Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (7): 1434.

• Articles • Previous Articles     Next Articles

Soap-free Seeded Dispersion Polymerization Toward Monodisperse pH- and Temperature-Responsive Microgels

LI Xin1*, ZUO Ju2, LIU Ru1, LI Yong1   

  1. 1. Department of Chemistry, Jiaying University, Meizhou 514015, China;
    2. College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2008-12-23 Online:2009-07-10 Published:2009-07-10
  • Contact: LI Xin. E-mail: mzlixin@jyu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20174019)资助.

Abstract:

Monodisperse core-shell microgels with pH- and temperature-sensitivity were prepared by soap-free seeded dispersion polymerization with N-isopropylacrylamide and 2-vinylpyridine as main monomers. Scanning electron microscopy and dynamic laser light scattering were employed to investigate the structure and property. Independent and unperturbed pH- and temperature-sensitivity were observed in the swelling investigation, i.e., the volume phase transition temperature (VPTT) of the microgels keeps almost the same as that of pure poly(N-isopropylacrylamide) (PNIPAM) gels. It is concluded that pH-ionizable monomer with local distribution does not perturb the VPTT of PNIPAM gels.

Key words: Soap-free seeded dispersion polymerization; Monodisperse; Sensitivity; Microgels

TrendMD: