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

被引：19

作者：

Lee, SB

Song, SC ^{[1
]}

Jin, JI

Sohn, YS

机构：

[1] Korea Inst Sci & Technol, Inorgan Chem Lab, Seoul 130650, South Korea

[2] Korea Univ, Dept Chem, Seoul 136701, South Korea

[3] Ewha Womans Univ, Dept Chem, Seoul 120750, South Korea

来源：

MACROMOLECULES | 2001年 / 34卷 / 21期

关键词：

D O I：

10.1021/ma010648b

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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 N3P3Cl6 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.

引用

页码：7565 / 7569

页数：5

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