1988 Fiscal Year Final Research Report Summary
SYNTHESIS AND PROPERTIES OF MACROMOLECULAR SURFACTANTS
| Project/Area Number |
62470080
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
有機工業化学
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
YAMASHITA Yuya NAGOYA UNIVERSITY, 工学部, 教授 (10022980)
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| Co-Investigator(Kenkyū-buntansha) |
TSUKAHARA Yasuhisa NAGOYA UNIVERSITY, 工学部, 助手 (20135312)
KAWAKAMI Yuhsuke NAGOYA UNIVERSITY, 工学部, 助教授 (80109280)
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| Project Period (FY) |
1987 – 1988
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| Keywords | Surface active agent / Graft copolymer / Macromonomer / Hydrogel / ミセル |
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| Research Abstract |
Amphiphilic graft copolymers are effective as macromolecular surfactants and can be synthesized by the macromonomer method. The polymerization behavior of the macromonomer was studied in order to prepare well-defined comb graft copolymers with narrow molecular weight distribution and narrow composition distribution. In the case of homopolymerization macromonomers, termination reaction becomes diffusion controlled to attain high molecular weight as high as one million from the onset of the polymerization. In the case of copolymerization, phase separation of different copolymer chain leads to decreased reactivity macromonomers and special care seems necessary for the selection of the solvent for the copolymerization. Studies on the surface activity of comb graft copolymers were carried out by observing the transmission electronmicrogram of the surface structure and microdomain structure with phase separation was confirmed to prove the correctness of the surface segregation mechanism. Water soluble graft copolymers were prepared to study the micelle formation and surface adsorption and solution properties were measured. The results of the viscosity measurement of the aqueous solution of the graft copolymers coosisting of hydrophobic alkyl methacrylate branch and hydrophilic methacrylic acid backbone were compares with that of the random copolymer with the same molecular weight and composition and shown to have ten times larger viscosity. Micelle formation was suggested solubilization of oil soluble dyes has proved the association by hydrophobic bond. Aggregation of hydrophobic side chain occurs in the formation of hydrogels from hydrophilic graft copolymers. By casting a graft copolymer prepared from the polystyrene macromonomer yields transparent films swellable in water.
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