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Synthesis of hyperbranched aromatic polyamide–imide and its grafting onto multiwalled carbon nanotubes
Author(s) -
Feng QingPing,
Xie XuMing,
Liu YiTao,
Zhao Wei,
Gao YanFang
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26772
Subject(s) - polyamide , imide , polymer chemistry , monomer , materials science , fourier transform infrared spectroscopy , tetrahydrofuran , carbon nanotube , thermal stability , terephthalic acid , polymer , chemical engineering , polyester , organic chemistry , chemistry , composite material , solvent , engineering
A flexible hyperbranched aromatic polyamide–imide (PAI) having an amine group in the center and carboxyl groups in the ends was synthesized from a AB 2 type of monomer of 2‐(6‐aminohexylcarbomoyl) terephthalic acid that was prepared from trimellitic anhydride and 1,6‐diaminohexane. Fourier transformed infrared spectra (FTIR), NMR, and ES‐MS were used to characterize the structure of the monomer and the synthesized hyperbranched polymer. Then the hyperbranched PAI was grafted onto the multiwalled carbon nanotubes (MWNTs) that was first treated by acid and changed into MWNT‐COCl by SOCl 2 in a tetrahydrofuran solution. By observation with transmission electron microscopy and characterization with FTIR and thermal gravity of analysis, the functionalized MWNTs were terminally enclosed with polymer; it was believed that the MWNTs were linked with a big carboxylic claw at the end and the adsorption ability of the MWNTs to NH 2 ‐substrate was enhanced. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007