produced a 75% yield of the ether in 5 h. Results obtained by using related poly (acry1amide) gels are shown in Table I. In general, the apparent activity/gram of polymer showed little sensitivity to the cross-link density but was highly dependent on the length of the N-alkyl chain. The latter appears to be due to the change in amide concentration in the polymer; ie, when N, N-dimethyl-and N,-N-di-n-octylacrylamide (10% cross-linked) gels ...