Physical Properties of Ionic Polymers

Otocka, E. P.

doi:10.1080/15583727108085369

Cited by 101 publications

(8 citation statements)

References 50 publications

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“…As re- ported in the literature, two main reasons are invoked to explain the increase of T g of ionomers: the ionic interactions leading to ion-clustering or physical crosslinks and the introduction of bulky sulfonate groups and from hydrogen bond interaction. As demonstrated previously, 7,16,17 in the case of polymeric samples containing SO 3 Na groups, the contribution from ionic aggregations seems to be negligible, the increment of T g appearing more likely to be the result of internal chain stiffening due to the presence of sulfonate comonomeric units. Therefore, it is highly probable that ion-clustering effects can be ruled out also for the samples under investigation.…”

Section: Resultsmentioning

confidence: 68%

Synthesis and thermal properties of randomly branched poly(butylene isophthalate) containing sodium sulfonate groups

Finelli

Siracusa

Lotti

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:Randomly branched poly(butylene isophthalate) samples containing sodium sulfonate groups were prepared from dimethyl isophthalate, 3,5-bis(carbomethoxycarbonyl) benzene sulfonate, tris(hydroxyethyl) isocyanurate, and 1,4-butanediol, according to the well-known twostage polycondensation procedure. The polymers, containing various amounts of branching units and ionic groups, demonstrated to be soluble in the most common organic solvents, an evidence that gelation was not reached under the polymerization conditions adopted. The thermal behavior was examined by thermogravimetric analysis and differential scanning calorimetry. The sulfonate as well as the branching units had only a limited effect on the thermal stability, which slightly decreased with respect to pure poly(butylene isophthalate). The analysis carried out using DSC technique showed that the T m of the copolymers decreased with increasing counit content, differently from T g , which, on the contrary, increased. Baur's equation was found to describe well the T m -composition data.

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Section: Resultsmentioning

confidence: 68%

Synthesis and thermal properties of randomly branched poly(butylene isophthalate) containing sodium sulfonate groups

Finelli

Siracusa

Lotti

et al. 2005

J of Applied Polymer Sci

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“…A higher degree of crosslinks in the membrane means a higher barrier to the plastic flow. The conclusion can be drawn that CGG introduced to PAA matrix has considerably improved the mechanical properties of the membranes, and the enhancement of tensile strength may be due to ionic interaction between CGG and PAA molecules, which gives rise to a network like structure and ionic aggregation [27,28].…”

Section: Mechanical Properties Of the Membranesmentioning

confidence: 95%

Thermal and mechanical properties of cationic guar gum/poly(acrylic acid) hydrogel membranes

Huang

Lü

Xiao

2007

Polymer Degradation and Stability

104

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“…Other elastomeric systems containing carboxylate groups have also been studied (7)(8)(9)(10). Broze et al have recently reported the properties of telechelic carboxy-terminated polybutadiene-based ionomers.…”

Section: Introductionmentioning

confidence: 99%

New polyisobutylene‐based model elastomeric ionomers: RheoLogical behavior

Bagrodia

Wilkes

Kennedy

1986

Polymer Engineering & Sci

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The rheological behavior of sulfonated polyisobutylene based elastomeric ionomers has been studied. The effects of molecular architecture, type of cation, and addition of excess neutralization agent were investigated. The effect of temperature was studied to a limited extent. In a specific case, the influence of an ionic plasticizer, zinc stearate was also examined. It was found that in these telechelic ionomers where the ionic groups are located exclusively at the chain ends, significant Ionic interactions may persist even at 180°C. The zinc‐neutralized ionomers had the lowest viscosity as compared to the corresponding potassium‐ or calcium‐neutralized ionomers. The covalent character of zinc is believed responsible for this behavior. Other factors being constant, the triarm based ionomers are more viscous than the monofunctional ionomers. A mixture of monofunctional ionomers with the triarm, species is a model for dangling chain ends, and results in a slight lowering of the viscosity under the conditions studied. Zinc stearate acts as an ionic plasticizer. Upon the addition of 15 percent by weight of zinc‐stearate to the ionomer, the low shear rate viscosity drops by several orders of magnitude and renders the ionomer thermally processable at moderate temperatures.

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Physical Properties of Ionic Polymers

Cited by 101 publications

References 50 publications

Synthesis and thermal properties of randomly branched poly(butylene isophthalate) containing sodium sulfonate groups

Synthesis and thermal properties of randomly branched poly(butylene isophthalate) containing sodium sulfonate groups

Thermal and mechanical properties of cationic guar gum/poly(acrylic acid) hydrogel membranes

New polyisobutylene‐based model elastomeric ionomers: RheoLogical behavior

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