Polydimethylsiloxane-based telechelic ionomers: Synthesis and properties in solutionстатья

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[1] Polydimethylsiloxane-based telechelic ionomers: Synthesis and properties in solution / I. Blagodatskikh, O. I. Shchegolikhina, T. A. Larina et al. // VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A & SERIYA B. — 1996. — Vol. 38, no. 11. — P. 1876–1880. Lithium and zinc carboxylate-terminated telechelic oligodimethylsiloxanes with chain lengths of n = 10-120 units were prepared. It was shown that neutralization of carboxy-terminated oligomers with LiOH almost does not affect their molecular mass distribution, whereas neutralization of these oligomers with Zn(CH3COO)(2), in some cases, leads to products with a doubled molecular mass. Closed association was observed in dilute solutions of lithium carboxylate telechelics in toluene. This observation suggests that the system lies near the critical micelle concentration. Secondary association of micellar solutions, which leads to phase separation, was also observed. Solutions of zinc carboxylate telechelics did not undergo phase separation or gelation; the micelles observed in a solution of one of the samples were stable in time.

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