Synthesis and characterization of monodisperse emulsion copolymer

Abstract

Monodisperse emulsion copolymer was synthesized by semi-continuous core-shell emulsion polymerization of styrene, butyl acrylate and γ-methacryloxypropyl trimethoxy silane(KH570). The emulsion particles size and its polydispersion were measured by dynamic light scattering(DLS). The properties of emulsion copolymer were characterized by differential scanning calorimetry(DSC), thermogravimetric analysis(TGA) and measurement of contact angle. The particle morphology was observed under a transmission electron microscope(TEM) and atomic force microscopy(AFM). The results indicate that emulsion nanoparticles containing silicon possess core-shell structures and narrow polydispersity(PDI≤0.08). The thermal stability and hydrophobicity of emulsion copolymer were improved with KH570 introduced into the system.

Keywords

γ-Methacryloxypropyl trimethoxy silane(KH570) / Emulsion polymerization / Monodisperse nanoparticle

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