Ionomer Model Systems — Synthesis-Characterization-Rheology

Stadler, Reimund; Möller, Martin; Omeis, Jürgen; Burgert, Josef; Freitas, L. L.

doi:10.1007/978-94-009-1361-5_13

Cited by 4 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[77] = lim (7,ip/C) = 2.5/p (7) c-0 Equation 7shows that the intrinsic viscosity is inversely proportional to the density of the sphere. Therefore, the decreasing intrinsic viscosity as the ionic segment length increases could be related to an increase in micelle density as the aggregation number increases.…”

Section: Resultsmentioning

confidence: 99%

“…It was observed that for a constant arm molecular weight, the intrinsic viscosity was nearly independent of the number of arms.44'45 However, this conclusion applies to stars having ca. [4][5][6][7][8][9][10][11][12][13][14][15] arms, while the aggregation numbers for the micelles range from 3 to over 100 chains. 3.5.3. Molecular Weights.…”

Section: Resultsmentioning

confidence: 99%

“…Reverse micelles of a series of polystyrene-poly(2-vinylpyridinium hydrochloric acid) diblock ionomers were briefly described. 7 In this study, the apparent molecular weight of the micelles was determined by light scattering. The aggregation number was found to increase as the length of the ionic segment increases.…”

Section: Introductionmentioning

confidence: 99%

“…10-12, whereas aggregation numbers of ca. [50][51][52][53][54][55][56][57][58][59][60] were observed for chains with longer ionic segments (4)(5)(6)(7)(8)(9) repeat units).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Colloidal properties of block ionomers. 1. Characterization of reverse micelles of styrene-b-metal methacrylate diblocks by size-exclusion chromatography

Desjardins¹,

Eisenberg²

1991

Macromolecules

View full text Add to dashboard Cite

The colloidal properties of polystyrene-6-poly(metal methacrylate) AB diblock ionomers are studied by size-exclusion chromatography (SEC). In solvents selectively good for the polystyrene blocks, the ionomers form species that show the characteristics of reverse micelles and that are very stable in solution. This high stability allows the use of SEC for the complete characterization of this micellelike system. SEC experiments show that there is no apparent micelle dissociation-association equilibrium taking place within the time scale of a few days. By combining intrinsic viscosity and SEC measurements, molecular weights, molecular weight distributions, aggregation numbers, and hydrodynamic radii of the micelles have been determined. The effects on these parameters of varying the lengths of the polystyrene or the ionic blocks are investigated systematically. The presence of spherical micelles is confirmed by electron microscopy. For some of the systems, the aggregation numbers are compared with those determined by small-angle X-ray scattering in the solid state.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…10-12, whereas aggregation numbers of ca. [50][51][52][53][54][55][56][57][58][59][60] were observed for chains with longer ionic segments (4)(5)(6)(7)(8)(9) repeat units).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Colloidal properties of block ionomers. 1. Characterization of reverse micelles of styrene-b-metal methacrylate diblocks by size-exclusion chromatography

Desjardins¹,

Eisenberg²

1991

Macromolecules

View full text Add to dashboard Cite

show abstract

“…The P(S-4VP) polymers of this investigation are examples of block ionomers, a category that has received much attention in these laboratories [4,5] and elsewhere [6,7]. Anionic polymerization is the favored method for the synthesis of block co-polymers, particularly when the objective is close control over polymer architecture, molecular weight, and molecular weight distribution [8].…”

Section: Methodsmentioning

confidence: 99%

Surface properties of some styrene/vinyl pyridine diblock co-polymers

Bosse

Eisenberg

Kindi

et al. 1992

Journal of Adhesion Science and Technology

View full text Add to dashboard Cite

Surface and interaction characteristics of styrene-4 vinyl pyridine (S-4VP) diblock copolymers have been investigated by the method of inverse gas chromatography. Both constituents of the diblock were found to be basic, the 4VP moiety being the stronger base. When adsorbed onto a standard chromatographic support (Chromosorb), a mildly acidic surface, the 4VP block is preferentially oriented to the substrate, leaving an air interphase which is enriched in polystyrene (PS). The surface enrichment by PS is furthered by the lower surface energy of the PS block. Thus, when adsorbed on acidic surfaces, the wettability and related surface properties of P(S-4VP) diblocks will resemble those of PS, in keeping with the observed compositional heterogeneities.

show abstract

IGC study of surface properties of adsorbed styrene/methacrylic acid diblock polymers

Bosse

Eisenberg

et al. 1994

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISAn inverse gas chromatographic study has been carried out on a styrene/methacrylic acid diblock polymer adsorbed on particulates of varying acid/base interaction potential. Acid/ base interactions between polymer and substrate were shown to result in the selective adsorption of copolymer moieties, leading to interphase surface compositions that varied with thickness. At higher interphase thicknesses, bulk and surface compositions became similar; however, depending on the interaction potential of the adsorbent, the interphase thicknesses at this point varied from 100 to 1000 A. Adsorbed diblock interphases are to be considered nonisotropic in local composition and molecular conformation. These properties may make possible designing diblock interphases to meet specific compatibilization requirements in polymer composites.

show abstract

Ionomer Model Systems — Synthesis-Characterization-Rheology

Cited by 4 publications

References 3 publications

Colloidal properties of block ionomers. 1. Characterization of reverse micelles of styrene-b-metal methacrylate diblocks by size-exclusion chromatography

Colloidal properties of block ionomers. 1. Characterization of reverse micelles of styrene-b-metal methacrylate diblocks by size-exclusion chromatography

Surface properties of some styrene/vinyl pyridine diblock co-polymers

IGC study of surface properties of adsorbed styrene/methacrylic acid diblock polymers

Contact Info

Product

Resources

About