Synthesis and Characterization of Soluble Polyamide-imides with tert-butyl group
碩士 === 國立成功大學 === 化學工程學系碩博士班 === 90 === Abstract An imide ring-containing dicarboxylic acid was prepared by the condensation of 1,4-Bis(4-aminophenoxy)-2-tert-butyl benzene (BATB) and trimellitic anhydride(TMA) .A series of soluble poly(amide-imide)s containing tert-butyl units were synthesize...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2002
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| Online Access: | http://ndltd.ncl.edu.tw/handle/dug5ne |
| Summary: | 碩士 === 國立成功大學 === 化學工程學系碩博士班 === 90 === Abstract
An imide ring-containing dicarboxylic acid was prepared by the condensation of 1,4-Bis(4-aminophenoxy)-2-tert-butyl benzene
(BATB) and trimellitic anhydride(TMA) .A series of soluble poly(amide-imide)s containing tert-butyl units were synthesized via the triphenyl phosphite-activated direct polycondensation of this diimide-diacid with various aromatic diamines.Four of the obtained polymer had inherent viscosities of 0.53(dl/g)∼0.86(dl/g) and afforded flexible films.
These compounds are discussed and compared with those of polyimides which do not contain amide units and also with the poly(amide-imide) which do not contain tert-butyl units .All the polymers were then characterized by FTIR、H1-NMR、Instron、DSC、DMA and XRD .Most of resulting poly(amide-imide)s containing tert-butyl units showed an amorphous nature and were readily soluble in polar solvents such as NMP、DMF and DMAc .The glass transition temperature could be determined with the help of DMA clearly,which were recorded in the range 243∼266℃.Their 5﹪weight loss temperature were recorded in the range 473∼480℃ in nitrogen.
These polymer exhibited a desired combination of propertiesrequiring high-performance materials that include excellent thermal stability and excellent solubility in organic solvents.
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