Synthesis and characterization of hyperbranched polymer by cationic ring-opening polymerization of 3,4-epoxycyclohexanemethanol

POLY 157

Yoshikazu Kitajyo, kitajyo@poly-bm.eng.hokudai.ac.jp1, Masaki Tamaki, tamaki@poly-bm.eng.hokudai.ac.jp1, Harumi Kaga2, Noriaki Kaneko3, Toshifumi Satoh, satoh@poly-mc.eng.hokudai.ac.jp1, and Toyoji Kakuchi, kakuchi@poly-mc.eng.hokudai.ac.jp1. (1) Graduate School of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, 060-8628, Japan, (2) National Institute of Advanced Industrial Science and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-Ku, Sapporo 060-8628, 062-8517, Japan, (3) MACROTEC Co, 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo, 062-8517, Japan
We studied the synthesis of a novel hyperbranched polymer (poly-1) by the cationic ring-opening polymerization of 3,4-epoxycyclohexanemethanol (1) using boron trifluoride diethyletherate (BF3•OEt2) as a catalyst. Poly-1 was soluble in polar organic solvent and insoluble in non-polar organic solvent and water. For the 13C NMR measurement, it was cleared that poly-1 was a hyperbranched polymer with a numerous terminal unit and the degrees of branching (DBs) of poly-1 were in the range from 0.36 to 0.42. The viscosity of poly-1 was very low, and that the Mark-Houwink constant a was 0.22, suggesting that poly-1 had a spherical shape in solution. In addition, the glass transition temperature (Tg) of poly-1 was ca. 105 oC, which was lower than that of the corresponding linear polymer (poly-2).
 

General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

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