| Texto completo | |
| Autor(es): |
Silva, Rodrigo Duarte
[1]
;
Chaparro, Thaissa de Camargo
[1, 2]
;
Monteiro, Igor Stefanichen
[1]
;
Dugas, Pierre-Yves
[2]
;
D'Agosto, Franck
[2]
;
Lansalot, Muriel
[2]
;
dos Santos, Arnilton Martins
[1]
;
`Bourgeat-Lami, Elodie
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Engn Sch Lorena, Lab Polymers, BR-12602810 Lorena, SP - Brazil
[2] Univ Claude Bernard Lyon 1, Univ Lyon, CPE Lyon, CNRS, UMR 5265, C2P2, 43 Bvd 11 Novembre 1918, F-69616 Villeurbanne - France
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MACROMOLECULES; v. 52, n. 13, p. 4979-4988, JUL 9 2019. |
| Citações Web of Science: | 2 |
| Resumo | |
In this work, we report the reversible addition fragmentation chain transfer (RAFT)-mediated synthesis of polymer/montmorillonite (MMT) hybrid latexes by surfactant-free emulsion polymerization. Macromolecular RAFT (macro-RAFT) agents combining repeating units of acrylic acid (AA), n-butyl acrylate (BA), poly(ethylene glycol) methyl ether acrylate (PEGA), or 2-(dimethylamino)ethyl methacrylate (DMAEMA) were adsorbed on exfoliated sodium MMT platelets and the resulting aqueous colloidal dispersions were used as the reaction medium for emulsion copolymerization of methyl methacrylate and BA under starved-feed conditions. The AA- and PEGA-containing macroRAFT agents led to the formation of polymer-decorated-clay platelets, indicating some affinity of the growing polymer chains for the clay surface, albeit not sufficient for the complete encapsulation of the clay sheets inside the polymer particles. When DMAEMA-based macroRAFT agents were used, transmission electron microscopy analyses of the hybrid latexes revealed the formation of a polymer layer on the MMT platelets indicating that the polymerization took place on the inorganic surface resulting in full encapsulation while preserving the shape anisotropy of the original clay mineral. (AU) | |
| Processo FAPESP: | 10/50383-5 - Polymer-encapsulation of anisotropic inorganic particles by raft-mediated emulsion polymerization |
| Beneficiário: | Amilton Martins dos Santos |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 11/20533-8 - Encapsulação de montmorilonita via polimerização radicalar controlada do tipo RAFT em emulsão para produção de filmes nanoestruturados com propriedades anisotrópicas |
| Beneficiário: | Rodrigo Duarte Silva |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |