Flower like micellar assemblies in poly(styrene)-block-poly(4-vinylpyridine)/poly(acrylic acid) complexes

Hameed, Nishar, Salim, Nisa V., Parameswaranpillai, Jyotishkumar and Fox, Bronwyn L. 2015, Flower like micellar assemblies in poly(styrene)-block-poly(4-vinylpyridine)/poly(acrylic acid) complexes, Materials letters, vol. 147, pp. 92-96, doi: 10.1016/j.matlet.2015.02.036.

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Title Flower like micellar assemblies in poly(styrene)-block-poly(4-vinylpyridine)/poly(acrylic acid) complexes
Author(s) Hameed, Nishar
Salim, Nisa V.
Parameswaranpillai, Jyotishkumar
Fox, Bronwyn L.
Journal name Materials letters
Volume number 147
Start page 92
End page 96
Total pages 5
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-05-15
ISSN 0167-577X
Keyword(s) Science & Technology
Physical Sciences
Materials Science, Multidisciplinary
Physics, Applied
Materials Science
Block copolymer
Summary The formation of rare flower like micelles in poly(styrene)-block-poly(4-vinyl pyridine)/poly(acrylic acid) (PS-b-P4VP/PAA) diblock copolymer/homopolymer complexes is reported. The self-assembly as well as the morphological changes in the complexes were induced by the addition of a high molecular weight PAA/ethanol solution into the PS-b-P4VP solution in dimethyl formamide followed by dialyses. The composition-dependent micelles were varying in size and shape with increase in PAA concentration in solution. The complex aggregates in solution were characterized by dynamic light scattering (DLS) whereas morphologies in the solid complexes were observed using transmission electron microscopy (TEM). Flower like micelles are formed in complexes at 20 wt% PAA concentration followed by 'spikey' micellar assemblies at 40 wt% PAA. The size of the micelles was found to be increased upon the addition of PAA into the block copolymer solution. Infrared studies revealed the intermolecular hydrogen bonding interactions between the complementary binding sites on PAA and the P4VP block of the block copolymer. Finally, a model was proposed to explain the self-assembly and morphological transitions in these complexes based on the experimental results obtained.
Language eng
DOI 10.1016/j.matlet.2015.02.036
Field of Research 091202 Composite and Hybrid Materials
091209 Polymers and Plastics
09 Engineering
03 Chemical Sciences
Socio Economic Objective 860606 Plastics in Primary Forms
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30075410

Document type: Journal Article
Collection: Institute for Frontier Materials
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