Abstract
7-Methyl-2-phenyl-1,4,6-trioxaspiro[4,5]dec-7-ene (1) and 7-methyl-2-phenyl-1,3,6-trioxaspiro[4,5]dec-7-ene (2) were prepared by [4+2] Diels-Alder reaction in a Parr-reactor. While monomer 1 polymerized only via opening of pyran ring, monomer 2 which has the oxygen atoms properly positioned to facilitate the double ring-opening underwent cationic polymerication with mainly double ring opening. Volume expansion (6.7%) was observed in polymerization of monomer 2.
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Cho, I., Lee, Sk. Syntheses and Ring-Opening Polymerizations of 7-Methyl-2-phenyl-1,4,6-trioxaspiro[4,5]dec-7-ene and 7-Methyl-2-phenyl-1,3,6-trioxaspiro[4,5]dec-7-ene. Polym J 25, 1187–1191 (1993). https://doi.org/10.1295/polymj.25.1187
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DOI: https://doi.org/10.1295/polymj.25.1187