Relationships between the Glass Transition Temperatures and the Type of Cations in Poly(ethyl acrylate) Ionomers

Kim, Su Hwan; Kim, Joon‐Seop

doi:10.1021/ma021744v

Cited by 40 publications

(24 citation statements)

References 44 publications

(84 reference statements)

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“…The cluster T g can be observed above the matrix T g as a peak in a tan curve and E 0 drops at the corresponding temperature. 19,20 No such second T g peak was detected in this study. Thus, this may imply that the phase-separated structures due to ionic association in P(EA/ AA)-Ti and P(EA/AA)-Zr are different from those of ionomers neutralized with alkaline and alkalineearth metal ions, which needs further study.…”

contrasting

confidence: 52%

Preparation and Viscoelastic Behavior of (Meth)acrylate Ionomers Crosslinked by Titanium(IV), Zirconium(IV) and Niobium(V) Ions

Gotoh

Ohkoshi

Nagura

2004

Polym J

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KEY WORDSIonomer / Titanium / Zirconium / Niobium / Ionomers are crosslinked polymeric materials consisting of a hydrophobic backbone and a small amount of acid groups neutralized by metal cations. Ionomers have been done on a large number of studies, 1-4 having the interesting feature that the structures and properties can be varied by changing the types of counter ions, a constituent of the matrix copolymer, and the degree of neutralization. Crosslinking by metal ions is an effective method for controlling the mechanical properties and enhancing the heat-resistance of the host polymers. However, most investigations on the use of metal ions for crosslinking have dealt with ionomers containing alkali metals or divalent ions such as alkaline earth and transition metals, leaving ionomers containing tetravalent metal ions remain largely uninvestigated. The few examples include halato-telechelic polyisoprenes crosslinked by titanium(IV) (Ti 4þ ) and zirconium(IV) (Zr 4þ ), 5-7 poly(methyl methacrylate-co-methacrylic acid) crosslinked by Ti 4þ and Zr 4þ , 8 and acrylate ionomers dispersions crosslinked by Zr 4þ . 9 In particular, to the best of the authors' knowledge, there has been no study of pentavalent ionomers. In view of this, the authors have begun investigating in detail ionomers with metal ions of high valence.In order to study the physical properties of ionomers containing tetravalent and pentavalent metal ions, poly(ethyl acrylate-co-acrylic acid) crosslinked by Ti 4þ and Zr 4þ , and poly(methyl methacrylate-comethacrylic acid) crosslinked by Niobium(V) (Nb 5þ ) were prepared in this study, and their structures and viscoelastic behavior were investigated. The effect of the kind of metal ion on the mechanical properties and heat-resistance of the host polymer is also discussed.

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contrasting

confidence: 52%

Preparation and Viscoelastic Behavior of (Meth)acrylate Ionomers Crosslinked by Titanium(IV), Zirconium(IV) and Niobium(V) Ions

Gotoh

Ohkoshi

Nagura

2004

Polym J

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“…Assuming no isolated ions allows for the calculation of the number of ions per aggregate, and hence the aggregate size assuming some packing density inside the aggregate. A number of papers have used this sort of analysis to quantify size parameters of aggregates [132,133]. The problem with this approach is the same as with the Yarusso-Cooper approach; in many cases spherical scattering objects are not appropriate.…”

Section: Compression Moldingmentioning

confidence: 99%

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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“…[18][19][20] The aim of this study is to use directly calcium carbonate as received with no further purification and to study both the exfoliation of the filler and the formation of ionic supramolecular structure in the copolymer. [18][19][20] The aim of this study is to use directly calcium carbonate as received with no further purification and to study both the exfoliation of the filler and the formation of ionic supramolecular structure in the copolymer.…”

Section: Introductionmentioning

confidence: 99%

“…All these studies are about ionomers, using exclusively metallic salts with different kind of cations (Na, Ca, Cu, and so on). [18][19][20] The aim of this study is to use directly calcium carbonate as received with no further purification and to study both the exfoliation of the filler and the formation of ionic supramolecular structure in the copolymer. The combination of these two phenomena can lead to interesting properties of the material.…”

Section: Introductionmentioning

confidence: 99%

Ionic nanocomposite networks in poly(styrene‐co‐methacrylic acid) copolymers with calcium carbonate

Chevallier¹,

Ni²,

Vera³

et al. 2012

J of Applied Polymer Sci

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To create reversible supramolecular ionic networks, ionic cross-links were formed from acid pendant functions in poly(styrene-co-methacrylic acid) copolymers by the addition of calcium carbonate. The random dispersion of acid functions in the polystyrene chain is ensured by NMR analysis. The partial reaction of the calcium carbonate with the carboxylic acids is highlighted by a limewater test. The influence of methacrylic acid and calcium-carbonate contents on the formation of an ionic network has been studied through solubility tests. Two main effects were obtained: the exfoliation of the unreacted calcium carbonate characterized by TEM is due to ionic interactions at the surface of nanometric particles that form the first level of organization of the calcium carbonate. Another part of the calcium carbonate reacts with carboxylic acid and is detached from particles to form clusters as shown by x-ray analysis. Finally, by analyzing the dynamic rheological spectrum, the conclusion that the strength of the ionic bonds arises with the calcium content is made. The interest of such an approach with a wide range of observed phenomena in the material is a one-batch process to make thermoreversible nanocomposite networks.

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Relationships between the Glass Transition Temperatures and the Type of Cations in Poly(ethyl acrylate) Ionomers

Cited by 40 publications

References 44 publications

Preparation and Viscoelastic Behavior of (Meth)acrylate Ionomers Crosslinked by Titanium(IV), Zirconium(IV) and Niobium(V) Ions

Preparation and Viscoelastic Behavior of (Meth)acrylate Ionomers Crosslinked by Titanium(IV), Zirconium(IV) and Niobium(V) Ions

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

Ionic nanocomposite networks in poly(styrene‐co‐methacrylic acid) copolymers with calcium carbonate

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