1995
DOI: 10.1021/ma00123a016
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Small-angle neutron scattering studies of low-polarity telechelic ionomer solutions. 1. Total scattering

Abstract: The overall structure and thermodynamic interactions that take place in low-polarity ionomer solutions have been investigated via the technique of small-angle neutron scattering for two Na-neutralized carboxy-telechelic polystyrene model ionomer systems that differ in the length of the polymer backbone. The strong interchain association that is evidenced in the viscometric measurements of the ionomers compared to the ester forms is apparent in the scattering profiles of the ionomers that show a characteristic… Show more

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Cited by 7 publications
(35 citation statements)
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“…This study focuses on the behavior of halato carboxy−telechelic polystyrene ionomers neutralized with sodium. The telechelic ionomers have been synthesized according to the synthetic procedures described in the first part of this series . The polymers based on either hydrogenous styrene (99%, Aldrich, USA) or styrene- d 8 monomer (98+atom% D, Aldrich, Belgium) were synthesized via anionic polymerization to produce a narrow molecular weight distribution.…”
Section: Methodsmentioning
confidence: 99%
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“…This study focuses on the behavior of halato carboxy−telechelic polystyrene ionomers neutralized with sodium. The telechelic ionomers have been synthesized according to the synthetic procedures described in the first part of this series . The polymers based on either hydrogenous styrene (99%, Aldrich, USA) or styrene- d 8 monomer (98+atom% D, Aldrich, Belgium) were synthesized via anionic polymerization to produce a narrow molecular weight distribution.…”
Section: Methodsmentioning
confidence: 99%
“…The solutions were placed in quartz cells of thickness 2 mm, which was determined based on the known coherent and incoherent atomic cross sections to give sample transmissions within 0.5 to 0.8. , The scattering data from each solution and the solvent were corrected for the scattering from the empty cell and background (using a 6 Li blocked beam), and the corrected scattering from the solvent was subtracted from the corrected solution scattering to obtain the scattering from the polymer alone. The transmission measurements and the corrections for the detector response have been made as described previously . As none of the samples exhibited anisotropy, the scattering data were radially averaged and placed on an absolute scale by measuring the scattering from a 1 mm thickness silica gel standard that has a zero cross section of (d∑/dΩ) (0) = 32 ± 1 cm -1 .…”
Section: Methodsmentioning
confidence: 99%
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“…[1][2][3][4][5][6][7][8][9] Although structures and properties of telechelic ionomers in bulk have been studied extensively, relatively little effort has been made to develop an understanding of their solution behavior. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] Especially, there seems to be no report dealing with the association process of ionomers in a wide concentration range from dilute to concentrated regime.…”
Section: Introductionmentioning
confidence: 99%
“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] It seems well established that telechelic ionomers are aggregated even at very dilute concentration in anhydrous solvent, grow in aggregate size with increasing polymer concentration C and then form weak viscoelastic networks at certain C Ã depending on a kind of metallic ions used followed by development of stronger networks with ion clusters as crosslinking points up to the bulk. Here, adjectives ''weak'' and ''strong'' are only conventionally used to differentiate two networks with that there are large differences in magnitudes of viscosity and plateau modulus characteristic of the viscoelastic network.…”
mentioning
confidence: 99%