Controllable preparation of high-yield magnetic polymer latex

• Published in: Journal of colloid and interface science 2011-09, Vol.361 (1), p.49-58
• Main Authors: Wu, Chun-Chao, Kong, Xiang-Ming, Yang, Hai-Long
• Format: Article
• Language: English
• Subjects: Cements; Chemistry; Coatings; Colloidal state and disperse state; Conversion; Cross-Linking Reagents; crosslinking; Emulsions; Emulsions - chemistry; Emulsions. Microemulsions. Foams; Exact sciences and technology; General and physical chemistry; Initiators; Latex; Latex - chemistry; magnetic materials; Magnetic polymers; Magnetics; Miniemulsion polymerization; Monomers; Morphology; oils; Oils - chemistry; Polymerization; Polymerization procedure; polymers; Strategy; Surface-Active Agents; Water - chemistry
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2011.04.114

Four different miniemulsion polymerization procedures was designed and implemented. Magnetic template-dosage procedure is found to be the most effective for synthesizing high yield magnetic polymer latex. [Display omitted] ► A reproducible method, characterized by latex with high monomer conversion and high magnet content is introduced. ► Four different miniemulsion polymerization procedures was designed and implemented. ► The detail discussion on the preparation parameter is also given for accomplishing the systematic work. In order to overcome the low conversion and complex post-treatment, four different polymerization procedures were adopted to prepare the magnetic polymer latexes. The results clearly show that the strategy using magnetic emulsion template-dosage is the most effective and feasible. Based on the optimized procedure, various factors including the type of initiators such as oil soluble initiator, water soluble initiator, redox initiator system, crosslinking agent, functional monomers etc. were systematically studied. Magnetic polymer latex with high monomer conversion of 83% and high magnet content of 31.8% was successfully obtained. Besides, core–shell structured magnetic polymer latex with good film forming property was also prepared, which is promising for potential applications such as magnetic coatings and modification of cementitious materials with controlled polymer location.