1989 Fiscal Year Final Research Report Summary
Study on Catalytic Behaviors of Polymerized Molecular
| Project/Area Number |
62550644
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性
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| Research Institution | Gunma University |
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Principal Investigator |
ARAI Kenichiro Faculty of Engineering, Gunma University, Assistant Professor, 工学部, 助教授 (50008455)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Sodium 10-Undecenoate / Sodium 8-Nonenoate / Sodium 5-Methyl-3, 7-octadienoate / Sodium 13-Tetradecenoate / Polymerization / UV Light Irradiation / Micelle Formation / Catalytic Activity |
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| Research Abstract |
Polymerization of sodium salt of fatty acids which contained double bond at the chain end, in micelle form under irradiation with UV light, and behaviors of the obtained polymers as surfactant and catalyst were investigated.
1) In the polymerization of sodium 10-undecenoate(UANa), polymer was obtained effectively at the concentrations higher than its precritical micelle concentration(CMC). This result suggests that the formation of micelle accelerated the polymerization. Degree of polymerization(DP) of the obtained polymers were in a range of 10 to 18, and the polymers were found to have stronger hydro- phobicity than the corresponding monomer, UANa.
2) sodium 8-nonenoate(NANa), sodium 5-methyl-3,7-octadienoate(MONa) and sodium 13-tetradecenoate(TANa) were synthesized as homologs of UANA and their polymerization behaviors were investigated. They showed very similar behaviors to UANa, but the former two showed pre-CMC and genuine CMC at the lower concentrations, while the latter showed those at the higher concentrations. DP's of the obtained polymers were about 8, 6, and 20 for NANa, MONa, and TANa, respectively. The values of DP of polyUANa and polyTANa corresponded to aggregation number of UANa and TANa micelles, respectively, estimated from osmotic pressure data. This result may suggest that the molecules in a micelle are polymerized into a polymer molecule.
3) Catalytic activities of polyUANa and sulfonated polyUANa on the hydrolyses of ethyl acetate and p-nitrophenyl acetate was investigated and compared with those of the corresponding lower molecular weight analogs, UANa and sulfonated UANa. The polymers were found to show higher catalytic activities than UANa and sulfonated UANa.
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