Production of anomalous polymer microspheres having uneven surfaces by “stepwise” heterocoagulation technique

摘要: Anomalous polymer microspheres having uneven surfaces were produced by “stepwise” heterocoagulation technique of small particles (SPs) onto large (LPs).SPs andLPs have surface charges opposite to each other in the emulsion states.SPs copolymerization styrene and methacryloyloxyethyltrimethylammonium chloride, terpolymerization styrene, butyl acrylate methacrylic acid, with nonionic emulsifier being used both cases. Maximum covering ofLP bySPs was obtained under conditions that emulsions blended without coagulation at pH 3 room temperature then left stand coagulate 70 °C for 4 h 9.