Satoyuki Chikaoka, T. Takata, T. Endo
Oct 1, 1990
Citations
0
Influential Citations
10
Citations
Journal
Journal of Polymer Science Part A
Abstract
A spiroorthoester, 2-methyl-1,4,6-trioxaspiro[4.6]undecane (1), was polymerized with aluminium (III) acetylacetonate as a catalyst. The resulting polymer structure was analyzed in detail by FT-IR and 270 MHz 1H NMR, and consisted of poly(orthoester) which was obtained by selective ring-opening of the seven-membered ring. In contrast, 2-methyl-1,4,6-trioxaspiro[4.5]decane (2) and 2-methyl-1,4,6-trioxaspiro[4.4]nonane (3) did not afford any polymers. The reactivity difference of these monomers was discussed in terms of their strain energies on the basis of MM2 calculations.