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Home  >  Journal list  >  Polymer Journal  >  Vol.32  No.4 (2000)  >  pp.348-353

Polymer Journal
<<Previous article Vol.32  No.4 (2000)   pp.348 - 353 Next article>>

Synthesis and Characterization of Poly(aniline-co-xylidine)s

Xin-Gui LI1), Mei-Rong HUANG1) and Yuliang YANG2)
1) Department of Polymer Materials Science & Engineering, College of Materials Science & Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People’s Republic of China
2) Department of Macromolecular Science, Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, People’s Republic of China


ABSTRACT:  Copolymers were synthesized by oxidative polymerization of aniline and 2, 3-xylidine (XY) at five monomer ratios using ammonium persulfate as an oxidant in HCl medium. The yield and intrinsic viscosity of the copolymers were significantly dependent on monomer ratio. The copolymers were characterized by Fourier transform Infrared spectroscopy, 1Hnuclear magnetic resonance spectroscopy, wide-angle X-ray diffraction, DSC, and thermogravimetry. The results showed that the actual content of XY unit in the copolymers is much higher than feed XY unit content but 2, 3-xylidine cannot homopolymerize under the same condition. The copolymers are amorphous and exhibit thermal decomposition temperature higher than 395°C, char yield larger than 22wt% at 900°C in nitrogen. The activation energy of thermal decomposition for the copolymers decreased monotonically from 124kJ mol-1 to 42kJ mol-1 with increasing XY unit content from 10 to 90%.


Keyword:
Xylidine Copolymer/ Oxidative Copolymerization/ Soluble Aniline Terpolymer/ Nuclear Magnetic Resonance Spectrum/ Thermostability/ Degradation Kinetics

Published online: June 29, 2001
© Copyright, 2000 by The Society of Polymer Science, Japan

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