Effect of ring size on the cationic ring-opening polymerization of cyclic sulfites
β Scribed by Natsuhiro Azuma; Fumio Sanda; Toshikazu Takata; Takeshi Endo
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 380 KB
- Volume
- 199
- Category
- Article
- ISSN
- 1022-1352
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π SIMILAR VOLUMES
Cationic copolymerization of seven-membered cyclic sulfite, 1,3,2-dioxathiepane-2-oxide ( 1) and oxetane ( 2) in one-shot feeding was carried out to obtain the corresponding copolymer. When a mixture of equimolar amount of 1 and 2 reacted at 0ΠC in the presence of methyl trifluoromethanesulfonate (T
Ring-opening reactions of 1,3-dioxepan-2-one (1) and 1,3-dioxan-2-one (2) with several alcohols were examined. The reactions proceeded without trifluoroacetic acid (TFA) in low conversions, while they proceeded smoothly with TFA to afford the ring-opened adducts and oligomers. Ring-opening polymeriz