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Small angle neutron scattering study of the structure and hydration of polyoxyethylene‐ block ‐polyoxybutylene in aqueous solution
Author(s) -
Fairclough J Patrick A,
Norman Alexander Iain,
Shaw Benjamin,
Nace V Mark,
Heenan Richard K
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2044
Subject(s) - micelle , neutron scattering , aqueous solution , small angle neutron scattering , hydrodynamic radius , radius , copolymer , scattering , materials science , phase (matter) , block (permutation group theory) , neutron , crystallography , chemistry , polymer chemistry , polymer , physics , organic chemistry , optics , composite material , geometry , mathematics , computer security , computer science , quantum mechanics
The micellar structure of a polyoxyethylene‐ block ‐polyoxybutylene diblock copolymer (E 18 B 10 ; E = (OCH 2 CH 2 ); B = OCH 2 CH(CH 2 CH 3 )) in water was studied by small angle neutron scattering. Results show a polydisperse spherical micelles at temperatures below 45 °C, a possible mixed phase at 45 °C and flexible worm‐like micelles at 65 °C. The spherical micelles at 25 and 35 °C have radii of 39 and 40 Å and degrees of hydration of 28% and 26%, respectively. The worm‐like micelles have a total length of approximately 1850 Å, with segment lengths of 123 Å, a core radius, R ax = 30 Å and hydration of 23%, at 65 °C. Copyright © 2006 Society of Chemical Industry