EFFECT OF IONIC AGGREGATION ON IONOMER CHAIN DIMENSIONS .1. TELECHELIC POLYSTYRENES

被引：37

作者：

COOPER, SL

THIYAGARAJAN, P

CHAKRAPANI, S

JEROME, R

机构：

[1] UNIV WISCONSIN, DEPT CHEM ENGN, MADISON, WI 53706 USA

[2] ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA

[3] ARGONNE NATL LAB, DIV IPNS, ARGONNE, IL 60439 USA

[4] STATE UNIV LIEGE, MACROMOLEC CHEM & ORGAN CATALYSIS LAB, B-4000 LIEGE, BELGIUM

来源：

MACROMOLECULES | 1990年 / 23卷 / 11期

关键词：

D O I：

10.1021/ma00213a027

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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. © 1990, American Chemical Society. All rights reserved.

引用

页码：2978 / 2983

页数：6

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