V. R. Ziatdinov, G. Cai, W. P. Weber
Mar 7, 2002
Citations
0
Influential Citations
5
Citations
Journal
Macromolecules
Abstract
2,5,5-Trimethyl-2-trimethylsiloxy-1-oxa-2,5-disilacyclopentane (I), cis- and trans-2,5-dimethyl-2,5-bis(trimethylsiloxy)-1-oxa-2,5-disilacyclopentane (II), and 2-methyl-2,5,5-tris(trimethylsiloxy)-1-oxa-2,5-disilacyclopentane (III) have been prepared from 1,3,5,7-tetramethylcyclotetrasiloxane (D4H) and vinylpentamethyldisiloxane, vinylmethylbis(trimethylsiloxy)silane, and vinyltris(trimethylsiloxy)silane, respectively, by a two-step synthetic process. I, II, and III undergo anionic ring-opening polymerization (AROP) to yield poly[2,2,5-trimethyl-5-trimethylsiloxy-1-oxa-2,5-disila-1,5-pentanylene] (IV), poly[2,5-dimethyl-2,5-bis(trimethylsiloxy)-1-oxa-2,5-disila-1,5-pentanylene] (V), and poly[2-methyl-2,5,5-tris(trimethylsiloxy)-1-oxa-2,5-disila-1,5-pentanylene] (VI), respectively. I−VI have been characterized by 1H, 13C, and 29Si NMR and IR spectroscopy. Polymer microstructures have been determined by 29Si NMR. Molecular weights of I−III have been determined by GC/MS and by high-resolution mass spectromet...