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Influence of droplet properties on the formation of microemulsion-ABA-triblock copolymer networks

Sarraguca, Jorge M. G.; Pais, Alberto A. C. C. and Linse, Per LU (2009) In Soft Matter 5(1). p.140-147
Abstract
Structural equilibrium properties of transient networks formed by microemulsion droplets and ABA triblock copolymers in solution have been studied by Monte Carlo simulation. The droplets were represented by soft spheres and the polymers by junctions connected by harmonic bonds with an angular potential regulating the intrinsic chain stiffness. The interaction parameters were selected such that the end A-blocks were localized inside the droplets and the middle B-block in the continuous phase. The influence of (i) the droplet volume fraction, (ii) the droplet radius, and (iii) the contour length of the middle B-block on the formation and the structure of the microemulsion-polymer network at three-fold excess of the polymers were investigated... (More)
Structural equilibrium properties of transient networks formed by microemulsion droplets and ABA triblock copolymers in solution have been studied by Monte Carlo simulation. The droplets were represented by soft spheres and the polymers by junctions connected by harmonic bonds with an angular potential regulating the intrinsic chain stiffness. The interaction parameters were selected such that the end A-blocks were localized inside the droplets and the middle B-block in the continuous phase. The influence of (i) the droplet volume fraction, (ii) the droplet radius, and (iii) the contour length of the middle B-block on the formation and the structure of the microemulsion-polymer network at three-fold excess of the polymers were investigated by using polymer end-to-end separation probability distribution functions, droplet radial distribution functions, and network connectivity indicators. A universal behavior of the properties investigated was found when examining the results versus the length ratio of the polymer end-to-end separation and the surface-to-surface separation between neighboring droplets for a hypothetical homogeneous droplet distribution. At a length ratio of 0.5, few polymer bridges between droplets were established and only clusters with a small number of droplets were found. However at a length ratio of ca. 1.5 a connected network was formed and most of the polymers formed bridges between two droplets. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Soft Matter
volume
5
issue
1
pages
140 - 147
publisher
Royal Society of Chemistry
external identifiers
  • wos:000263272100018
  • scopus:57849146100
ISSN
1744-6848
DOI
10.1039/b809459d
language
English
LU publication?
yes
id
a28c9d2d-bc59-449c-8589-f8daf1e0c1e3 (old id 1372686)
date added to LUP
2009-05-08 14:52:24
date last changed
2017-01-01 06:08:37
@article{a28c9d2d-bc59-449c-8589-f8daf1e0c1e3,
  abstract     = {Structural equilibrium properties of transient networks formed by microemulsion droplets and ABA triblock copolymers in solution have been studied by Monte Carlo simulation. The droplets were represented by soft spheres and the polymers by junctions connected by harmonic bonds with an angular potential regulating the intrinsic chain stiffness. The interaction parameters were selected such that the end A-blocks were localized inside the droplets and the middle B-block in the continuous phase. The influence of (i) the droplet volume fraction, (ii) the droplet radius, and (iii) the contour length of the middle B-block on the formation and the structure of the microemulsion-polymer network at three-fold excess of the polymers were investigated by using polymer end-to-end separation probability distribution functions, droplet radial distribution functions, and network connectivity indicators. A universal behavior of the properties investigated was found when examining the results versus the length ratio of the polymer end-to-end separation and the surface-to-surface separation between neighboring droplets for a hypothetical homogeneous droplet distribution. At a length ratio of 0.5, few polymer bridges between droplets were established and only clusters with a small number of droplets were found. However at a length ratio of ca. 1.5 a connected network was formed and most of the polymers formed bridges between two droplets.},
  author       = {Sarraguca, Jorge M. G. and Pais, Alberto A. C. C. and Linse, Per},
  issn         = {1744-6848},
  language     = {eng},
  number       = {1},
  pages        = {140--147},
  publisher    = {Royal Society of Chemistry},
  series       = {Soft Matter},
  title        = {Influence of droplet properties on the formation of microemulsion-ABA-triblock copolymer networks},
  url          = {http://dx.doi.org/10.1039/b809459d},
  volume       = {5},
  year         = {2009},
}