Fabrication of an epoxy graft poly(St-acrylate) composite latex and its functional properties as a steel coating

Tang, Erjun; Bian, Feng; Klein, A.; El‐Aasser, M. S.; Li, Shaojie; Miao, Yuan; Zhao, Dan

doi:10.1016/j.porgcoat.2014.06.027

Cited by 23 publications

(10 citation statements)

References 35 publications

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“…Li et al prepared soybean oil‐styrene copolymer through cationic polymerization with divinylbenzene (DVB) as the CA, and the damping factor presented a similar downward trend with T g moved to the high temperature region 25 . But in the acrylic latex modified by epoxy resin reported by Tang et al, the crosslinking reaction between epoxy and amino groups resulted to the large damping factor up to 2.7 26 . Zhang synthesized hyperbranched polyol for CA to crosslink polyurethane‐acrylic copolymer at the ratios of 0, 0.5, 1.0, and 1.5 wt%, and found that when the ratios were 0.5 and 1.0, the damping factors were higher than the other two 27 .…”

Section: Introductionmentioning

confidence: 95%

The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings

Guo

et al. 2020

J of Applied Polymer Sci

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Latex polymers with precisely designed dynamic mechanical behavior are the key for waterborne damping coatings, which are widely desired in noise and vibration reduction with additional environmental benefits. In this work, we synthesized series of polymer latexes with various crosslinking agents (CA) and network distributions through the control on emulsion polymerization processes. We have revealed that the variation on crosslinking can significantly direct the latex behavior under dynamic conditions as well as its films. The variables involve the CA composition, the functionality, the crosslinking manner, the hydrophilic‐hydrophobic feature as well as the feeding method. Although all the latex films showed the damping peaks locating in the range from −10 to 70°C, their damping behaviors were quite different. Suggested by the empirical parameters of LA and TA, the product from sequential monomer feeding method tended to give good extensional damping performance. Especially when the crosslinking of diacetone acrylamide (DAAM)/adipic dihydrazide was applied, there was a linear increase on LA with the increasing dosage of DAAM from 0 to 10 mmol in the final monomer addition batch. Meanwhile, good constrained layer damping is expected on the products from the power monomer feeding method with the maximum CA dosage shown below 7.5 mmol. The best TA was achieved when the CA of divinylbenzene was used in the dosage of 5 mmol. These results would be valuable to be referenced in the engineering on organic damping materials toward modern industrial and vehicles applications.

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Section: Introductionmentioning

confidence: 95%

The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings

Guo

et al. 2020

J of Applied Polymer Sci

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“…The reaction for synthesizing the photosensitive epoxy ink takes place in the resin synthesizer at a constant temperature as shown in Figure a. Figure S1 exhibits the reaction equation between EP and AA in the presence of a catalyst, which is essentially an addition esterification reaction between the epoxy and carboxyl groups. − Compared with the conventional esterification, no water is produced . The ingredient EP is a colorless and transparent liquid and the reaction product EPAc is a yellow transparent liquid.…”

Section: Results and Discussionmentioning

confidence: 99%

Photosensitive Composite Inks for Digital Light Processing Four-Dimensional Printing of Shape Memory Capture Devices

Wang

Zhang

Liu

et al. 2021

ACS Appl. Mater. Interfaces

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High-performance shape memory thermosetting polymers and their composites for four-dimensional (4D) printing are essential in practical applications. To date, most printable thermosets suffer from complicated processes, poor thermodynamic performances, and low printing speed. Here, photosensitive composite inks for fast photocuring printing are developed. The inks consist of epoxy acrylate (EPAc), polyethylene glycol dimethacrylate (PEGDMA), and carbon fillers, which form a firm network structure when exposed to UV light. EPAc is synthesized via addition esterification of epoxy resin and acrylic acid under mild conditions. It is worth noting that raw materials for the reaction are diverse, including not only various epoxy resins but also molecules with epoxy groups. The 4D printing speed of up to 180 mm/h is mainly attributed to the exothermic reaction initiated by free radicals, which accelerates the polymerization of EPAc and PEGDMA. Most importantly, by increasing the exposure time of each layer from 1 s to 3 s during the printing process, the epoxy composite-infilled carbon nanotubes and carbon fibers are printed to ensure the integrity of the microlayer structure. Furthermore, we design a claw-like catcher device based on the above printable composite inks to demonstrate its potential applications in aerospace, such as grasping end-of-service spacecraft or explosive debris. Undoubtedly, 4D printing technology opens up a new portal for the manufacturing of thermoset epoxy composites and complex structures, which make the shape memory thermosetting epoxy resins and their composites possess excellent properties and good engineering application prospects.

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“…By adding a crosslinking agent during film formation, the anticorrosion properties of the composite coatings were remarkably improved. In a surfactant and co-surfactant co-functionalized system, Tang et al [14] prepared a composite latex with a high content of epoxy-styrene-acrylate for metal coating via a mini-emulsion grafting method. However, the two polymers physically combined during preparation.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Anticorrosion Properties through Structured Particle Design of Waterborne Epoxy-Styrene-Acrylate Composite Emulsion

et al. 2021

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In order to develop a waterborne epoxy-styrene–acrylate composite latex with a better stability and anticorrosion resistance, a novel synthetic approach has been proposed. First, modified by methyl acrylic, epoxy resin containing terminal C=C double bonds was successfully synthesized, where epoxide groups were partially retained. Then, by structural design and multi-stage seed emulsion copolymerization, a stable waterborne epoxy-styrene-acrylate composite latex composed of a modified epoxy resin acrylate polymer as the core, inert polystyrene ester as the intermediate layer, and carboxyl acrylate polymer as the shell was successfully fabricated. The structure of the obtained latex was characterized by fourier transform infrared (FTIR) and transmission electron microscopy (TEM). The stability of the composite latex was tested based on the wet gel weight, Zeta potential, and storage stability, and the corrosion resistance of the composite latex films was analyzed by electrochemical measurements and salt spray tests. The thickness of each layer of the composite latex was calculated by the temperature random multi-frequency modulation DSC (TOPEM-DSC) technique. In addition to the successful emulsion copolymerization that occurred between the modified epoxy resin and acrylate monomer, the presence of carboxyl groups in the obtained latex was evidenced, while the epoxide groups were partially retained. The anticorrosion resistance and stability of the multilayer composite latex with the intermediate layer are better than that of the conventional core-shell latex. The outstanding stability and corrosion resistance is attributed to the multilayer core-shell structure. The TOPEM-DSC approach can accurately determine the thickness of the intermediate layer in the multilayer core-shell particles and is a new strategy for characterizing the core-shell structure of polymer particles with a similar monomer composition.

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Fabrication of an epoxy graft poly(St-acrylate) composite latex and its functional properties as a steel coating

Cited by 23 publications

References 35 publications

The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings

The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings

Photosensitive Composite Inks for Digital Light Processing Four-Dimensional Printing of Shape Memory Capture Devices

Enhanced Anticorrosion Properties through Structured Particle Design of Waterborne Epoxy-Styrene-Acrylate Composite Emulsion

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