Polymer/Laponite Nanocomposite Films Produced from Surfactant-Free Latexes using Cationic Macromolecular Reversible Addition-Fragmentation Chain Transfer Copolymers (2021)
- Authors:
- Autor USP: SANTOS, AMILTON MARTINS DOS - EEL
- Unidade: EEL
- DOI: 10.1021/acs.macromol.1c01195
- Subjects: POLÍMEROS (QUÍMICA ORGÂNICA); NANOCOMPOSITOS; NANOPARTÍCULAS
- Keywords: Clay; Monomers; Nanocomposites; Nanoparticles; Polymer particles
- Agências de fomento:
- Language: Inglês
- Abstract: In this work, the use of positively charged macromolecularreversible addition-fragmentation chain transfer (RAFT) copolymers (macro-RAFTs) in the synthesis of Laponite RD-based nanocomposite latex particlesis described. For this purpose, two different amphiphilic copolymerscomposed of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and n-butyl acrylate (BA) units are investigated. In the first step, the macroRAFT isadsorbed onto Laponite, and then, in the second step, the macroRAFT-modified clay platelets are used in the emulsion copolymerization of methylmethacrylate (MMA), methyl acrylate (MA), or styrene (Sty), with BA. Byacting as both coupling agents and stabilizers, the macroRAFT agents lead tothe formation of partially encapsulated particles and dumbbell structures.When hydrophobic monomer mixtures that can form film are used, these morphologies result in nanocomposite films with increasedstiffness, in comparison to the pure polymer matrix. As observed by dynamic mechanical analysis, the high Young’s modulus levelpresented by the composite films in the rubbery plateau (above 100 MPa when filled with 10 wt% of clay) highlights the strongmechanical reinforcement. Such an improvement can be attributed to the formation of two percolating networks, one ofhomogeneously distributed and connected platelets and one of macroRAFT chains, within the polymer matrix.
- Imprenta:
- Publisher: ACS
- Publisher place: Washington-DC
- Date published: 2021
- Source:
- Título: Macromolecules
- ISSN: 0024-9297
- Volume/Número/Paginação/Ano: v.54, p.7480-7491, 2021
- Este artigo possui versão em acesso aberto
- URL de acesso aberto
- Versão do Documento: Versão submetida (Pré-print)
-
Status: Artigo possui versão em acesso aberto em repositório (Green Open Access) -
ABNT
CHAPARRO, Thaíssa de Camargo et al. Polymer/Laponite Nanocomposite Films Produced from Surfactant-Free Latexes using Cationic Macromolecular Reversible Addition-Fragmentation Chain Transfer Copolymers. Macromolecules, v. 54, p. 7480-7491, 2021Tradução . . Disponível em: https://doi.org/10.1021/acs.macromol.1c01195. Acesso em: 10 mar. 2026. -
APA
Chaparro, T. de C., Silva, R. D., D'Agosto, F., Lansalot, M., Dalmas, F., Chazeau, L., et al. (2021). Polymer/Laponite Nanocomposite Films Produced from Surfactant-Free Latexes using Cationic Macromolecular Reversible Addition-Fragmentation Chain Transfer Copolymers. Macromolecules, 54, 7480-7491. doi:10.1021/acs.macromol.1c01195 -
NLM
Chaparro T de C, Silva RD, D'Agosto F, Lansalot M, Dalmas F, Chazeau L, Santos AM dos, Bourgeat-Lami E. Polymer/Laponite Nanocomposite Films Produced from Surfactant-Free Latexes using Cationic Macromolecular Reversible Addition-Fragmentation Chain Transfer Copolymers [Internet]. Macromolecules. 2021 ;54 7480-7491.[citado 2026 mar. 10 ] Available from: https://doi.org/10.1021/acs.macromol.1c01195 -
Vancouver
Chaparro T de C, Silva RD, D'Agosto F, Lansalot M, Dalmas F, Chazeau L, Santos AM dos, Bourgeat-Lami E. Polymer/Laponite Nanocomposite Films Produced from Surfactant-Free Latexes using Cationic Macromolecular Reversible Addition-Fragmentation Chain Transfer Copolymers [Internet]. Macromolecules. 2021 ;54 7480-7491.[citado 2026 mar. 10 ] Available from: https://doi.org/10.1021/acs.macromol.1c01195 - Evaluation of different solvents and solubility parameters on the morphology and diameter of electrospun pullulan nanofibers for curcumin entrapment
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