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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/3414

    Title: 2,6-Diamino-4-phenylphenol (DAPP) copolymerized polyimides: synthesis and characterization
    Authors: ChenBor-Kuan (陳伯寬)
    Keywords: polyimide
    2,6-diamino-4-phenylphenol (DAPP)
    Date: 2006
    Issue Date: 2009-08-14 23:31:06 (UTC+8)
    Abstract: Novel soluble copolyimides containing phenyl and hydroxyl pendant groups were synthesizedfrom pyromellitic dianhydride (PMDA) and two diamines, 2,6-diamino-4-phenylphenol (DAPP) and4,4'-oxydianiline (ODA), in various ratios via thermal imidization. The structures and physical propertiesof the copolyimides were characterized by FTIR, elemental analysis, DSC, dynamic mechanical analysis(DMA), TGA, a universal testing machine for stress–strain behaviour, and a dielectric analyzer to studythe effect of DAPP on the physical properties of the modified polymers. Copolyimides containing morethan 40mol% DAPP were soluble in hot N-methyl-2-pyrrolidone (NMP), dimethylacetamide (DMAc)and dimethylformamide (DMF), and possessed a high glass transition temperature (358 ℃) and a highmodulus (3.9GPa). Introduction of the diamine DAPP could also reduce the dielectric constant. Asegment of imide linkages could convert to benzoxazole linkages by decarboxylation at temperatureshigher than 420 ℃ under vacuum. Although the heat-treated polybenzoxazoles (PBOs) exhibited manygood properties, they were found to be too rigid and brittle to be processable for microelectronicapplications.
    Relation: Polymer International, v. 55, no. 1, 2006, p. 93-100
    Appears in Collections:[材料工程系所] 期刊論文

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