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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Amphiphilic diblock copolymers based on sucrose methacrylate: RAFT polymerization and self-assembly

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Marques Marcilli, Raphael Henrique [1] ; Rodrigues Camilo, Ana Paula [1] ; Petzhold, Cesar Liberato [2] ; Felisberti, Maria Isabel [1]
Total Authors: 4
[1] Univ Estadual Campinas, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed Rio Grande do Sul, Inst Chem, PO 15003, BR-91501970 Porto Alegre, RS - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF MOLECULAR LIQUIDS; v. 266, p. 628-639, SEP 15 2018.
Web of Science Citations: 1

Diblock copolymers based on methyl methacrylate and sucrose methacrylate were synthesized by Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerization and characterized by C-13 and H-1 nuclear magnetic resonance and size exclusion chromatography. The copolymers solutions were investigated in terms of solubility, swelling tests and dynamic light scattering in different solvents. Copolymers containing from 5 to 35 mol% of hydrophilic monomer present a typical solubility behavior of amphiphilic polymers and self-assemble capability in solution. While poly(sucrose methacrylate) is water soluble, copolymers self-assemble in water and the highest molar mass copolymers swell, achieving a maximum water swelling ratio of 250%. SEM images of the aggregates formed in water after freeze-drying reveal the presence of monomodal and spherical particles, some of them exhibiting a vesicular structure. The copolymers efficiently promote emulsification of aromatic solvents in water, enabling the transference and stabilization of the aromatic solvent and an aromatic dye in the aqueous phase, suggesting a possible application as delivery systems. Moreover, films of the copolymers prepared by casting from solutions in different solvents are also capable to self-assemble forming mainly lamellar structures, as verified by SAXS. The morphology of dispersed spheres of poly(sucrose methacrylate) throughout a poly(methyl methacrylate) matrix is also observed by AFM and TEM. (C) 2018 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 10/17804-7 - Polymeric composites
Grantee:Maria Isabel Felisberti
Support type: Research Projects - Thematic Grants
FAPESP's process: 16/03394-8 - Synthesis of amphiphilic and block copolymers via RAFT and ATRP
Grantee:Maria Isabel Felisberti
Support type: Research Grants - Visiting Researcher Grant - Brazil
FAPESP's process: 15/25406-5 - Organizing matter: colloids formed by association of surfactants, polymers and nanoparticles
Grantee:Watson Loh
Support type: Research Projects - Thematic Grants