| Abstract: | Basic groups chemically bound to the surface of particles (surface basic groups) in cationic polystyrene latexes prepared by using 2,2′-azobis(2-amidinopropane) hydrochloride as initiator (initiator process) or by copolymerizing dialky aminoethyl methacrylates (copolymerization process) have been determined. It is clarified that in the initiator process amidino endgroups of polymers are effectively localized on the surface of particles and the latex is sufficiently stabilized with surface amidino groups. In the copolymerization process, the neutralized form of dialkylaminoethyl methacrylates is preferably localized on the surface of particles and the latex is sufficiently stabilized with surface amino groups. A particle formation process in both cases has been proposed. |
