Preparation of 20-nm poly(styrene derivative) particles via polymerization with nonionic surfactant at the phase-inversion temperature

作者：Suzuki Kiyoshi^*; Nishiyama Kohei; Yamanaka Isao; Koshiba Takatoshi; Satoh Shuzaemon

来源：Polymer Journal, 2012, 44(11): 1077-1081.

DOI：10.1038/pj.2012.75

• emulsion polymerization
• nanometer-sized particles
• nonionic surfactant
• particle-size distribution
• phase-inversion temperature
• polystyrene

Several types of styrene monomer derivatives were polymerized in monomer, water, polyoxyethylene alkyl phenyl ether and initiator mixtures at various temperatures to form small particles. Smaller particles were obtained at higher radical generation rates at the phase-inversion temperature (PIT). Large coagula or secondary particles were obtained at temperatures higher than the PIT. The average diameter of the polymer particles obtained via the polymerization of p-methylstyrene and styrene at the PIT was smaller than those of divinylbenzene and 4-t-butylstyrene. Poly(p-methylstyrene) particles, which had an average diameter of 21nm and a polymer weight fraction of 5%, were prepared. Polymer Journal (2012) 44, 1077-1081; doi:10.1038/pj.2012.75; published online 16 May 2012

• 出版日期2012-11