2005 Fiscal Year Final Research Report Summary
Study on the development of resinous-restoration-system without a polymerization contraction.
| Project/Area Number |
15390604
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Fukuoka Dental College |
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Principal Investigator |
MIYAZAKI Koji Fukuoka Dental College, Dept of Dental Engineering, Professor, 歯学部, 教授 (40050041)
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| Co-Investigator(Kenkyū-buntansha) |
ENDO Takeshi Yamagata University, Faculty of Engineering, Dept of Polymer Science, Professor, 工学部, 教授 (40016738)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Gas-solid phase reaction / Oxirane / Cyclic carbonates / Benzyltributylammonium / Block copolymer / Cationic polymerization / Ring-opening polymerization |
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| Research Abstract |
1)The appropriate choice of catalysts and comonomers improved the selectivity of the gas-solid phase reaction of carbon dioxide into copolymers from glycidyl methacrylate, which transforms the pendant oxirane moieties Benzyltributylammonium chloride exhibited good and selective catalytic behavior owing to its appropriate moiety in the copolymer film and moderate catalytic activity. N-Butyl methacrylate proved to be an effective comonomer, resulting in higher incorporation efficiency and better selectivity by preventing the cross-linking reaction, allowing one to obtain soluble polymers bearing cyclic carbonate structure.
2)Pseudo block and triblock copolymers were synthesized by cationic ring-opening copolymerization of 1,5,7,11-tetraoxaspiro[5.5]undecane(SOC1) with trimethylene oxide(OX) via one-shot and two-shot procedures, respectively. When SOC1 and OX were copolymerized cationically using boron trifluoride etherate(BF3OEt2) as an initiator in CH2Cl2 at 25*, OX was consumed faster than SOC1. SOC1 was polymerized from the OX-rich gradient copolymer produced in the initial stage of the copolymerization to afford the corresponding pseudo block copolymer, poly[(OX-grad-SOC1)-b-SOC1]. We also succeeded the synthesis of a pseudo triblock copolymer by the addition of OX during the course of the polymerization of SOC1 before its complete consumption, which provided the corresponding pseudo triblock copolymer, poly[SOC1-b-(OX-grad-SOC1)-b-SOC1].
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Research Products
(3 results)
