S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Synthesis and characterization of polyaniline nanorods as curing agent and nanofiller for epoxy matrix composite
- Jang, Jyongsik; Bae, Joonwon; Lee, Kyungtae
- Issue Date
- Polymer 2005;46:3677–3684
- Novel PANI nanorods with average diameter of 21–53 nm and length of 0.5–1 mm were synthesized by dispersion polymerization method.
The morphology of obtained PANI nanorods was significantly dependent on the type of salt, stirring, and polymerization temperature.
Dispersion polymerization with FeCl3 produced longer nanorods than ammonium persulfate (APS) and magnetic stirring decreased the
length of nanorods. While the average diameter of PANI nanorods decreased with increasing reaction temperature, the electrical conductivity
dropped considerable at high polymerization temperature due to the increment of insulating emeraldine base. Dynamic differential scanning
calorimetry (DSC) study showed that the heat of cure was independent of heating rate. On the contrary, the heat of cure was proportional to
the content of PANI nanorods as a role of curing agent. Isothermal DSC study revealed that the cure behavior of LCE/PANI nanorod system
was an auto-catalyzed reaction. Thermogravimetric analysis (TGA) indicated that the thermal stability of cured LCE/PANI nanocomposite
was significantly dependent on the PANI nanorod composition. In addition, the electrical conductivity of LCE/PANI nanocomposite
materials was higher than that of conventional epoxy composites. Therefore, PANI nanorods played a role of curing agent owing to the
existent amine group and acted as reinforcing filler for cured LCE nanocomposites.
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