ductile fracture with rough sections might occur with the introduction of thiol monomer. [ 51 ] For the SEM images of the polymer films in high magnification mode, the microscopic morphology of Sample 1 exhibited a porous polymer framework with voids at the nanometer scale. With the addition of C4S in Sample 2, the polymer fibrils and enlarged porous nanostructure were observed when compared with Sample 1.…”

Section: Resultsmentioning

confidence: 99%

Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol‐Acrylate‐Based Polymer‐Stabilized Blue Phase Liquid Crystals

Wang

et al. 2023

Advanced Optical Materials

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mechanical force, and chemical or electrochemical reactions, have attracted much attention in the fields of optoelectronic devices, sensors, anticounterfeiting, displays, and labeling technology. [1][2][3] Among various organic and inorganic materials, chiral liquid crystal-based soft materials have become promising candidates for creating novel photonic crystals with improved stimuli-responsive performance due to their distinctive features of selfassembly, softness, and multiple responsiveness under various stimulus. [4][5][6] Chiral liquid crystalline materials possess self-organized periodic superstructures and selective reflection of circularly polarized light determined by the chiral dopants, thus exhibiting photonic bandgaps (PBGs) with circular dichroism. [7] For 1D PCs, the cholesteric liquid crystals exhibit 1D photonic superstructures and have achieved remarkable research results in dynamic actuation by light, [8][9][10][11][12][13] temperature, [14,15] pH, [16] stretching, [17] or electric. [18,19] Blue phase liquid crystals (BPLCs) with 3D PBG that can control or manipulate the flow of visible light have recently drawn vast and increasing attention. [20] Because of the spontaneous organization inherent of their 3D periodic structures, the fabrication procedures of BPLCs may be easily implemented to achieve high-quality 3D PCs. [21] Thus, it is attractive to the development of 3D photonic nanostructures Endowing advanced 3D photonic nanoarchitectures with dynamic controllability is currently in the spotlight of soft-matter photonics research. Herein, a well-defined photopatterned polymer-stabilized blue phase (PSBP) film with 3D electrically tunable photonic bandgap is fabricated by a liquid crystalline thiol-acrylate monomers system. Remarkably, the addition of thiol monomers can effectively improve the electrical tuning performance of the PSBP film and maintain excellent thermal stability simultaneously. The proportions of acrylate and thiol monomers are proved to be a key factor on the morphology structure of the polymer network in the PSBP system. By masked UV photopolymerization, a patterned sample with a high-quality image and reversible nonsynergistic electrochromism is obtained. With increasing electric field, the patterned region changes from initial green reflection color to a red one, while no obvious visual color change occurs for the shading region with initial blue reflection color. The distinct electrically responsive behaviors are mainly caused by the microstructural difference of polymer networks, which is engendered by the migration of polymerizable monomers during polymerization. The research disclosed herein may provide new insights into the development of patterned 3D self-assembled liquid crystalline photonic crystal toward anticounterfeiting, displays, colorimetric sensors, labeling technology, and programming photonics.

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Section: Resultsmentioning

confidence: 99%

Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol‐Acrylate‐Based Polymer‐Stabilized Blue Phase Liquid Crystals

Wang

et al. 2023

Advanced Optical Materials

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“…Triazine dithiols have demonstrated efficiency [33,34] in improving the adhesive properties of plated layers, especially those plated onto plastics. Our novel pretreatment process represents the first time that these triazine dithiols are used in combination with scCO2 to impregnate Kevlar® fibers.…”

Section: Introductionmentioning

confidence: 99%

Application of Dithiol Compounds in Supercritical Carbon Dioxide to Improve the Adhesive Properties of Copper-Plated p-Aramid Fibers

et al. 2010

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Supercritical carbon dioxide (scCO2) has been used to impregnate the organometallic complexes in a synthetic polymer prior to electroless copper plating. However, this method has not been applied to highly crystalline and highly oriented polymers, such as p-aramid fibers. In this study, triazine dithiols were used to create a network that consisted of Kevlar® fibers, the organometallic complex palladium (II) hexafluoroacetylacetonate [Pd(hfa)2], and a metal layer. This network improved the adhesion of a copper layer that was added by electroless plating. Three triazine thiols were used, two of which were soluble in scCO2 and one of which was soluble in water. Pretreatment of the Kevlar® fibers comprised two steps : 1) impregnation with a thiol compound, using sc-CO2 or the thiol-water solution ; and 2) impregnation with an organometallic metal complex using sc-CO2. Electroless plating was performed to coat the treated Kevlar® fibers with a layer of copper. By changing the experimental conditions (i.e., pressure, temperature, thiol concentration, and order of impregnation), we found that the triazine thiol improved the electrical resistivity and adhesion of the copper layer.

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Ultrasonic testing and surface conditioning techniques for enhanced thermoplastic adhesive bonds

Gorgun

2024

J Mech Sci Technol

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Effects of thiol additives on urethane acrylate UV primers for SMC applications

Cited by 6 publications

References 10 publications

Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol‐Acrylate‐Based Polymer‐Stabilized Blue Phase Liquid Crystals

Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol‐Acrylate‐Based Polymer‐Stabilized Blue Phase Liquid Crystals

Application of Dithiol Compounds in Supercritical Carbon Dioxide to Improve the Adhesive Properties of Copper-Plated p-Aramid Fibers

Ultrasonic testing and surface conditioning techniques for enhanced thermoplastic adhesive bonds

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