SMA Resins: a Polymeric Surfactant for Emulsion Polymerisation
ثبت نشده
چکیده
By using SMA resins as a polymeric surfactant in an emulsion polymerisation process, alone or in combination with other surfactants, the stability of the dispersion under different kinds of stress (chemical, high shear or freeze/thaw) is significantly improved. The presence of SMA copolymer, adsorbed at the surface of the particles of an acrylic dispersion, enhances the stability of the latex by an increase of electrostatic repulsion (See “Electrostatic stabilisation of acrylic emulsion by SMA). This advantage is very important for inks and lacquers applications where the shear stress, during the printing process, is very high (> 1 000 000 s-1).
منابع مشابه
Covalent incorporation of the surfactant into high internal phase emulsion templated polymeric foams.
High internal phase emulsions of water in cyclooctene stabilised by sorbitan monooleate (Span 80) were cured by ring-opening metathesis polymerisation to release fully open macroporous polymer foams wherein the surfactant was covalently incorporated into the poly(cyclooctene) strands via chain transfer reactions.
متن کاملEmulsion Polymerization of Vinyl Acetate in the Presence of a New Cationic Surfactant
In this study, the emulsion homopolymerization system containing vinyl acetate, potassium persulfate, a new cationic polymeric surfactant and water was studied by the applying semi-continuous emulsion polymerization process. The effects of new polymeric emulsifier on the physicochemical properties of obtained vinyl acetate latexes were investigated depending on vinyl acetate percentage in the p...
متن کاملRing Opening Metathesis Polymerisation (ROMP) as a tool for polyHIPes with extraordinary mechanical properties.
PolyHIPE materials have been prepared by Ring Opening Metathesis Polymerisation (ROMP) of dicyclopentadiene. Two characteristic features for successful stabilization of high internal phase emulsions (HIPEs) were tuned in order to achieve improvements regarding mechanical properties of polyHIPEs. Mechanical properties of the new materials were related to variations of the surfactant concentratio...
متن کاملSpectroscopic chemical insights leading to the design of versatile sustainable composites for enhanced marine application
The viability of a novel sustainable polymeric composite material, based on photocurable linseed oil resin was explored, with a view to exploiting its potential in marine environments. The study focused on a UV-curable resin subjected to setting through photoinitiated cationic polymerisation. Deployment of heterogeneous solid catalysts, containing isolated Brønsted acid centres, further improve...
متن کاملSynthesized some copolymer derivative of poly (Styrene –alternative- Maleic Anhydride) (SMA) for removal Cobalt (II) ions from aqueous solutions and determination residual cobalt (II) ions by using spectrophotometric method
Chelating resins have been considered to be suitable materials for the recovery of heavy metals in water treatments. A chelating resin based on modified poly(styrene-alt-maleic anhydride) with Melamine was synthesized. This modified resin was further reacted with 1,2-diaminoethan in the presence of ultrasonic irradiation for the preparation of a tridimensional chelating resin on the nanoscale f...
متن کامل