2021
DOI: 10.1021/acs.macromol.1c01195
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Polymer/Laponite Nanocomposite Films Produced from Surfactant-Free Latexes using Cationic Macromolecular Reversible Addition-Fragmentation Chain Transfer Copolymers

Abstract: In this work, the use of positively charged macromolecular reversible addition-fragmentation chain transfer (RAFT) copolymers (macroRAFTs) in the synthesis of Laponite® RD-based nanocomposite latex particles is described. For this purpose, two different amphiphilic copolymers composed of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and n-butyl acrylate (BA) units are investigated. In a first step, the macroRAFT is adsorbed onto Laponite® and then in a second step, the macroRAFT-modified clay platelets are used… Show more

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Cited by 4 publications
(12 citation statements)
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“…Meanwhile, the PDI of hybrid latex particles increased from 0.187 (MMA/BA = 10:1) to 0.228 (MMA/BA = 1:1) as well as the zeta potential decreased from +46.2 to +32.8 eV, implying the stability of hybrid latex deteriorated. These results were attributed to the addition of soft monomer driving the latex to deform, resulting in the easier formation of a copolymer film on the surface of irregular pigment particles and adhesion between the pigment particles was easy to occur. , As a result, P.R-170 was inclined to migrate to the polymer/water interface to form the agglomeration hybrid particles during the polymerization, which agreed with the literature of RAFT-mediated hybrid emulsion polymerization toward film-formation hybrid latex films by Bourgeat-Lami et al , On the other hand, the DSC curves (Figure S5) also proved that the T g values of the P­(MMA- co -BA) shell gradually decreased with the increasing concentration of soft monomer. The T g values (Table , run 1 to run 5) were 28.2, 18.0, 7.5, 6.5, and 2.5 °C for the corresponding copolymer encapsulated P.R-170 hybrid latex films, and these minimum film forming temperatures (Table , run 2 to run 5) were 7.35, 6, 4.4, and 2.5 °C, respectively.…”
Section: Resultssupporting
confidence: 89%
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“…Meanwhile, the PDI of hybrid latex particles increased from 0.187 (MMA/BA = 10:1) to 0.228 (MMA/BA = 1:1) as well as the zeta potential decreased from +46.2 to +32.8 eV, implying the stability of hybrid latex deteriorated. These results were attributed to the addition of soft monomer driving the latex to deform, resulting in the easier formation of a copolymer film on the surface of irregular pigment particles and adhesion between the pigment particles was easy to occur. , As a result, P.R-170 was inclined to migrate to the polymer/water interface to form the agglomeration hybrid particles during the polymerization, which agreed with the literature of RAFT-mediated hybrid emulsion polymerization toward film-formation hybrid latex films by Bourgeat-Lami et al , On the other hand, the DSC curves (Figure S5) also proved that the T g values of the P­(MMA- co -BA) shell gradually decreased with the increasing concentration of soft monomer. The T g values (Table , run 1 to run 5) were 28.2, 18.0, 7.5, 6.5, and 2.5 °C for the corresponding copolymer encapsulated P.R-170 hybrid latex films, and these minimum film forming temperatures (Table , run 2 to run 5) were 7.35, 6, 4.4, and 2.5 °C, respectively.…”
Section: Resultssupporting
confidence: 89%
“…The macro-RAFT agents have strong adsorption capacity on the surface of NPs, and colloidal hybrid latex particles are constructed via RAFT-mediated emulsion polymerization, due to outstanding stability . Recently, the Bourgeat–Lami group discovered the surfactant-free emulsion polymerization of styrene, which was mediated by trithiocarbonate polyethylene oxide as a macro-RAFT agent, and polymer-encapsulated Laponite clay flakes to form dumbbell structures. , Afterward, they studied the diverse morphological composite colloidal particles obtained by surfactant-free RAFT emulsion polymerization under the action of a range of macro-RAFT agents containing polyethylene oxide. , Guimaraes, Silva, and others had also used macro-RAFT agents to prepare polymer/Laponite hybrid latex particles with different morphologies. ,, In our earlier study, we encapsulated C.I. Pigment Red 170 (P.R-170) in a film-forming copolymer using cationic amphiphilic macro-RAFT agents .…”
Section: Introductionmentioning
confidence: 99%
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“…It plays an essential role in the manufacturing of numerous composites notably. [1][2][3][4][5][6] Nanoscale inorganic elements must be compatible with the polymer phase and appropriately disseminated in the polymeric matrix. For this reason, magnetite nanoparticles are often chosen to be employed together with additives such as silica and clay to improve physical, mechanical, chemical, and thermal behavior.…”
Section: Introductionmentioning
confidence: 99%
“…Several studies 1,3,[8][9][10][11][12][13][14][15][16][17][18][19][20] synthesized polymer composites including nanoparticles by using different polymerization processes. In this study, we aimed to incorporate MNPs into polymer emulsions by mini-emulsion polymerization approach.…”
Section: Introductionmentioning
confidence: 99%