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Structural and thermosensitive properties of cyclotriphosphazenes with poly(ethylene glycol) and amino acid esters as side groups

Title
Structural and thermosensitive properties of cyclotriphosphazenes with poly(ethylene glycol) and amino acid esters as side groups
Authors
Sang Beom LeeSong S.-C.Jin J.-I.Youn Soo Sohn
Ewha Authors
손연수
SCOPUS Author ID
손연수scopus
Issue Date
2001
Journal Title
Macromolecules
ISSN
0024-9297JCR Link
Citation
vol. 34, no. 21, pp. 7565 - 7569
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Structural and thermosensitive properties of cyclotriphosphazenes with poly(ethylene glycol) and Amino Acid esters as side groups were studied. The nucleophilic subsitution of hexachlorocylotriphosphazene with alkoxy polyethylene glycol (APEG) gave predominantly the cis-nongeminal isomer at low reaction temperature. A large amount of cis- and trans-isomers were also produced. Hetrogenously substituted thermosensitive trimers were synthesized by stereocontrolled partial substitution of N 3P 3Cl 6 with low molecular APEG followed by the aminolysis of the remained chloride functions with AAE. The phase transition rate of the thermosensitive trimers was found to be very fast and responsive even in dilute concentrations.
DOI
10.1021/ma010648b
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자연과학대학 > 화학·나노과학전공 > Journal papers
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