Successful thermal self-polycondensation of AB2 monomer to form hyperbranched aromatic polyamide

Macromolecules

Volumn 31, Issue 17, 1998, Pages 5964-5966

  Yang, Gang ^a   Jikei, Mitsutoshi ^a   Kakimoto, Masa Aki ^a  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

AMORPHOUS MATERIALS; AROMATIC POLYMERS; CRYSTAL STRUCTURE; INFRARED SPECTROSCOPY; MOLECULAR STRUCTURE; MONOMERS; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; ORGANIC SOLVENTS; POLYCONDENSATION; VISCOSITY;

HYPERBRANCHED POLYMERS; THERMAL POLYCONDENSATION;

POLYAMIDES;

EID: 0032138979     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma980786+     Document Type: Article

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20. 4: C, 67.85; H, 4.79; N, 8.33. Found: C, 67.78; H, 4.70; N, 8.20.
21. 3: C, 71.69; H, 4.43; N, 8.80. Found: C, 70.49; H, 4.44; N, 8.59.
22. 1) for the quarternary carbons and carbonyl carbons of the polymer was measured in advance to be approximately 2.5 s, the sum of the acquisition and delay time for the measurement was set to 15 s.
23. -1.
24. 3: C, 68.11; H, 4.84; N, 6.11. Found: C, 68.43; H, 4.97; N, 6.01.
25. 2: C, 73.92; H, 4.29; N, 6.63. Found: C, 72.93; H, 4.55; N, 6.47.
26. Commercially available AA monomer (isophthalic acid) and BB monomer (p,p′-oxydiaminodiphenyl ether) were used after sublimation.
27. Tg for the crude product was lower than that for the purified product (200 °C). This is because that the crude contained low molecular weight components which were removed by reprecipitation.