| Summary: | 碩士 === 國立中興大學 === 化學工程學系所 === 104 === The research is divided into two parts. The first part is synthesis of adamantine-containing polyimide. (2) will be prepared by the nucleophilic aromatic substitution reaction of (1) and 1-chloro-4-nitrobenzene. Novel diamine (3) with adamantly group will also be prepared by the reduction of (2) in the presence of hydrogen and Pd/C as catalyst.
The polyimides were polymerization from (3) and series dianhydride such us PMDA, ODPA, BTDA, BPADA。Novel polyimides exhibit superior thermal properties, thermal stability, low dielectric and low water absorption.
In the second part, Adamantan-containing benzoxazine with OH group were prepared from the concept of steric hindrance from diol (1), in which the OH group ortho to adamantly group, the hindered OH, is not reactive toward aldehyde. The structures of the monomers were confirmed by 1H NMR, 13C-NMR, FTIR spectra.
Copolymers were prepared co-curing BADCY and (2) with various molar ratio (1 %, 2 %, 5 %, 10%, 30% based on BADCY). For copolymers, the imidocarbonate linkeages, resulting from the reaction of phenolic OH and high polar OCN group, were able to reduce dielectric constant.
|
|---|
