Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5186829 | Polymer | 2005 | 4 Pages |
Abstract
Radical polymerization of N-isopropylacrylamide (NIPAAm) in CHCl3 at low temperatures in the presence of pyridine N-oxide (PNO) was investigated. An isotactic poly(NIPAAm) with meso diad content of 61% was successfully prepared at â60 °C in the presence of a two-fold amount of PNO. Thermodynamic analysis suggested that the isotactic-specificity was entropically induced, probably due to conformational fixation near the propagating chain-end through coordination by PNO.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Tomohiro Hirano, Hideaki Ishizu, Makiko Seno, Tsuneyuki Sato,