Basic Research for New Polycondensation Systems Using Transition Metal Catalyst
Grant-in-Aid for General Scientific Research (B)
|Allocation Type||Single-year Grants|
|Research Institution||Tokyo Institute of Technology|
IMAI Yoshio Tokyo Institute of Technology, Department of Organic and Polymeric Materials, Professor, 工学部, 教授 (50016557)
|Project Period (FY)
1989 – 1990
Completed(Fiscal Year 1990)
|Budget Amount *help
¥5,500,000 (Direct Cost : ¥5,500,000)
Fiscal Year 1990 : ¥1,000,000 (Direct Cost : ¥1,000,000)
Fiscal Year 1989 : ¥4,500,000 (Direct Cost : ¥4,500,000)
|Keywords||Palladium Catalysts / Nickel Catalysts / Block Copolymers / Aromatic Polyamides / Polydimethylsiloxanes / Carbonylation Reaction / Polyphenylene Vinylene / 一酸化炭素 / ポリアミド / 重縮合反応|
Preparation of aromatic polyamideーpolysiloxane block copolymers were investigated by the carbon monoxide insertion reaction using palladium catalyst starting from aromatic dihalides, aromatic diamines, and amine terminated polydimethylsiloxane oligomers. The following reaction conditions were determined to obtain high molecular weight block copolymers
1) Reaction Solvents
2) Palladium catalysts
3) Amines for hydrogen halides trap
4) concentration of monomers
5) Pressure of carbon monoxide
Finally, the block copolymers which offered fairly tough films were obtained.
On the other hand, general synthetic methodology of metal catalyzed polycondensation using nickel catalysts which were inexpensive compared with palladium ones. First, aromatic polyamides possessing fairly high molecular weights were obtain by the carbon monoxide insertion reaction using the nickel catalysts instead of palladium catalysts, whereas the molecular weights were slightlys smaller compared with the case of palladium.
Farthermore, nickel catalyst were applied to preparation of the new coupling reaction of geminal dihalide compounds in the presence of zinc powder. The polymer obtained from dichlorodiphenylmethane had only low molecular weight. But, the formation of oligomeric compounds had important meaning, because the reaction was quite new.
Research Output (9results)