Premium
Synthesis of Thermoresponsive Polyurethane from 2‐Methylaziridine and Supercritical Carbon Dioxide
Author(s) -
Ihata Osamu,
Kayaki Yoshihito,
Ikariya Takao
Publication year - 2004
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200352215
Subject(s) - lower critical solution temperature , supercritical carbon dioxide , supercritical fluid , polyurethane , copolymer , aqueous solution , materials science , chemical engineering , polymer chemistry , transmittance , carbon dioxide , polymer , composite material , organic chemistry , chemistry , optoelectronics , engineering
Under pressure : Temperature‐dependent optical transmission in aqueous solution is exhibited by polyurethanes that are obtained by copolymerization of 2‐methylaziridine and supercritical CO 2 (scCO 2 ; see scheme). The transmittance drops sharply at the lower critical solution temperature (LCST). The molecular weight, content of urethane linkages, and LCST value of the polyurethanes are controllable simply by changing the CO 2 pressure.