Hierarchical Structure of Lattices in Film Formation of Core-Shell Type Polymer Microspheres

Ishizu, Koji; Sugita, Masaru; Kotsubo, Hidefumi; Saito, Reiko

doi:10.1006/jcis.1995.1055

Cited by 31 publications

(13 citation statements)

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“…Thus, the packing pattern of the AB1M without the PS was the FCC. This conclusion agreed with the previous results (10,15). When 10 wt% of the PSH1 was added, the peaks shifted to larger angles.…”

Section: Introductionsupporting

confidence: 94%

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Hierarchical Structure of Lattices in Film Formation of Core-Shell Type Polymer Microspheres

Saito

Masaru

Ishizu

1997

Journal of Colloid and Interface Science

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Section: Introductionsupporting

confidence: 94%

“…Poly(4-vinyl pyridine) coretally confirmed using small-angle X-ray scattering (SAXS) polystyrene shell type microspheres and polystyrene homoin solid state and over C* in benzene (10). Moreover, the polymers (PS) were used in our research.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Structure of Lattices in Film Formation of Core-Shell Type Polymer Microspheres

Saito

Masaru

Ishizu

1997

Journal of Colloid and Interface Science

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“…Subsequent experimental studies found that increasing the number of arms leads to enhanced crystal ordering, 26–28 which was similar to the ordering observed for core-shell microspheres. 29,30 Theoretical studies of star polyelectrolytes have mainly been limited to scaling arguments aimed at modeling the molecular conformation in these complex materials. 19,31 Likos et al achieved a more fundamental understanding of highly branched star polyelectrolytes through the development of a self-consistent effective pair-wise potential to describe the interactions of two polyelectrolyte stars, 32 which allowed him to construct a phase diagram of the different crystal structures that formed with variation of the number of arms and the polymer concentration.…”

Section: Introductionmentioning

confidence: 99%

Solution properties of star polyelectrolytes having a moderate number of arms

Chremos

Douglas

2017

The Journal of Chemical Physics

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We investigate polyelectrolyte stars having a moderate number of arms by molecular dynamics simulations of a coarse-grained model over a range of polyelectrolyte concentrations, where both the counter-ions and solvent are treated explicitly. This class of polymeric materials is found to exhibit rather distinct static and dynamic properties from linear and highly branched star polyelectrolyte solutions emphasized in past studies. Moderately branched polymers are particle-like in many of their properties, while at the same time they exhibit large fluctuations in size and shape as in the case of linear chain polymers. Correspondingly, these fluctuations suppress crystallization at high polymer concentrations, leading apparently to an amorphous rather than crystalline solid state at high polyelectrolyte concentrations. We quantify the onset of this transition by measuring the polymer size and shape fluctuations of our model star polyelectrolytes and the static and dynamic structure factor of these solutions over a wide range of polyelectrolyte concentration. Our findings for star polyelectrolytes are similar to those of polymer-grafted nanoparticles having a moderate grafting density, which is natural given the soft and highly deformable nature of both of these ‘particles’.

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“…Recently, crosslinked core-shell microspheres with small-diameter particles were prepared. [54,55] Film formation of these microspheres was investigated by means of SAXS and TEM.…”

Section: Structural Ordering Of Crosslinked Core-shell Polymer Microsmentioning

confidence: 99%

“…Characteristics of crosslinked core-shell microspheres. [54] CD a) P4VP core D n D w /D n [54] leads to shrinkage with increasing polymer concentration, and the core gravities are shifted to the arrangement of an FCC lattice. Thus, the transition of a C* solution into a continuous film of core-shell polymer microspheres is very similar to that for star-shaped polymers and (AB) n star block copolymers.…”

Section: Structural Ordering Of Crosslinked Core-shell Polymer Microsmentioning

confidence: 99%

Architecture of Polymeric Superstructures Constructed by Mesoscopically Ordered Cubic Lattices

Ishizu

2003

Macromol. Rapid Commun.

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Highly monodisperse crosslinked core‐shell polymer microspheres could be prepared easily by introducing special crosslinking reagents into the segregated core in block copolymer assembly films. The crosslinked core was stabilized sterically by highly branched shell chains in solution. These microspheres moved like pseudo‐latex. The microspheres formed a lattice with a body‐centered cubic (BCC) structure near the overlap threshold (C*). This structure changed to a face‐centered cubic (FCC) lattice in the bulk region of the films. Photofunctionalized core‐shell microspheres were prepared by introducing dithiocarbamate (DC) groups into shell parts by means of polymer reactions, where DC groups could be propagated using vinyl monomers such as methyl methacrylate (MMA) with living radical mechanism. Polymeric superstructure (three microphase‐separated structure) films were constructed by graft copolymerization of MMA initiated with photofunctionalized microspheres such as macroinitiators under UV irradiation, exhibiting self‐coloring due to Bragg diffraction. These materials can be used for the construction of optical devices such as for the fabrication of light modulators. Photograph of a solution of the microsphere in MMA.magnified imagePhotograph of a solution of the microsphere in MMA.

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Hierarchical Structure of Lattices in Film Formation of Core-Shell Type Polymer Microspheres

Cited by 31 publications

References 0 publications

Hierarchical Structure of Lattices in Film Formation of Core-Shell Type Polymer Microspheres

Hierarchical Structure of Lattices in Film Formation of Core-Shell Type Polymer Microspheres

Solution properties of star polyelectrolytes having a moderate number of arms

Architecture of Polymeric Superstructures Constructed by Mesoscopically Ordered Cubic Lattices

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