Thermodynamic confinement and α-helix persistence length in poly(γ-benzyl-L-glutamate)-b-poly(dimethyl siloxane)-b-poly(γ-benzyl-L-glutamate) triblock copolymers

The structure and the associated dynamics of a series of poly(?-benzyl-L-glutamate)-b-poly(dimethyl siloxane)-b-poly(?-benzyl-L-glutamate) (PBLG-b-PDMS-b-PBLG) triblock copolymers were investigated using small- and wide-angle X-ray scattering, NMR, transmission electron microscopy, and dielectric spectroscopy, respectively. The structural analysis revealed phase separation in the case of the longer blocks with defected ?-helical segments embedded within the block copolymer nanodomains. The ?-helical persistence length was found to depend on the degree of segregation; thermodynamic confinement and chain stretching results in the partial annihilation of helical defects. © 2006 American Chemical Society.


Published in:
Biomacromolecules, 7, 2, 618-626
Year:
2006
Note:
15257797 (ISSN), Cited By (since 1996): 4, Export Date: 25 September 2007, Source: Scopus, CODEN: BOMAF, doi: 10.1021/bm050772t
Other identifiers:
Scopus: 2-s2.0-33644608150
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 Record created 2007-10-15, last modified 2018-03-17


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