Effect of ionic aggregation on ionomer chain dimensions. 1. telechelic polystyrenes

Richard A. Register; Stuart L. Cooper; Pappannan Thiyagarajan; S. Chakrapani; Robert Jérôme

doi:10.1021/ma00213a027

Effect of ionic aggregation on ionomer chain dimensions. 1. telechelic polystyrenes

Richard A. Register, Stuart L. Cooper, Pappannan Thiyagarajan, S. Chakrapani, Robert Jérôme

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Abstract

Carboxy-telechelic polystyrenes with degrees of polymerization of ca. 70 were examined by small-angle neutron scattering in the Na+ ionomer and methyl ester forms to ascertain the effect of ionic aggregation on the chain dimensions. The ionomers contain ionic aggregates, as demonstrated by small-angle X-ray scattering. The chain dimensions were found to be identical for the ionomer and ester, in agreement with the predictions of Squires et al. but in disagreement with the theories of Foreman and Dreyfus. Detailed analysis of the data showed that the contacts between the two isotopic types were random, as intended. The data were satisfactorily described by a polydisperse assembly of wormlike chains, with a Kuhn statistical length comparable to that for homopolystyrene.

Original language	English (US)
Pages (from-to)	2978-2983
Number of pages	6
Journal	Macromolecules
Volume	23
Issue number	11
DOIs	https://doi.org/10.1021/ma00213a027
State	Published - 1990
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Effect of ionic aggregation on ionomer chain dimensions. 1. telechelic polystyrenes",

abstract = "Carboxy-telechelic polystyrenes with degrees of polymerization of ca. 70 were examined by small-angle neutron scattering in the Na+ ionomer and methyl ester forms to ascertain the effect of ionic aggregation on the chain dimensions. The ionomers contain ionic aggregates, as demonstrated by small-angle X-ray scattering. The chain dimensions were found to be identical for the ionomer and ester, in agreement with the predictions of Squires et al. but in disagreement with the theories of Foreman and Dreyfus. Detailed analysis of the data showed that the contacts between the two isotopic types were random, as intended. The data were satisfactorily described by a polydisperse assembly of wormlike chains, with a Kuhn statistical length comparable to that for homopolystyrene.",

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pages = "2978--2983",

journal = "Macromolecules",

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TY - JOUR

T1 - Effect of ionic aggregation on ionomer chain dimensions. 1. telechelic polystyrenes

AU - Register, Richard A.

AU - Cooper, Stuart L.

AU - Thiyagarajan, Pappannan

AU - Chakrapani, S.

AU - Jérôme, Robert

PY - 1990

Y1 - 1990

N2 - Carboxy-telechelic polystyrenes with degrees of polymerization of ca. 70 were examined by small-angle neutron scattering in the Na+ ionomer and methyl ester forms to ascertain the effect of ionic aggregation on the chain dimensions. The ionomers contain ionic aggregates, as demonstrated by small-angle X-ray scattering. The chain dimensions were found to be identical for the ionomer and ester, in agreement with the predictions of Squires et al. but in disagreement with the theories of Foreman and Dreyfus. Detailed analysis of the data showed that the contacts between the two isotopic types were random, as intended. The data were satisfactorily described by a polydisperse assembly of wormlike chains, with a Kuhn statistical length comparable to that for homopolystyrene.

AB - Carboxy-telechelic polystyrenes with degrees of polymerization of ca. 70 were examined by small-angle neutron scattering in the Na+ ionomer and methyl ester forms to ascertain the effect of ionic aggregation on the chain dimensions. The ionomers contain ionic aggregates, as demonstrated by small-angle X-ray scattering. The chain dimensions were found to be identical for the ionomer and ester, in agreement with the predictions of Squires et al. but in disagreement with the theories of Foreman and Dreyfus. Detailed analysis of the data showed that the contacts between the two isotopic types were random, as intended. The data were satisfactorily described by a polydisperse assembly of wormlike chains, with a Kuhn statistical length comparable to that for homopolystyrene.

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JO - Macromolecules

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Effect of ionic aggregation on ionomer chain dimensions. 1. telechelic polystyrenes

Abstract

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