Viscoelastic behavior of plasticized sulfonated polystyrene ionomers

Weiß, Robert; Fitzgerald, John J.; Kim, D.

doi:10.1021/ma00005a014

Cited by 73 publications

(44 citation statements)

References 5 publications

(8 reference statements)

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“…A saturation of PEG macromolecules in the homogeneous amorphous mixture has been reached. Similar results were obtained by Weiss et al [26] on glycerol-plasticized SPS ionomers. The authors explained this behavior by the fact that the glycerol molecules, which are immiscible with the PS chains, preferentially interact with ionic domains and are thus responsible for a weakening of the ionic cross-links.…”

Section: Resultssupporting

confidence: 90%

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Correlation between Morphology and Mechanical Properties in Zn‐Neutralized Sulfonated Polystyrene Ionomer/Poly(ethylene glycol) Blends: Contribution of EFTEM

Dalmas¹,

Vonet²,

Randriamahefa³

et al. 2010

Macro Chemistry & Physics

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Relationships between microstructure and mechanical properties in SPS‐Zn/PEG blends are investigated. Ion/dipole interactions induce the miscibility of both blend components for PEG content up to 10 wt.‐% as evidenced by DSC and TEM observations. Elemental mapping by EFTEM was used to investigate the ionic cluster microstructure and the phase structure in the blends. PEG chains do not hinder the formation of ionic multiplets but modify the microstructure of the clusters. Moreover, a PEG‐rich layer is observed in the vicinity of the aggregates surface. As a consequence, no cluster glass transition is observed in DMA experiments for these blend systems and besides, the absence of ionic plateau is assigned to the decrease in the ionic clusters' stability.magnified image

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Section: Resultssupporting

confidence: 90%

“…Nanoscopic spheres are obtained and the formation of anisotropic rods as observed in Figure 2 in the absence of PEG is strongly limited. Weiss et al [26] have also observed by SAXS measurements the presence of ionic aggregates in glycerol-plasticized SPS ionomers.…”

Section: Microstructural Characterizationmentioning

confidence: 91%

Correlation between Morphology and Mechanical Properties in Zn‐Neutralized Sulfonated Polystyrene Ionomer/Poly(ethylene glycol) Blends: Contribution of EFTEM

Dalmas¹,

Vonet²,

Randriamahefa³

et al. 2010

Macro Chemistry & Physics

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“…Many more plasticizer/aggregate pairs fall into the latter category, with glycerol being a common polar plasticizer [87][88][89][90]. To this reviewers' knowledge, certain metal soaps [91][92][93] are the only plasticizers that fall into the former category.…”

Section: Ionomer Synthesismentioning

confidence: 92%

Review and critical analysis of the morphology of random ionomers across many length scales

Grady

2008

Polymer Engineering & Sci

101

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This review presents a description of what is known about ionomer morphology. All papers on ionomer morphology are not included in this review; but all relevant questions about ionomer morphology are posed and answered as completely as possible. The review is critical; that is, reasons are given for morphologies that are deemed to be more or less likely. The review is organized along three length scales: sub-nanometer, nanometer to 10 nm, and greater than 10 nm. Within each length scale, all three phases are considered: crystalline, amorphous, and ionic aggregate. The purity of the three phases, the arrangement of atoms in the three phases, the size and shape of the three phases, and their arrangements in space relative to each other are explored in this review. A model for the shape of aggregates in ionomers that have well-ordered internal environments is presented. This model proposes that aggregates are fundamentally planar, but will ''roll up'' into tubes or other related structures in order to reduce the number of atoms at aggregate edges. This model was developed primarily based on the varied morphologies ionomers have shown in electron micrographs, but is consistent with other indirect measurements of ionomer morphology.

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“…[1][2][3][4][5] Improvements in their rheological and mechanical properties are attributable to a physical crosslinkage effect by thermally reversible molecular interactions, depending on the ionic content and polarity of the base polymer. [6][7][8][9] Recently, Han et al synthesized poly-(butylene succinate)-based ionomers (PBSi's), and confirmed that PBSi with 3 mol-% of ionic groups exhibited enhanced mechanical properties and melt rheological properties because of a physical cross-linkage effect by ion interaction. [9] However, it has been difficult to interpret the properties related to the unspecified crystallization behavior of semi-crystalline PBSi because ionic moieties within the main chain influence the crystallization behavior in a complicated manner.…”

Section: Introductionmentioning

confidence: 99%

Morphology and Crystallization Behavior of Poly(butylene succinate)‐Based Ionomers (PBSi)

Han

Lee

Kim

et al. 2004

Macromol. Rapid Commun.

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Summary: The crystallization behavior of a poly(butylene succinate)‐based ionomer (PBSi) was analyzed by morphological observations and synchrotron small‐angle X‐ray scattering (SAXS) experiments. The spherulitic morphology of PBSi is composed of irregular lamellae propagating outwards from the center with ionic clusters isolated from the crystalline lamellae. Synchrotron radiation SAXS profiles revealed that the re‐crystallization during heating process was effectively retarded with increasing ionic content, suggesting that the presence of ion aggregates affects the extent of diffusion of chains towards crystallization.PBSi‐3 was isothermally crystallized at 85 °C for 30 min (400×). The spherulites of PBSi‐3 showed an irregular ringed pattern without a distinct center of spherulite.imagePBSi‐3 was isothermally crystallized at 85 °C for 30 min (400×). The spherulites of PBSi‐3 showed an irregular ringed pattern without a distinct center of spherulite.

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Viscoelastic behavior of plasticized sulfonated polystyrene ionomers

Cited by 73 publications

References 5 publications

Correlation between Morphology and Mechanical Properties in Zn‐Neutralized Sulfonated Polystyrene Ionomer/Poly(ethylene glycol) Blends: Contribution of EFTEM

Correlation between Morphology and Mechanical Properties in Zn‐Neutralized Sulfonated Polystyrene Ionomer/Poly(ethylene glycol) Blends: Contribution of EFTEM

Review and critical analysis of the morphology of random ionomers across many length scales

Morphology and Crystallization Behavior of Poly(butylene succinate)‐Based Ionomers (PBSi)

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