2004 Fiscal Year Final Research Report Summary
Synthesis of Polypropellanes via Ring-Opening Polymerization or Coupling Reaction
| Project/Area Number |
14550833
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
高分子合成
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
ISHIZONE Takashi Tokyo Institute of Technology, Department of Organic and Polymeric Materials, Associate Professor, 大学院・理工学研究科, 助教授 (60212883)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Propellane / Ring-opening polymerization / 1,3-Dehydroadamantane / Poly(1,3-adamantane) / Cationic polymerization / Alternating copolymerization / Ring strain / Coupling reaction |
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| Research Abstract |
Cationic ring-opening polymerizations of [3.3.1]propellane derivatives, 1,3-dehydroadamantane (1)and 5-butyl-1,3-dehydroadamantane (2), were carried out with CF_3SO_3H in CH_2Cl_2 at 0℃ for 6-42 h. The central σ-bonds in 1 and 2 were exclusively opened to afford novel poly([3.3.1]propellane)s, poly(1,3-adamantane)s, in good to quantitative yields. The resulting poly(2)possessing flexible butyl substituent was soluble in chloroform, THF, and 1,2-dichlorobenzene, and the degree of polymerization was estimated to be greater than 30, while the poly(1)was hardly soluble in the common organic solvents. All aliphatic poly(1)and poly(2)showed high thermal stability, whose 10% weight loss temperatures were 421 and 486℃, respectively.
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Research Products
(17 results)
