Synthesis of submicron-sized composite particles with unique morphology by emulsifier-free seeded emulsion copolymerization--颗粒学报PARTICUOLOGY

Chu, H., Wang, H., Ni, Z., Liu, X., & Chen, M. (2008). Synthesis of submicron-sized composite particles with unique morphology by emulsifier-free seeded emulsion copolymerization. Particuology, 6(5), 369–375. https://doi.org/10.1016/j.partic.2008.06.002

Synthesis of submicron-sized composite particles with unique morphology by emulsifier-free seeded emulsion copolymerization

Hong Chu, Hongyan Wang, Zhongbin Ni, Xiaoya Liu, Mingqing Chen^*

School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China

10.1016/j.partic.2008.06.002

Volume 6, Issue 5, October 2008, Pages 369-375

Received 19 February 2008, Accepted 27 June 2008, Available online 12 September 2008.

E-mail: mqchen@jiangnan.edu.cn

Highlights

Abstract

Polystyrene (PSt) microspheres with diameter of 375 nm to be used as the seeds for seeded emulsion polymerization were prepared via emulsion polymerization using potassium persulfate (KPS) as initiator in ethanol–water mixed solvents. Emulsifier-free seeded emulsion copolymerization of styrene (St) with acrylonitrile (AN) was carried out in the presence of poly(ethylene glycol) monomethoxymonomethacrylate (PEGm) macromonomer as reactive stabilizer and 2,2′-azobisisobutyronitrile (AIBN) as initiator to obtain submicron-sized PEGm graft poly(styrene-co-acrylonitrile) (PEGm-g-PSAN) composite particles with unique morphology. Scanning electron microscopy (SEM) indicated that St and AN together contributed to forming the unusual morphology. The concentration of St and AN, total monomer concentration, initiator type and the monomer adding method remarkably affected the morphology of the composite polymer particles.

Graphical abstract

Keywords

Seed; Composite particle; Emulsifier-free emulsion copolymerization; Morphology

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