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Synthesis and characterization of new polyamides derived from 1,3-bis[4-(4-aminophenoxy)phenyl]adamantane

✍ Scribed by Yaw-Terng Chern; Kuo-Sheng Lin; Shen C. Kao

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 193 KB
Volume: 68
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19980411)68:2<315::aid-app13>3.0.co;2-w

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✦ Synopsis

Several new polyamides were synthesized by direct polycondensation of the 1,3-bis[4-(4-aminophenoxy)phenyl]adamantane ( I) with various dicarboxylic acids. The polyamides had inherent viscosities and number-average molecular weights ( M n ) of 0.46-0.96 dL/g and 28,000-109,000, respectively. All polyamides III had good solubilities and were soluble in N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), and pyridine. Polyamides had tensile strengths of up to 72.3 MPa, elongation to breakage values of up to 10.2%, and initial modulus of up to 2.1 GPa. Their glass transition temperatures were found to be 228-269ЊC and 252-307ЊC using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA), respectively. The melting temperature of III f was observed at 318ЊC using DSC. The temperatures of polyamides III at a 5% weight loss ranged from 395 to 435ЊC in air and from 400 to 450ЊC in a N 2 atmosphere. ᭧ 1998

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