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Terminal Modification with 1‐Adamantylamine to Endow Hyperbranched Polyamidoamine with Thermo‐/pH‐Responsive Properties
Author(s) -
Guo Zhe,
Zhang Yongwen,
Huang Wei,
Zhou Yongfeng,
Yan Deyue
Publication year - 2008
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800450
Subject(s) - solubility , aqueous solution , materials science , polymer chemistry , chemical engineering , chemical modification , polymer , nuclear magnetic resonance spectroscopy , spectroscopy , chemistry , organic chemistry , composite material , physics , quantum mechanics , engineering
A novel terminal modification agent to endow hyperbranched polyamidoamine (HPAMAM) with thermo‐/pH‐responsive properties is reported. HPAMAM with terminal vinyl groups is first synthesized and then end‐capped by 1‐adamantylamine (ADA). The resulting hyperbranched polymer (HPAMAM‐ADA) shows interesting thermo‐responsive properties in aqueous solution, which have been investigated by UV‐vis spectroscopy, optical microscopy, and 1 H NMR spectroscopy. The lower critical solution temperature can be controlled by adjusting the end‐capping ratio of ADA. In addition, HPAMAM‐ADA exhibits a pH‐dependent water solubility. This pH‐responsive behavior is also studied.