Synthesis of Novel Silicon-Containing Amphiphilic Diblock Copolymers and Their Self-Assembly Formation in Solution and at Air/Water Interface

Matsumoto, Kozo; Mizuno, Utako; Matsuoka, Hideki; Yamaoka, H.

doi:10.1021/ma011254n

Cited by 20 publications

(12 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, carbosilane segments (Figure 4( 2 )) containing silicon atoms in the main chain, form crystalline domains if substituted with methyl groups, and highly flexible amorphous domains if longer substituents are present. They exhibit a particular affinity for glass interfaces [160,161].…”

Section: From Polymer Amphiphilicity To Polyphilicitymentioning

confidence: 99%

Polyphilicity—An Extension of the Concept of Amphiphilicity in Polymers

2018

View full text Add to dashboard Cite

Recent developments in synthetic pathways as simple reversible-deactivation radical polymerization (RDRP) techniques and quantitative post-polymerization reactions, most notoriously ‘click’ reactions, leading to segmented copolymers, have broadened the molecular architectures accessible to polymer chemists as a matter of routine. Segments can be blocks, grafted chains, branchings, telechelic end-groups, covalently attached nanoparticles, nanodomains in networks, even sequences of random copolymers, and so on. In this review, we describe the variety of the segmented synthetic copolymers landscape from the point of view of their chemical affinity, or synonymous philicity, in bulk or with their surroundings, such as solvents, permeant gases, and solid surfaces. We focus on recent contributions, current trends, and perspectives regarding polyphilic copolymers, which have, in addition to hydrophilic and lipophilic segments, other philicities, for example, towards solvents, fluorophilic entities, ions, silicones, metals, nanoparticles, and liquid crystalline moieties.

show abstract

Section: From Polymer Amphiphilicity To Polyphilicitymentioning

confidence: 99%

Polyphilicity—An Extension of the Concept of Amphiphilicity in Polymers

2018

View full text Add to dashboard Cite

show abstract

“…For example, we have found a sphere-to-rod transition with increasing hydrophobic chain length 2 and temperaturedependent sphere-disk transition of micelle morphology for two polymer systems. 3,4 What is interesting and important in these systems is the mechanism of transition: a transition occurs by crystallization of hydrophobic polymer chains in the micelle core, while the commonly studied temperature-sensitive micelle transi-tion is due to dehydration of the hydrophilic headgroup. These might be new temperature-sensitive micellar systems.…”

Section: Introductionmentioning

confidence: 99%

Polymer Micelle Formation without Gibbs Monolayer Formation: Synthesis and Characteristic Behavior of an Amphiphilic Diblock Copolymer Having Strong Acid Groups

et al. 2003

Self Cite

View full text Add to dashboard Cite

A novel amphiphilic diblock copolymer having sulfonic acid groups in its hydrophilic chain with poly(diethylsilacyclobutane) as a hydrophobic segment was synthesized by living anionic polymerization followed by treatment with 1,3-propane sultone. The polymer backbone with a degree of polymerization of 18 (hydrophobic):37 (hydrophilic) was synthesized, and three kinds of diblock copolymers with different degrees of sulfonation (R ) 0, 0.50, 0.81) were prepared as sodium salts. The surface tension of aqueous solutions of highly sulfonated polymers as including the R ) 0 (all carboxylic acid) polymer did not decrease with polymer concentration. The solutions did not show foam formation even after vigorous shaking, and almost no adsorption of polymer molecules was observed at the air/water interface by X-ray reflectivity measurement. However, micelle formation with a radius of 140-200 Å was confirmed by dynamic light scattering and small-angle X-ray scattering experiments. Hence, this polymer showed "micelle formation" without "Gibbs monolayer formation" in water. The surface tension decrease in 0.5 M NaCl aqueous solution was also small, but adsorption of polymer was observed by X-ray reflectivity in addition to formation of foam by shaking. The strong ionic character of this novel class of amphiphilic polymer is thought to be the origin of this curious behavior.

show abstract

“…14 The coherent length of X-ray of our apparatus is not clear, but the coherent length seems to be less than 200∼300 nm based on the previous study in which AFM image and X-ray reflectivity data were compared. 15 Hence, summation of these two models would be reasonable. Table II shows the best fitted parameters thus evaluated.…”

Section: Model Fitting Of Tooth-shaped Profilesmentioning

confidence: 99%

X-Ray Reflectometry Confirms Polymer-<I>Grafted</I> Silica Particle Monolayer Formation at the Air–Water Interface

Mouri¹,

Okazaki²,

Yoshinaga³

et al. 2009

J. Nanosci. Nanotech.

Self Cite

View full text Add to dashboard Cite

We examined the air-water interface of the poly(methyl methacrylate)-grafted silica particle monolayer by X-ray reflectometry to obtain in situ information on the particle monolayer structure suggested by pi-A isotherm measurement and SEM observation. We confirmed the monolayer formation of polymethylmethacrylate-grafted silica particle at the air-water interface by interesting XR profile. We obtained XR profile with many tooth-shaped fringes for one of the PMMA-grafted silica particle monolayer. By the model fitting of this profile, we confirmed monolayer formation at the air-water interface. Furthermore, we found that the interface roughness became large at the plateau region in the pi-A isotherm, which provides insight into the origin of the plateau region. We confirmed the reproducibility of XR profiles at same surface pressure after surface compression. This indicates the structually-reversible nature of the particle monolayer, which is the unique nature of the polymer-grafted particle monolayer.

show abstract

Synthesis of Novel Silicon-Containing Amphiphilic Diblock Copolymers and Their Self-Assembly Formation in Solution and at Air/Water Interface

Cited by 20 publications

References 47 publications

Polyphilicity—An Extension of the Concept of Amphiphilicity in Polymers

Polyphilicity—An Extension of the Concept of Amphiphilicity in Polymers

Polymer Micelle Formation without Gibbs Monolayer Formation: Synthesis and Characteristic Behavior of an Amphiphilic Diblock Copolymer Having Strong Acid Groups

X-Ray Reflectometry Confirms Polymer-<I>Grafted</I> Silica Particle Monolayer Formation at the Air–Water Interface

Contact Info

Product

Resources

About