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Regulation of Micellar Morphology of PCL-b-PEO Block Copolymers by Crystallization Temperature

✍ Scribed by Zi-Xiu Du; Jun-Ting Xu; Zhi-Qiang Fan

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
185 KB
Volume
29
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

The effect of crystallization temperature on the micellar morphology of PCL‐b‐PEO block copolymers in water has been studied. It is found that the micellar morphology of PCL~n~PEO~44~ and PCL~n~PEO~113~ changes with crystallization temperature in different ways because of two competitive factors: perfection of the PCL crystals in the core and deformation of the soluble PEO block. For PCL~n~PEO~44~, perfection of the PCL crystals dominates the micellar morphology and lamellar micelles are formed at a higher crystallization temperature. For PCL~n~PEO~113~ the micellar morphology is mainly determined by the tethering density and spherical micelles or cylindrical micelles with a larger length/diameter ratio are formed at a higher crystallization temperature because of the larger tethering density.

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