Direct Observation of an Isolated Cyclic Sodium Poly(styrenesulfonate) Molecule by Atomic Force Microscopy

Kawaguchi, Daisuke; Nishu, Takashi; Takano, Atsushi; Matsushita, Yushu

doi:10.1295/polymj.pj2006155

Cited by 10 publications

(6 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The enlarged image and schematic representation of c-PSS are shown in Figures 1b and c, respectively. 65 The apparent contour lengths measured for c-PSS molecules ranged between 160 and 210 nm, whereas the length of a fully stretched PSS chain with a corresponding degree of polymerization was calculated to be 270 nm. Hence, the observed length for c-PSS molecules was apparently shorter than the expected one and the apparent length distribution for the molecules…”

Section: Resultsmentioning

confidence: 99%

Direct observation and mutual diffusion of cyclic polymers

Kawaguchi

2013

Polym J

Self Cite

View full text Add to dashboard Cite

A cyclic polymer is one of the ideal model polymers with which to investigate the effects of chain topology on the physical properties of polymers. In this review, I summarize my recent work demonstrating that the chain structure of cyclic polymers can be directly observed by atomic force microscopy (AFM) and that the mutual diffusion of cyclic polymers is faster than that of corresponding linear ones. For direct evidence of the cyclic structure, isolated molecules of cyclic poly(sodium styrenesulfonate), which was derived from cyclic polystyrene, were observed by AFM. The mutual diffusion of cyclic polystyrene/ cyclic deuterated polystyrene was investigated as a function of temperature and molecular weight by dynamic secondary ion mass spectroscopy. For the molecular weight of 113k, the mutual diffusion coefficient of cyclic polystyrene, D C , was approximately twofold larger than that of the corresponding linear polymer, D L , at all temperatures. Under an iso-free volume condition, the D C value was larger than the D L value for all the molecular weights. These results clearly show that the chain topology strongly affects the molecular motion of the whole chain.

show abstract

Section: Resultsmentioning

confidence: 99%

Direct observation and mutual diffusion of cyclic polymers

Kawaguchi

2013

Polym J

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, most of the related studies have only focused on linear PSS and its derivatives, but little attention was paid to the nonlinear structures, such as a well-defined hyperbranched or cyclic structure. Note that Matsushita et al synthesized cyclic PSS through sulfonation of cyclic PS prepared by anionic polymerization-based ring-closure reaction and reported a direct observation of cyclic PSS chains on the surface by atomic force microscopy (AFM) . Star-like PSS homo- and copolymers were also successfully synthesized through sulfonation of the PS precursors prepared by anionic polymerization through an arm-first method. − However, despite the success of some special cases, − these synthetic routes are not promising for other topological systems.…”

mentioning

confidence: 99%

“…Note that Matsushita et al synthesized cyclic PSS through sulfonation of cyclic PS prepared by anionic polymerization-based ring-closure reaction and reported a direct observation of cyclic PSS chains on the surface by atomic force microscopy (AFM) . Star-like PSS homo- and copolymers were also successfully synthesized through sulfonation of the PS precursors prepared by anionic polymerization through an arm-first method. − However, despite the success of some special cases, − these synthetic routes are not promising for other topological systems. Especially, for the star-like PSS system, it is difficult to control the exact number of arms to realize the ideal structure.…”

mentioning

confidence: 99%

Universal Synthetic Strategy for the Construction of Topological Polystyrenesulfonates: The Importance of Linkage Stability during Sulfonation

Hao

Zhang

et al. 2019

ACS Macro Lett.

View full text Add to dashboard Cite

Polystyrenesulfonate (PSS), as one of the most important categories of polyelectrolytes, has received increasing attention due to its great potential in the applications of energy-and biomedical-related fields. However, most of the previous studies only focused on linear PSS and its derivatives, but little attention was paid to nonlinear topological PSSs. So far, the synthesis of nonlinear PSSs with well-defined structures is still a challenging task, and the main obstacle lies in the stability issue of functional chemical linkages during the sulfonation process of polystyrene (PS) precursors, such as the carbon−oxygen-containing linkages. Herein, by rationally designing the chemical structure of the functional linkage, we introduce a versatile and efficient strategy for the preparation of topological PSSs. Specifically, by embedding firm triazole linkages (without carbon−oxygen linkages) into the backbone structure of cyclic and hyperbranched PS precursors, the backbone and functional linkages are found to present excellent chemical stability under certain sulfonation conditions, which eventually lead to the successful preparation of cyclic and hyperbranched PSSs. By using two sets of PSS samples with varied molar masses, the scaling relations between the number of repeating units and the sedimentation coefficient are established for both linear and cyclic PSSs. We believe that our proposed synthetic strategy is universal and could be extended to the synthesis of other types of topological PSSs.

show abstract

“…c-hPS c-dPS l-hPS l-dPS c-hPS/c-dPS (c-hPS, l-hPS) (c-dPS, l-dPS) Table I N 27) c-hPS-109k 28) 95 % LCCC 27) M w c-hPS c-dPS l-hPS l-dPS (T g ) (DSC) l-hPS/l-dPS c-hPS/c-dPS 29,30) Table I. Characteristics of polystyrenes used in this study.…”

unclassified

Interfacial Diffusion Phenomena of Cyclic and Linear Polymers

Kawaguchi

2015

J. Soc. Rheol., Jpn

Self Cite

View full text Add to dashboard Cite

Direct Observation of an Isolated Cyclic Sodium Poly(styrenesulfonate) Molecule by Atomic Force Microscopy

Cited by 10 publications

References 56 publications

Direct observation and mutual diffusion of cyclic polymers

Direct observation and mutual diffusion of cyclic polymers

Universal Synthetic Strategy for the Construction of Topological Polystyrenesulfonates: The Importance of Linkage Stability during Sulfonation

Interfacial Diffusion Phenomena of Cyclic and Linear Polymers

Contact Info

Product

Resources

About