Self-assembly of block copolymer-based ionic supramolecules based upon multi-tail amphiphiles
(2015) In RSC Advances 5(39). p.31091-31103- Abstract
- Utilising simple acid-base titration chemistry, a new family of Linear-b-Amphiphilic Comb (L-b-AC) ionic supramolecules [Soft Matter 2013, 9, 1540-1555] featuring multi-tail side-chains have been synthesized and examined by synchrotron SAXS. To three different parent diblock copolymers of poly(styrene)-b-poly( methacrylic acid) PS-b-PMAA multi-tail ammonium side-chains of (C8)(2)-, (C8)(4) -or (C12)(2)-type were attached at various side-chain grafting densities (X), making it possible to separate effects of the details of the AC-block architecture from effects of the overall volume fraction of the AC block. The micro-segregated morphologies of these systems include AC-block filled spherical microdomains in a liquid-like state (SPHLL),... (More)
- Utilising simple acid-base titration chemistry, a new family of Linear-b-Amphiphilic Comb (L-b-AC) ionic supramolecules [Soft Matter 2013, 9, 1540-1555] featuring multi-tail side-chains have been synthesized and examined by synchrotron SAXS. To three different parent diblock copolymers of poly(styrene)-b-poly( methacrylic acid) PS-b-PMAA multi-tail ammonium side-chains of (C8)(2)-, (C8)(4) -or (C12)(2)-type were attached at various side-chain grafting densities (X), making it possible to separate effects of the details of the AC-block architecture from effects of the overall volume fraction of the AC block. The micro-segregated morphologies of these systems include AC-block filled spherical microdomains in a liquid-like state (SPHLL), AC-block filled hexagonally-packed cylinders (CYL), alternating lamellar microlayers of AC- and L-blocks (LAM) and L-block filled hexagonally-packed cylinders (CYL*). For systems with the same parent diblock copolymer that also carry a constant volume fraction of AC-blocks, an increase in the side-chain length (l(sc)) and/or in the number of alkyl tails at a side-chain branch point (m) result in a microdomain morphology that is either unchanged or changed into one with a less curved interface. For lamellae-forming L-b-AC ionic supramolecules made up of the same parent diblock copolymer, a body of experimental data showing small variations in the repeat distance of the LAM micro-segregated structure (d(LAM)) could be obtained by making appropriate combinations of X, lsc and m. For such lamellae-forming L-b-AC ionic supramolecules, the average of d(LAM) values decreases when l(sc) and/or m increase. For systems with (C12)(2)-type side-chains, the effective Flory-Huggins interaction parameter between L-and AC-blocks chi'(C12)(2)/X was determined at various side-chain grafting densities and it was observed that chi'(C12)(2)/X increases when X is increased. (Less)
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https://lup.lub.lu.se/record/5401180
- author
- Asad Ayoubi, Mehran LU ; Almdal, K. ; Zhu, K. ; Nystrom, B. ; Olsson, Ulf LU and Piculell, Lennart LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- RSC Advances
- volume
- 5
- issue
- 39
- pages
- 31091 - 31103
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000352791300084
- scopus:84926665149
- ISSN
- 2046-2069
- DOI
- 10.1039/c5ra03220b
- language
- English
- LU publication?
- yes
- id
- e6cfc1da-daa5-4591-b3cd-7eff557365d3 (old id 5401180)
- date added to LUP
- 2016-04-01 13:23:07
- date last changed
- 2022-04-14 00:52:34
@article{e6cfc1da-daa5-4591-b3cd-7eff557365d3,
abstract = {{Utilising simple acid-base titration chemistry, a new family of Linear-b-Amphiphilic Comb (L-b-AC) ionic supramolecules [Soft Matter 2013, 9, 1540-1555] featuring multi-tail side-chains have been synthesized and examined by synchrotron SAXS. To three different parent diblock copolymers of poly(styrene)-b-poly( methacrylic acid) PS-b-PMAA multi-tail ammonium side-chains of (C8)(2)-, (C8)(4) -or (C12)(2)-type were attached at various side-chain grafting densities (X), making it possible to separate effects of the details of the AC-block architecture from effects of the overall volume fraction of the AC block. The micro-segregated morphologies of these systems include AC-block filled spherical microdomains in a liquid-like state (SPHLL), AC-block filled hexagonally-packed cylinders (CYL), alternating lamellar microlayers of AC- and L-blocks (LAM) and L-block filled hexagonally-packed cylinders (CYL*). For systems with the same parent diblock copolymer that also carry a constant volume fraction of AC-blocks, an increase in the side-chain length (l(sc)) and/or in the number of alkyl tails at a side-chain branch point (m) result in a microdomain morphology that is either unchanged or changed into one with a less curved interface. For lamellae-forming L-b-AC ionic supramolecules made up of the same parent diblock copolymer, a body of experimental data showing small variations in the repeat distance of the LAM micro-segregated structure (d(LAM)) could be obtained by making appropriate combinations of X, lsc and m. For such lamellae-forming L-b-AC ionic supramolecules, the average of d(LAM) values decreases when l(sc) and/or m increase. For systems with (C12)(2)-type side-chains, the effective Flory-Huggins interaction parameter between L-and AC-blocks chi'(C12)(2)/X was determined at various side-chain grafting densities and it was observed that chi'(C12)(2)/X increases when X is increased.}},
author = {{Asad Ayoubi, Mehran and Almdal, K. and Zhu, K. and Nystrom, B. and Olsson, Ulf and Piculell, Lennart}},
issn = {{2046-2069}},
language = {{eng}},
number = {{39}},
pages = {{31091--31103}},
publisher = {{Royal Society of Chemistry}},
series = {{RSC Advances}},
title = {{Self-assembly of block copolymer-based ionic supramolecules based upon multi-tail amphiphiles}},
url = {{http://dx.doi.org/10.1039/c5ra03220b}},
doi = {{10.1039/c5ra03220b}},
volume = {{5}},
year = {{2015}},
}