2000 Fiscal Year Final Research Report Summary
Synthesis of Condensation Polymers Using Silylated Nucleophilic Monomers
| Project/Area Number |
09650969
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
高分子合成
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| Research Institution | Iwate University |
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Principal Investigator |
OISHI Yoshiyuki Iwate University, Engineering, Associated Prof., 工学部, 助教授 (90194076)
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| Project Period (FY) |
1997 – 2000
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| Keywords | Silylation method / in-situ Silylation method / N-Silylated diamine / Triazinedichloride / Sol-gel reaction / Polymer / silica hybrid / Poly (amic acid silyl ester) / Alicyclic polyimide |
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| Research Abstract |
A novel method for the synthesis of condensation polymers has been developed by the use of silylated nucleophilic monomers. This project deals with our studies on the synthesis of polymer/silica hybrids and alicyclic polyimides from N-silylated diamines.
1. Synthesis of polymer/silica hybrids using N-silylated aromatic diamines
The solution polycondensation of 6-substituted 1,3,5-triazine-2,4-dichlorides with N-silylated aromatic diamines gave readily higher molecular weight aromatic polyguanamines with the elimination of trimethylsilyl chloride under neutral reaction conditions, compared with conventional method using non-silylated diamines. This method could be utilized for the preparation of the polymer/silica hybrids by the sol-gel reaction of tetraethoxysilane in the presence of alkoxysilyl pendants-containing aromatic polyguanamines, which were successfully obtained by the polycondensation of alkoxysilyl-substituted triazinedichloride with N-silylated aromatic diamine.
2. Synthesis of alicyclic polyimides using N-silylated alicyclic diamines
The alicyclic polyimides with high molecular weights were successfully prepared from N-silylated alicyclic diamines in place of parent diamines. The polyaddition of N-silylated diamines or in-situ silylated diamines to alicyclic tetracarboxylic dianhydrides gave poly (amic acid silyl ester)s, which were converted to the alicyclic polyimides by the subsequent thermal treatment with the elimimation of trimethylsilanol.
Thus, the N-silylated diamine method is a versatile and promising route for the synthesis of polymer/silica hybrids and alicyclic polyimides.
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