Osamu Haba, H. Tajima, M. Ueda
Apr 1, 1998
Citations
0
Influential Citations
8
Citations
Journal
Chemistry Letters
Abstract
A hyperbranched aromatic polyamide was prepared from 5-aminoisophthalic acid by the direct polycondensation method using diphenyl (2,3-dihydro-2-thioxo-3-benzoxazolyl)phosphonate (DBOP) as a condensing agent. The resulting polymer was further reacted with p-anisidine to give methoxy-end-capped polymer (3). IR spectrum of 3 indicates the end-capping was achieved completely. MALDI-TOF MS spectrum of 3 indicates presence of no side-reaction. Number average molecular weight of 3 could be determined by its 1H NMR spectrum and was 1800.