1992 Fiscal Year Final Research Report Summary
Production of Monodisperse Anomalous Polymer Microspheres Having High Light Scattering Ability
| Project/Area Number |
02555185
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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 |
高分子合成
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| Research Institution | Kobe University |
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Principal Investigator |
OKUBO Masayoshi Fac. of Eng., Kobe Univ., Associate Professor, 工学部, 助教授 (30031131)
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| Co-Investigator(Kenkyū-buntansha) |
NISHINO Takahi Fac. of Eng., Kobe Univ., Research Associate, 工学部, 助手 (40180624)
UEDA Yasukiyo Fac. of Eng., Kobe Univ., Associate Professor, 工学部, 助教授 (40116190)
NAKAMAE Katsuhiko Fac. of Eng., Kobe Univ., Professor, 工学部, 教授 (40031075)
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| Project Period (FY) |
1990 – 1992
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| Keywords | Particle / Microsphere / Emulsion Polymerization / Hollow particle / Anomalous particle / Light scattering / Heterocoagulation / Emulsion |
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| Research Abstract |
The purpose of this project is to produce some monodisperse anomalous polymer microspheres having high light scattering ability and we have succeeded it as follows:
1. Anomalous polymer microspheres having many voids therein were produced by two steps alkali/acid treatment, which we proposed, of styrene-butyl acrylate-methacrylic acid terpolymer microspheres prepared by emulsifier-free emulsion terpolymerization.
2. Anomalous polymer microspheres having uneven surfaces were produced by stepwise heterocoagulation method, which we proposed. For example, 0.2 um-sized cationic polymer particles having Tg of about 100ﾟC were coagulated onto 0.8 mu-sized anionic polymer particles having Tg of about 70ﾟC. The surface unevenness of the heterocoagulated particles could be controlled by heat treatment.
3. "Golf ball-like" polymer particles were produced by seeded emulsion polymerization of butyl acrylate in the presence of polystyrene particles.
4. Micron-sized polymer particles having voids therein were produced by extraction treatment of crosslinked monodisperse polymer particles with toluene under reflex, which were produced by seeded copolymerization for monomer-swollen particles of polystyrene with styrene and divinyl benzene prepared by the dynamic swelling method, which we produced.
We have confirmed that a part of the above produced particle had a high light scattering ability.
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