Sodium p-styreneulfonate(NaSS) is a industrially important anionic monomer manufactured from organic bromine compound. NaSS and its (co)polymer are widely used in many application,such as emulsion,dyeing improver,finishing agent for clothes,dispersant,antistatics,ion exchange membrane ,scale inhibitor and oil field chemicals etc. Water soluble copolymers of NaSS with water-soluble monomers,such as acrylic acid,methacrylic acid,acrylonitrile and acrylamide are well known. In contrast, copolymers with water-insoluble monomers has been scarcely reported. We report about the copolymerization of Sodium p-styrenesulfonate(NaSS) with N-substituted maleimide,their properties and application. Homogeneous radical copolymerization was conducted in water-based solution at 60degree C. Copolymerization of equimolar NaSS with N-phenylmaleimide(N-PMI) proceeded smoothly in a homogeneous systems and generated water-soluble polymer (PM-5005). It was assumed that the copolymerization reaction progressed in alternative manner same as styrene with N-PMI(Fig.1). PM-5005 showed higher surface activity than the one of NaSS with equimolar styrene copolymer (ST-5005) (Fig.2). This is caused by the higher weight content of hydrophobic component in PM-5005(45wt%) than ST-5005(34wt%).Moreover,PM-5005 showed markedly higher viscosity than ST-5005 and NaSS homopolymer. This specific viscosity was not observed when N-benzylmalemide(N-BMI) or N-cyclohexylmaleimide (N-CHMI) were used instead of N-PMI. This result suggested that this specific viscosity was attributed to the difference of polymer conformation as well as the monomer sequences and the content of hydrophobic component. PM-5005 can be expected as a heat-resistant thickener and a dispersant for CNT etc. We will report more detail about the properties and application of these NaSS/N-substituted maleimide copolymers on the day.

Novel styrene sulfonate copolymer and its application

249th National Meeting (2015)

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