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Synthesis and characterization of composites of polyaniline and polyurethane‐modified epoxy
Author(s) -
Chiou WenChin,
Yang DoungYi,
Han JinLin,
Lee SungNung
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2066
Subject(s) - epoxy , materials science , diglycidyl ether , composite material , polyaniline , polyurethane , nanocomposite , fourier transform infrared spectroscopy , prepolymer , dynamic mechanical analysis , izod impact strength test , bisphenol a , polymer , ultimate tensile strength , chemical engineering , polymerization , engineering
A toughened, semiconductive polyaniline/polyurethane (PANI/PU)‐epoxy nanocomposite was prepared using a conductive polymer, PANI, and a PU prepolymer‐modified diglycidyl ether of bisphenol A (DGEBA) epoxy. The formation of a nanostructure was confirmed by Fourier transform infrared spectroscopy and SEM. The mechanical properties of the composites were evaluated and compared with those of the corresponding matrix. The improvement in impact strength of the composites (especially in the PANI/PU(PPG2000)‐epoxy system) was explained after fracture surface analysis using SEM. DSC and TGA studies indicated that the thermal properties of these composites were comparable to those of DGEBA epoxy. A conductivity in the range 10 −9 –10 −3 S cm −1 was obtained, depending on the testing frequency (10 3 –10 7 Hz) and the PANI content incorporated. Copyright © 2006 Society of Chemical Industry