Hydrogen-bond-assisted isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide

Hydrogen-bond-assisted isotactic-specific radical polymerization of N-isopropylacrylamide with pyridine N-oxide
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N-异丙基丙烯酰胺与N-氧化物吡啶的氢键辅助全同立构自由基聚合

DOI:
10.1016/j.polymer.2005.09.025
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发表时间:
2005
期刊:
影响因子:
4.6
通讯作者:
Tsuneyuki Sato
Tsuneyuki Sato
中科院分区:
化学2区
文献类型:
--
作者:
Tomohiro Hirano;H. Ishizu;M. Seno;Tsuneyuki Sato

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研究了n -异丙基丙烯酰胺(NIPAAm)在吡啶n -氧化物(PNO)存在下在chcl3中低温自由基聚合的反应。在- 60℃条件下,在两倍量的PNO存在下,成功制备了中介孔二氮含量为61%的等规聚(NIPAAm)。热力学分析表明,等规特异性是熵诱导的,可能是由于PNO通过配位在传播链末端附近固定构象所致。
Radical polymerization of N-isopropylacrylamide (NIPAAm) in CHCl3at 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.
DOI: 10.1163/156855504322890016
发表时间: 2004-01
影响因子: 1.6
作者:
Mana Ito;Takashi Ishizone
通讯作者: Mana Ito;Takashi Ishizone