The effect of concentration and silica surface modification on the poly(butyl acrylate-co-methyl methacrylate) properties
| Autor: | Zrinka Buhin Šturlić, Mirela Leskovac, Sanja Lučić Blagojević, Krunoslav Žižek |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Nanocomposite
Materials science Colloidal silica Butyl acrylate emulsions nanocomposite silica polyacrylate Cationic polymerization Emulsion polymerization 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound chemistry Chemical engineering Emulsion Materials Chemistry Surface modification Thermal stability 0210 nano-technology |
| Popis: | Purpose The purpose of this paper is to prepare stabile emulsions with 0–15% of colloidal silica and high monomer/water ratio and to investigate the influence of silica addition and surface modification on the polyacrylate properties. Design/methodology/approach Improving the properties of the composite can be achieved by optimizing the compatibility between the phases of the composite system with improving the interactions at the matrix/filler interface. Therefore, the silica surface was modified with nonionic emulsifier octylphenol ethoxylate, cationic initiator 2,2'-azobis-(amidinopropane dihydrochloride) and 3-methacryloxypropyltrimethoxysilane and polyacrylate/silica nanocomposites were prepared via in situ emulsion polymerization. Particle size distribution, rheological properties of the emulsions and morphology, thermal properties and mechanical properties of the film prepared from the emulsions were investigated. Findings Polyacrylate/silica systems with unmodified silica, silica modified with nonionic emulsifier and cationic initiator have micrometer, while pure PA matrix and systems with silica modified with silane have nanometer particle sizes. Addition and surface modification of the filler increased emulsion viscosity. Agglomeration of silica particles in composites was reduced with silica surface modification. Silica filler improves thermal stability and tensile strength of polyacrylate. Originality/value This paper provides broad spectrum of information depending on filler surface modification and latex preparation via in situ emulsion polymerization and properties with high amount of filler and monomer/water ratio with the aim that prepared latex is suitable for film formation and final application. |
| Databáze: | OpenAIRE |
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