Premium
Lower critical solution temperature behavior of amphiphilic copolymers based on polyaspartamide derivatives
Author(s) -
Bach Quang Vu,
Moon JongRok,
Lee Doo Sung,
Kim JiHeung
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27138
Subject(s) - lower critical solution temperature , copolymer , polymer chemistry , aqueous solution , amphiphile , cloud point , polymer , condensation polymer , materials science , chemical engineering , chemistry , organic chemistry , composite material , engineering
Novel copolymers consisting of poly( N ‐isopropylaminoethyl‐ co ‐6‐hydroxyhexyl aspartamide) and poly ( N ‐isopropylaminoethyl‐ co ‐hexyl aspartamide) were prepared from polysuccinimide, which was the thermal polycondensation product of L ‐aspartic acid, via a ring‐opening reaction with 6‐amino‐ L ‐hexanol (AH) or hexylamine (HA) and N ‐isopropylethylenediamine at different ratios. The copolymers, containing 75–90 mol % of AH and 35–45 mol % of HA, produced thermoresponsive polymers through their lower critical solution temperatures (LCSTs) in aqueous solution. We could control the LCST could be controlled by modifying the hydrophobic–hydrophilic balance by changing the content of AH or HA. The pH dependencies of the LCST were opposite in these two different copolymer systems. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008