Macromolecules, Vol. 21, No. 8, 1988
2652 Corrections
CORRECTIONS
R. A. Register, M. Foucart, R. JgrBme, Y. S . Ding, and S . L. Cooper*: Structure-Property Relationships in Elastomeric Carboxy-Telechelic Polyisoprene Ionomers Neutralized with Divalent Cations. Volume 21, Number 4, April 1988, p 1009. Some of the values listed in Table I1 are incorrect, particularly those for V , pl, and n, due to errors in the weighting function usecf for desmearing and the scaling factor used for absolute intensity calibration. Table I1 should read as follows: Table I1 Modified Yarusso Model Fit Parameters cation R1,nm Rca, nm V,, nm3 p l , nm-3 Ca2+
Sr2+ Ni2+ Znz+ Cd2+
1.06 1.04 0.95 0.92 0.90
2.01 1.95 2.02 2.10 2.06
262 250 205 194 197
163 139 208 169 185
n 34 33 27 25 26
The ordinate scaling on Figure 5 should be increased by a factor of 10.7. Also, since the zero-strain Young's modulus is three times the a = l intercept of the MooneyRivlin plots, the E values in Table I should be multiplied by three. Since the trends in all the parameters are the same as quoted originally, the Discussion and Conclusions remain unchanged.
