writer：Wenqin Wang,* Guohong Ren, Yanqiong Yang, Wujin Cai, and Tao Chen*
keywords：nonspherical latex particle; emulsifier-free polymerization; template-assisted method
source：期刊
specific source：Langmuir, 2015, 31, 105?109
Issue time：2015年
A facile method to prepare the nonspherical amphiphilic random copolymer of poly(styrene-co-methacrylic acid) (poly(St-co-PMAA)) latex particles with well-defined shapes and high yields by one-step batch emulsifier-free polymerization was demonstrated. In our strategy, only varying the molar ratio of styrene (St) to methacrylic acid (MAA), no seed-particles, no cross-linker and no multi-step control procedures were needed.  Due to the presence of carboxyl groups on the surface of (poly(St-co-PMAA) latex particles, these latex particles can be used as templates for fabricating core-shell nonspherical functional materials, such as poly(St-co-PMAA)@SiO₂, poly(St-co-PMAA)@polypyrrole). The corresponding nonspherical hollow structures (SiO₂ and polypyrrole) could be obtained after removal of the templates. In addition, poly(St-co-PMAA) latex particles exhibit interesting morphologies in ethanol.