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Investigation by Combined Solid-State NMR and SAXS Methods of the Morphology and Domain Size in Polystyrene-b-Polyethylene Oxide-b-Polystyrene Triblock Copolymers

Bonk, Fábio A.; Caldarelli, Stefano; Phan, Trang; Bertin, Denis; de Azevedo, Eduardo; Mantovani, Gerson L.; Bonagamba, Tito J.; Plivelic, Tomás LU and Torriani, Iris C. (2010) In Journal of Polymer Science. Part B, Polymer Physics 48(1). p.55-64
Abstract
The microphase structure of a series of polystyrene-b-polyethylene oxide-b-polystyrene (SEOS) triblock copolymers with different compositions and molecular weights has been studied by solid-state NMR, DSC, wide and small angle X-ray scattering (WAXS and SAXS). WAXS and DSC measurements were used to detect the presence of crystalline domains of polyethylene-oxide (PEO) blocks at room temperature as a function of the copolymer chemical composition. Furthermore, DSC experiments allowed the determination of the melting temperatures of the crystalline part of the PEO blocks. SAXS measurements, performed above and below the melting temperature of the PEO blocks, revealed the formation of periodic structures, but the absence or the weakness of... (More)
The microphase structure of a series of polystyrene-b-polyethylene oxide-b-polystyrene (SEOS) triblock copolymers with different compositions and molecular weights has been studied by solid-state NMR, DSC, wide and small angle X-ray scattering (WAXS and SAXS). WAXS and DSC measurements were used to detect the presence of crystalline domains of polyethylene-oxide (PEO) blocks at room temperature as a function of the copolymer chemical composition. Furthermore, DSC experiments allowed the determination of the melting temperatures of the crystalline part of the PEO blocks. SAXS measurements, performed above and below the melting temperature of the PEO blocks, revealed the formation of periodic structures, but the absence or the weakness of high order reflections peaks did not allow a clear assessment of the morphological structure of the copolymers. This information was inferred by combining the results obtained by SAXS and 1H NMR spin diffusion experiments, which also provided an estimation of the size of the dispersed phases of the nanostructured copolymers. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SAXS, NMR, ABA triblock copolymers, block copolymers
in
Journal of Polymer Science. Part B, Polymer Physics
volume
48
issue
1
pages
55 - 64
publisher
John Wiley & Sons
external identifiers
  • scopus:73349094703
ISSN
0887-6266
DOI
10.1002/polb.21843
language
English
LU publication?
yes
id
b075764c-3e21-4c9e-9efc-3fcbd807a0cb (old id 1515480)
date added to LUP
2009-12-15 07:51:44
date last changed
2018-05-29 09:53:27
@article{b075764c-3e21-4c9e-9efc-3fcbd807a0cb,
  abstract     = {The microphase structure of a series of polystyrene-b-polyethylene oxide-b-polystyrene (SEOS) triblock copolymers with different compositions and molecular weights has been studied by solid-state NMR, DSC, wide and small angle X-ray scattering (WAXS and SAXS). WAXS and DSC measurements were used to detect the presence of crystalline domains of polyethylene-oxide (PEO) blocks at room temperature as a function of the copolymer chemical composition. Furthermore, DSC experiments allowed the determination of the melting temperatures of the crystalline part of the PEO blocks. SAXS measurements, performed above and below the melting temperature of the PEO blocks, revealed the formation of periodic structures, but the absence or the weakness of high order reflections peaks did not allow a clear assessment of the morphological structure of the copolymers. This information was inferred by combining the results obtained by SAXS and 1H NMR spin diffusion experiments, which also provided an estimation of the size of the dispersed phases of the nanostructured copolymers.},
  author       = {Bonk, Fábio A. and Caldarelli, Stefano and Phan, Trang and Bertin, Denis and de Azevedo, Eduardo and Mantovani, Gerson L. and Bonagamba, Tito J. and Plivelic, Tomás and Torriani, Iris C.},
  issn         = {0887-6266},
  keyword      = {SAXS,NMR,ABA triblock copolymers,block copolymers},
  language     = {eng},
  number       = {1},
  pages        = {55--64},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Polymer Science. Part B, Polymer Physics},
  title        = {Investigation by Combined Solid-State NMR and SAXS Methods of the Morphology and Domain Size in Polystyrene-b-Polyethylene Oxide-b-Polystyrene Triblock Copolymers},
  url          = {http://dx.doi.org/10.1002/polb.21843},
  volume       = {48},
  year         = {2010},
}