Characterisation and properties of purely acrylic latex with submicro particle size prepared with mixed surfactants of sodium dodecyl benzene sulphonate and allyloxy nonylphenoxy propanol polyoxyethylene ether

Abstract

The purely acrylic latex with submicro particle size was prepared via semi-continuous seeded emulsion polymerisation of butyl acrylate and methyl methacrylate in water phase initiated with potassium persulphate and emulsified with mixed surfactants of sodium dodecyl benzene sulphonate and allyloxy nonylphenoxy propanol polyoxyethylene ether (ANPPE). The structure of the resultant latex is confirmed with Fourier transform infrared spectroscopy spectrum. Differential scanning calorimetry also confirms that the resultant latex is a type of random copolymer and the consistency among the chain segment is fairly good. Influences of the amount of ANPPE on the properties of the resultant latex and its film were investigated in detail. Results show that the contact angle of the film first is increased and then decreased with the increase of the amount of SN-10. The glass transition temperature of the film is decreased with the increase of the amount of SN-10. However, the particle size of the latex is increased with the increase of the amount of SN-10.