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Journal of Applied Chemistry
Volume 2014 (2014), Article ID 286709, 8 pages
Research Article

Kinetics and Thermodynamic Studies of Depolymerization of Nylon Waste by Hydrolysis Reaction

1Department of Chemistry, Institute of Science, Nagpur 440010, India
2Department of Chemistry, Sardar Patel College, Chandrapur 442402, India

Received 8 September 2014; Revised 18 November 2014; Accepted 18 November 2014; Published 8 December 2014

Academic Editor: Hongxing Dai

Copyright © 2014 D. B. Patil and S. V. Madhamshettiwar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Depolymerization reaction of nylon waste was carried out by hydrolysis reaction. Yield of depolymerization products was up to 72.20% for a two-hour reaction time. The products obtained were characterized by melting point and FTIR spectra. The values obtained for dibenzoyl derivative of hexamethylenediamine (DBHMD) agreed with those of the pure substance. Chemical kinetics of this reaction shows that it is a first-order reaction with respect to hexamethylenediamine (HMD) concentration with velocity constant  min−1. The energy of activation and Arrhenius constant obtained by Arrhenius plot were 87.22 KJg−1 and 0.129, respectively. The other thermodynamic parameters such as enthalpy of activation () and entropy of activation () and free energy of activation were 5975.85 J and −270.86 J·K−1·mol−1 and 101.59 KJ·mol−1, respectively.