Study on the radical polymerization behavior of macromonomers

Tsukahara, Yasuhisa; Mizuno, Kazuhiko; Segawa, Atsushi; Yamashita, Yuya

doi:10.1021/ma00194a007

Cited by 205 publications

(148 citation statements)

References 13 publications

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“…Solution viscosities can be very high at moderate macromonomer concentrations due to the high molecular weight of the macromonomers, and therefore highly active catalysts are needed to achieve significant conversion and control over molecular weight. Early studies implemented free radical polymerization, but macromonomer conversion was low (30 -80%) 6,[24][25][26] . A series of bottlebrush polymers were produced using this technique and studied in solution [27][28][29][30][31] .…”

Section: Synthesis Of Bottlebrush Polymersmentioning

confidence: 99%

Structure, function, self-assembly, and applications of bottlebrush copolymers

et al. 2015

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Bottlebrush polymers are a type of branched or graft polymer with polymeric side-chains attached to a linear backbone, and the unusual architecture of bottlebrushes provides a number of unique and potentially useful properties. These include a high entanglement molecular weight, enabling rapid self-assembly of bottlebrush block copolymers into large domain structures, the self-assembly of bottlebrush block copolymer micelles in a selective solvent even at very low dilutions, and the functionalization of bottlebrush side-chains for recognition, imaging, or drug 2 delivery in aqueous environments. This review article focuses on recent developments in the field of bottlebrush polymers with an emphasis on applications of bottlebrush copolymers.Bottlebrush copolymers contain two (or more) different types of polymeric side-chains. Recent work has explored the diverse properties and functions of bottlebrush polymers and copolymers in solutions, films, and melts, and applications explored include photonic materials, bottlebrush films for lithographic patterning, drug delivery, and tumor detection and imaging. We provide a brief introduction to bottlebrush synthesis and physical properties and then discuss work related to: i) bottlebrush self-assembly in melts and bulk thin films, ii) bottlebrushes for photonics and lithography, iii) bottlebrushes for small molecule encapsulation and delivery in solution, and iv) bottlebrush micelles and assemblies in solution. We briefly discuss three potential areas for future research, including developing a more quantitative model of bottlebrush self-assembly in the bulk, studying the properties of bottlebrushes at interfaces, and investigating the solution assembly of bottlebrush copolymers.

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Section: Synthesis Of Bottlebrush Polymersmentioning

confidence: 99%

Structure, function, self-assembly, and applications of bottlebrush copolymers

et al. 2015

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“…A porous substrate lined with polymer brush has also been proposed for modulation of flow-through porous media. 8,9 The shear response of brushes may also be important to the rheological behavior of hairyrod polymers 10,11 or molecular bottlebrushes: 12,13 these bottlebrush molecules consist of a relatively stiff main chain from which flexible side chains emanate. We predict that these molecules swell when sheared, making the molecule larger in shearing fields.…”

Section: Introductionmentioning

confidence: 99%

Shear Swelling of Polymer Brushes Grafted onto Convex and Concave Surfaces

Sevick

1996

Macromolecules

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The shear response of polymer brushes is explored as a function of grafting surface curvature using the Alexander-deGennes ansatz, where the free ends of the chains are localized at the tip of the brush and all tethered chains in the brush are stretched equally. Brushes adsorbed onto the concave and convex surfaces of a cylinder are found to swell to a maximum of 35% of their nonsheared brush height in good solvent, larger than the predicted maximum shear swelling of planar brushes of the same grafting density. For significantly convex surfaces, increased surface curvature increases the maximum amount of shear swelling. In contrast, brushes grafted onto concave surfaces with the same grafting density show diminished shear swelling as the grafting surface becomes more concave. The shear response of nonplanar brushes is important in a variety of possible applications, including the fabrication of pressure-sensitive microvalves and dynamic membranes and an understanding of the rheological behavior of hairy-rod polymers or molecular bottlebrushes.

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“…To explore the effect of pyrene contents on dispersion behavior of MWCNT in a solvent through π-π interaction between pyrene groups and a surface of MW-CNT, three graft co-polymers with a variety of co-polymerization ratio, poly(MA-PEO1100-co-PyMMA)s, were synthesized by the macromonomer method (Table 1) [25][26][27][28][29]. MWCNTs were dispersed in THF with sonication in the presence of the graft co-polymer.…”

Section: Effect Of Pyrene Content On Mwcnt Dispersion Behaviormentioning

confidence: 99%

Dispersion Behavior of Multi-walled Carbon Nanotubes with Pyrene-Containing Linear and Graft Polymers as Non-covalent Surface Modifiers

Matsuoka

Yamamoto

Adachi

et al. 2010

Designed Monomers and Polymers

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Various effects on dispersion of multi-walled carbon nanotubes (MWCNTs) in organic solvent and in polymer film by means of pyrene-containing polymeric surface modifiers were investigated. Graft surface modifiers of poly(ethylene oxide) and of polystyrene with pyrene groups were synthesized by radical co-polymerization of corresponding macromonomers and a pyrene-containing methacrylate monomer. The effect of pyrene content on MWCNT dispersion was examined in THF with polymers of different unit ratio of macromonomer to pyrene monomer. The effect of the polymer architecture was explored with a linear polymer having a pyrene end-group and graft polymers having pyrene units. As a result, the dispersibility of MWCNT in THF was improved with increasing pyrene content in the graft polymer and was also improved by a branched architecture of the polymeric non-covalent surface modifier. Preparation of a homogeneously MWCNT dispersed polystyrene film was investigated with a pyrene-containing graft polystyrene as a compatibilizer between the polystyrene matrix and MWCNT as well.

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Study on the radical polymerization behavior of macromonomers

Cited by 205 publications

References 13 publications

Structure, function, self-assembly, and applications of bottlebrush copolymers

Structure, function, self-assembly, and applications of bottlebrush copolymers

Shear Swelling of Polymer Brushes Grafted onto Convex and Concave Surfaces

Dispersion Behavior of Multi-walled Carbon Nanotubes with Pyrene-Containing Linear and Graft Polymers as Non-covalent Surface Modifiers

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