Comparison of clustering in various acrylate ionomers

Kim, Joon‐Seop; Nah, Yeon Hwa; Jarng, Soon-Suck

doi:10.1016/s0032-3861(01)00063-5

Cited by 21 publications

(14 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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: 51%

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

Gotoh

Ohkoshi

Nagura

2004

Polym J

View full text Add to dashboard Cite

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.

show abstract

contrasting

confidence: 51%

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

Gotoh

Ohkoshi

Nagura

2004

Polym J

View full text Add to dashboard Cite

show abstract

“…This is understandable. Since the PEA ionomer is known to be a well‐clustered ionomer,22–24 most of the ionic groups would form multiplets. Thus, the ionic groups are not expected to exist singly on the surface of the ionomer, while the acid groups are able to reside on the surface.…”

Section: Resultsmentioning

confidence: 99%

Hydrophobic recovery behavior of PMMA and PEA ionomers treated with PSII

Song¹,

Kim²,

Han³

et al. 2003

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Abstract:The surfaces of poly(methyl methacrylate) (PMMA)-based and poly(ethyl acrylate) (PEA)-based ionomers were treated either with plasma or with plasma source ion implantation (PSII), and their hydrophobic recovery behavior was studied by measuring water contact angles. It was found that the hydrophobic recovery of the plasmatreated and PSII-treated surfaces of PMMA ionomers was much slower than that of the acid-form copolymers. This was due to the presence of hydrophilic ionic groups on the ionomer surface. In addition, in the case of the PMMA ionomers, a slow hydrophobic recovery behavior for a long period of time was observed. In the case of the PEA ionomer, the water contact angle values were found to be larger than those for the PMMA ionomers. When the contact angle values of the PMMA and PEA ionomers were compared to those of polystyrene (PS) ionomers, it was found that the order of ionomers showing higher angle value at comparable aging time was as follows: PS ionomer Ͼ PEA ionomer Ͼ PMMA ionomer. This was due to the difference in polarity and matrix glass transition temperature of the ionomers.

show abstract

“…Very recently, Kim et al studied the mechanical properties of the ethyl acrylate ionomers using a dynamic mechanical thermal analysis technique. 8 They found that the clustering in the P(EA-coANa) ionomers is comparable to that in highly clustered poly(styrene-co-sodium acrylate) [P(S-co-ANa)] ionomers.…”

Section: Introductionmentioning

confidence: 97%

“…The group of Bazuin also investigated the dielectric, thermal, and mechanical properties of plasticized poly(ethyl acrylate- co -sodium acrylate) [P(EA- co -ANa)] ionomers. , It was found that the P(EA- co -ANa) ionomers, showing a small-angle X-ray scattering (SAXS) peak, are highly clustered materials. Very recently, Kim et al studied the mechanical properties of the ethyl acrylate ionomers using a dynamic mechanical thermal analysis technique . They found that the clustering in the P(EA- co -ANa) ionomers is comparable to that in highly clustered poly(styrene- co -sodium acrylate) [P(S- co -ANa)] ionomers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Low Matrix Glass Transition Temperature on the Cluster Formation of Ionomers Having Two Ion Pairs per Ionic Repeat Unit

Kim

2003

Macromolecules

Self Cite

View full text Add to dashboard Cite

The dynamic mechanical properties and morphology of novel ethyl acrylate ionomers, poly-(ethyl acrylate-co-itaconate) [P(EA-co-ITA)], were investigated. It was found that the P(EA-co-ITA) ionomers showed a well-developed cluster loss tangent peak, which was not seen in poly(styrene-coitaconate) ionomers. This is probably due to the low matrix Tg of the PEA ionomers, which allows ITA units to form a significant number of multiplets, leading to high clustering. The large difference in the matrix and cluster T g's was also observed; this is mainly due to two factors. First, the presence of two ion pairs in an ionic repeat unit makes ion-hopping difficult, resulting in higher cluster Tg. Second, the clustering induced by the low matrix Tg naturally increases the cluster Tg. It was also found that the clustering degree was weaker for the itaconate ionomers than for the acrylate ionomers, which is probably due to the fact that the presence of two ion pairs in one ITA unit is more effective in stiffening polymer chains compared to the case of acrylate ionomers. In an SAXS study, an ionomer peak was observed, and the position of the peak shifted to slightly higher angle with increasing ion content, implying that more multiplets form with increasing ion content.

show abstract

Comparison of clustering in various acrylate ionomers

Cited by 21 publications

References 22 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

Hydrophobic recovery behavior of PMMA and PEA ionomers treated with PSII

Effects of Low Matrix Glass Transition Temperature on the Cluster Formation of Ionomers Having Two Ion Pairs per Ionic Repeat Unit

Contact Info

Product

Resources

About