| Project/Area Number |
63044062
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| Research Category |
Grant-in-Aid for Overseas Scientific Survey.
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | Nagoya University |
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Principal Investigator |
OKADA Masahiko Faculty of Agriculture, Nagoya University, Professor, 農学部, 教授 (20023103)
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| Co-Investigator(Kenkyū-buntansha) |
ホール ヘンリーキングストン ジュニ アリゾナ大学, 化学科, 教授
SUMITOMO Hiroshi Nagoya University, Emeritus Professor, 名誉教授 (70023372)
HALL H.K.Jr. Department of Chemistry, University of Arizona, Professor
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1989: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1988: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Bicyclic Lactone / Bicyclic Lactam / Ring-Opening Polymerization / Polyester / Polyamide / Oligomer / Biodegradability |
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| Research Abstract |
1. Synthesis and Ring-Opening Polymerization of Novel Bicyclic Oxalactams
Two new bicyclic oxalactams, 2-oxa-5-azabicyclo[2.2.2]octan-6-one (2,5-BOL) and 2-oxa-6-aza-bicyclo[2.2.2]octan-5-one (2,6-BOL) were synthesized and their ring-opening polymerizabilities were examined. 2,5-BOL was anionically polymerized to give a polyamide having cis-2,5-linked tetrahydropyran rings in the main chain. 2,6-BOL did not undergo anionic polymerization, and afforded only a dimeric adduct in a low yield. In contrast, 2,6-BOL was easily polymerized with cationic initiators to give oligoethers containing 6-membered lactam rings in the main chain.
2. Synthesis of Polyesters Having Tetrahydropyran Rings in their Main Chains
Three 2,6-dioxabicyclo[2.2.2]octan-3-one derivatives having an ester group at 4-position were newly prepared. These monomers underwent cationic polymerization to produce polyesters having 2,5-linked tetrahydropyran rings in their backbones and the corresponding ester groups as the side chains. These polyesters showed much improved solubilities compared with the parent polyester. Hydrolysis of these polyesters were examined at 30 ﾟC in a buffer solution at pH 7.2.
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