Smart polymer nanoparticles for high-performance water-borne coatings

Poly(butyl methacrylate) nanoparticles encapsulating a silica precursor, tetraethoxysilane (TEOS), were synthesized by a two-step emulsion polymerization process. We show that TEOS remains mostly unreacted inside the nanoparticles in water but acts both as a plasticizer and cross-linker in films cas...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1999. - 30(2014), 41 vom: 21. Okt., Seite 12345-53
1. Verfasser: Piçarra, Susana (VerfasserIn)
Weitere Verfasser: Fidalgo, Alexandra, Fedorov, Aleksander, Martinho, José M G, Farinha, José Paulo S
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a Poly(butyl methacrylate) nanoparticles encapsulating a silica precursor, tetraethoxysilane (TEOS), were synthesized by a two-step emulsion polymerization process. We show that TEOS remains mostly unreacted inside the nanoparticles in water but acts both as a plasticizer and cross-linker in films cast from the dispersions. The diffusion-enhancing plasticizing effect is dominant at annealing temperatures closer to the glass-transition temperature of the polymer, and sol-gel cross-linking reactions predominate at higher temperatures. By choosing an appropriate annealing temperature, we were able to balance polymer interdiffusion and silica cross-linking to obtain films with good mechanical properties and excellent chemical resistance. The hybrid cross-linked films produced from these novel "smart" nanoparticles can be used in water-borne environmentally friendly coatings for high-performance applications 
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700 1 |a Fedorov, Aleksander  |e verfasserin  |4 aut 
700 1 |a Martinho, José M G  |e verfasserin  |4 aut 
700 1 |a Farinha, José Paulo S  |e verfasserin  |4 aut 
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