Dimension of linear polymer and polymer brush of a polyampholyte in aqueous solutions with various ionic strengths

POLY 402

Yasuhiro Matsuda, matsuday@cstf.kyushu-u.ac.jp1, Motoyasu Kobayashi1, Masahiko Annaka2, Kazuhiko Ishihara, ishihara@bmw.mm.t.u-tokyo.ac.jp3, and Atsushi Takahara, takahara@cstf.kyushu-u.ac.jp1. (1) Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Japan, (2) Department of Chemistry, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka, Japan, (3) Department of Materials Science, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8656, Japan
Poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) is a polyampholyte with phosphorylcholine groups in its side chains. For its excellent biocompatibility and ability as lubricant, PMPC is expected to be used as medical material such as artificial joints. We investigated the dimensional change of PMPC with various ionic strength by static and dynamic light scattering. Free linear polymer chains were synthesized by ATRP, and PMPC-grafted silica particles, which were synthesized by the surface initiated polymerization of MPC from silica nano-particles. Although PMPC has both positive and negative charges, its dimension and intermolecular interaction of free linear polymer chains and PMPC-grafted silica particles were independent from the ionic strength of solutions. Independence of dimension from ionic strength may contribute usefulness of PMPC as medical material by certifying the stable performance under wide range of salt concentration.
 

Synthetic and Biological Macromolecules for Emerging Nanotechnologies
6:00 PM-8:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007