Non-Shrinking Networked Materials from the Cross-Linking Copolymerization of Spiroorthocarbonate with Bifunctional Oxetane
✍ Scribed by Daisuke Nagai; Masaki Nishida; Tomomi Nagasawa; Bungo Ochiai; Koji Miyazaki; Takeshi Endo
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 127 KB
- Volume
- 27
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Summary: The cationic ring‐opening copolymerization behavior of SOC1 with BOXT and the properties of the obtained cross‐linked copolymers are described. SOC1 and BOXT are cationically copolymerized under various feed ratios to obtain the corresponding cross‐linked copolymers in 73–96% yields. The volume change during copolymerization could be controlled by the addition of SOC1 to obtain non‐shrinking or volume‐expanding copolymers. The glass transition temperatures (T~g~) of the copolymers also decrease linearly with the feed ratio of SOC1, which suggests that the introduction of the flexible poly(SOC1) segment into the rigid BOXT cross‐linked segment relieves the internal stress in the resins that severely degrade their mechanical properties.
Cationic copolymerization of SOC1 and BOXT.
magnified imageCationic copolymerization of SOC1 and BOXT.