Synthesis of clay-armored poly(vinylidene chloride-co-methyl acrylate) latexes by Pickering emulsion polymerization and their film-forming properties
| Autor: | Isabelle Chaduc, Muriel Lansalot, Pierre-Emmanuel Dufils, Jérôme Vinas, Laura Delafresnaye, Pierre-Yves Dugas, Elodie Bourgeat-Lami |
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| Přispěvatelé: | Laboratoire de Chimie, Catalyse, Polymères et Procédés, R 5265 (C2P2), Centre National de la Recherche Scientifique (CNRS)-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC), Solvay (France) |
| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
Materials science Polymers and Plastics Bioengineering 02 engineering and technology 010402 general chemistry complex mixtures 01 natural sciences Biochemistry Chloride Styrene chemistry.chemical_compound Polymer chemistry medicine Methyl acrylate ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Nanocomposite Organic Chemistry Polymer 021001 nanoscience & nanotechnology Pickering emulsion 0104 chemical sciences [CHIM.POLY]Chemical Sciences/Polymers Montmorillonite chemistry Chemical engineering Polymerization 0210 nano-technology medicine.drug |
| Zdroj: | Polymer Chemistry Polymer Chemistry, Royal Society of Chemistry-RSC, 2017, 8 (40), pp.6217-6232. ⟨10.1039/c7py00902j⟩ |
| ISSN: | 1759-9962 1759-9954 |
| DOI: | 10.1039/c7py00902j |
| Popis: | We report the surfactant-free emulsion copolymerization of styrene (Sty)/methyl acrylate (MA) and vinylidene chloride (VDC)/MA by using clay platelets (LAPONITE® or a mixture of LAPONITE® and Montmorillonite) as Pickering stabilizers. Several parameters such as the presence of MA, the clay percentage and the monomer composition were shown to play a crucial role in the formation and stability of the resulting clay-armored particles. Optimal batch conditions led to stable latexes with a shelf life of at least one year. The film-forming process of the clay/P(VDC-co-MA) hybrid latexes was then studied. Transmission electron microscopy analysis of ultrathin cross-sections of the nanocomposite films revealed that latexes with high VDC contents (≥90 wt%) were not film-forming, whereas those of the same polymer composition but without clay led to a continuous film, suggesting that the clay platelets hindered polymer chain interdiffusion. Decreasing the VDC content to 87 wt% enhanced chain mobility, resulting in a uniform film with a honeycomb structure arising from the original clay-armored particle morphology. |
| Databáze: | OpenAIRE |
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