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Journal of Central South University

, Volume 18, Issue 2, pp 331–336 | Cite as

Pyrolysis kinetics and TG-FTIR analysis of waste epoxy printed circuit boards

  • Zhi-hua Zhan (湛志华)
  • Ke-qiang Qiu (丘克强)Email author
Article

Abstract

Thermal decomposition of waste epoxy PCBs was performed in different atmospheres (nitrogen, argon, air and vacuum) at a heating rate of 10 °C/min by DSC-TGA, and the pyrolysis characteristic was analyzed. The gases volatilized from the experiment were qualitatively analyzed by TG-FTIR. Kinetics study shows that pyrolysis reaction takes place between 300 and 400 °C, and the activation energies are 256, 212 and 186.2 kJ/mol in nitrogen, argon and vacuum, respectively. There are two mass-loss processes in the decomposition under air atmosphere. In the first mass-loss process, the decomposition is the main reaction, and in the second process, the oxidation is the main reaction. The activation energy of the second mass-loss process is 99.6 kJ/mol by isothermal heat-treatments. TG-FTIR analysis shows carbon dioxide, carbon monoxide, hydrogen bromide, phenol and substituent phenol are given off during the pyrolysis of waste epoxy PCBs.

Key words

pyrolysis kinetics waste printed circuit boards 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Zhi-hua Zhan (湛志华)
    • 1
  • Ke-qiang Qiu (丘克强)
    • 1
    Email author
  1. 1.School of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina

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