| Project/Area Number |
04555216
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性・高分子材料（含機械材料）
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| Research Institution | Fukui University |
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Principal Investigator |
SE Kazunori Fukui Univ., Engineering, Associate Prof., 工学部, 助教授 (00154633)
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| Co-Investigator(Kenkyū-buntansha) |
UMEDA Tatsuo Nicca Chem.Co.Ltd., R&D, Researcher., 研究開発部, 研究員
UENO Masanobu Nicca Chem.Co.Ltd., R&D, Section Mana., 研究開発部, 室次長
TOGO Juzaemon Nicca Chem.Co.Ltd., R&D, General Mana., 研究開発部, 部長
TAKAHASHI Toshisada Fukui Univ., Engineering, Prof., 工学部, 教授 (30020184)
梅田 達夫 日華化学(株), 研究開発部, 研究員
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1992: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Four-arms star polymers / Fine preparation / Mass production / Living anionic polymerization / Macromonomer / End-polymerizationalized polymer / alpha-Methylstirene / Equilibrium polymerization / 四本腕星型高分子 / テトラマー(四量体)合成 / ナトリウムミラー / p-イソプロペニルフェネチルクロライド |
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| Research Abstract |
We summarize the results obtained from this project during the first and the second year.
1. Preparation of the end-polymerizationalized polymers (Macromonomer) : alpha-methylstirene was anionically polymerized and the direct coupling reaction of the poly (alpha-methylstylyllithium) with the deactivator was carried out to give the products.
2. Fine preparation of the tetramer for -methylstirene : The monomer reacted with sodium mirror above the ceiling temperature under high vacuum. We found the most appropriate experimental condition of the preparation for the tetramer.
3. Preparation of the four-arms star polymers : Two new techniques of the preparation was developed in this project : the one is carried out in the mixture of the macromonomer and excess sodium mirror, and the other is carried out in the mixture of the radical anion of the macromonomer and the macromonomer without the excess sodium mirror. Many experiments of the preparation using these techniques were performed to give the time conversion curves of the macromonomer to the tetramer and the dimer.
4. The control of the consecutive first-order reaction : It is concluded that the consecutive first-order reaction of the macromonomer proceed in the preparation of the tetramer. So, two rate constsnts of the production of the tetramer and the dissociation of the tetramer were determined from the analysis. From these results, we found the most appropriate condition of the preparation for the four-arms star polymers.
5. Solution properties of the star polymers : The radius of gyration of the star polymer was calculated to clarify the differences in the molecular weights and/or the second virial coefficients of the linear and star polymers.
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