Title of article :
Hydrogen-bond-assisted isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide
Author/Authors :
Hirano، نويسنده , , Tomohiro and Ishizu، نويسنده , , Hideaki and Seno، نويسنده , , Makiko and Sato، نويسنده , , Tsuneyuki، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2005
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 −60 °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.
Keywords :
N-isopropylacrylamide , Pyridine N-oxide , Isotactic-specific radical polymerization
