Thermal Degradation Kinetics of iPP/Pd Nanocomposite Prepared by a Drying Process


Palladium (Pd) nanoparticles were incorporated into isotactic polypropylene (iPP) film by a one-step dry process. iPP film was exposed to the sublimed Pd(acac)2 vapor in a glass vessel at 180oC. The Pd nanoparticles were observed by transmission electron microscope (TEM), and it was found that metallic nanoparticles were selectively loaded on the amorphous regions between the lamellae in iPP. Thermal degradation kinetics was investigated by introducing the data of thermogravimetric analysis (TGA) to Flynn & Wall equation. TGA data showed that thermal degradation temperature (Td) of the neat iPP was improved about 35oC by loading 0.27 wt% Pd nanoparticles. Thermal degradation activation energy (Ed) for iPP/Pd nanocomposite was 227.85 kJ/mol while that of neat iPP was 220.57 kJ/mol. These results meant that the Pd nanoparticles acted as a retardant in the thermal degradation of neat iPP polymer chain.

Share and Cite:

Y. Lee, H. Lee, S. Hong and I. Choi, "Thermal Degradation Kinetics of iPP/Pd Nanocomposite Prepared by a Drying Process," Advances in Materials Physics and Chemistry, Vol. 2 No. 4B, 2012, pp. 110-114. doi: 10.4236/ampc.2012.24B030.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] M. M. Demir, M. A. Gulgun, Y. Z. Menceloglu, B. Erman, S. S. Abramchuk, and E. E. Makhaeva, "Palladium nanoparticles by electrospinning from poly(acrylonitrile-co-acrylic acid)-PdCl2 solutions. Relations between preparation conditions, particle size, and catalytic activity," Macromolecules, vol. 37, pp. 1787-1792, 2004.
[2] D. S. dos Santos Jr., P. J. G. Goulet, N. P. W. Pieczonka, O. N. Oliveira Jr., and R. F. Aroca, "Gold nanoparticle embedded, self-sustained chitosan films as substrates for surface-enhanced Raman scattering," Langmuir, vol. 20, pp. 10273-10277, 2004.
[3] S. Porel, S. Singh, S. S. Harcha, D. N. Rao, and T. P. Radhakrishnan, "Nanoparticle-embedded polymer: In situ synthesis, free-standing films with highly monodisperse silver nanoparticles and optical limiting," Chem. Mater., vol. 17, pp. 9-12. 2005.
[4] C. Lu, C. Guan, Y. Liu, Y. Cheng, and B. Yang, "PbS/Polymer nanocomposite optical materials with high refractive index," Chem. Mater., vol. 17. pp. 2448-2454, 2005.
[5] A. J. Haes, S. Zou, G. C. Schatz, and R. P. Van Duyne, "Nanoscale optical biosensor: short range distance dependence of the localized surface plasmon resonance of noble metal nanoparticles," J. Phys. Chem. B, vol. 108, pp. 6961-6968, 2004.
[6] Z. H. Mibhele, M. G. Salemane, C. G. C. E. van Sittert, J. M. Nedeljkovic, V. Djokovic, and A. S. Luyt, "Fabrication and characterization of silver-polyvinyl alcohol nanocomposites," Chem. Mater., vol. 15, pp. 5019-5025, 2003.
[7] K. J. Klabunde, J. Habdas, and T. G. Cardenas, "Colloidal metal particles dispersed in monomeric and polymeric styrene and methyl methacrylate," Chem. Mater., vol. 1, pp. 481-483, 1989.
[8] S. G. Boyes, B. Akgun, W. J. Brittain, and M. D. Foster, "Synthesis, Characterization and properties of polyelectrolyte block copolymer brushes prepared by atom transfer radical polymerization and their use in the synthesis of metal nanoparticles," Macromolecules, vol. 36, pp. 9539-9548, 2003.
[9] S. Yoda, A. Hasegawa, H. Suda, Y. Uchimaru, K. Haraya, and T. Tsuji, "Preparation of platinum and palladium/polyimide nanocomposite film as a precursor of metal doped carbon molecular sieve membrane via supercritical impregnation," Chem. Mater., vol. 16, pp. 2363-2368, 2004.
[10] J. Y. Lee, S. Horiuchi, and H. K Choi, "Effect of palladium nanoparticles on the thermal degradation kinetics of α crystalline syndiotactic polystyrene," J. Ind. Eng. Chem., vol. 12, pp. 862-867, 2006.
[11] J. Y. Lee, Y. G. Liao, R. Nagahata, and S. Horiuchi, "Effect of metal nanoparticles on thermal stabilization of polymer/metal nanocomposites prepared by a one-step dry process," Polymer, vol. 47, pp. 7970-7979, 2006.
[12] J. Varga, "Polypropylene: structure andmorphology," ed. by J. Karger-Kocsis, Chapman & Hall, London, 1995.
[13] J. Junkasem, J. Menges, and P. Supaphol, "Mechanical properties of injection-molded isotactic polypropylene/roselle fiber composites," J. Appl. Polym. Sci., vol. 101, pp. 3291-3300, 2006.
[14] X. Sun, H. Li, J. Wang, and S. Yan, "Shear-induced interfacial structure of isotactic polypropylene (iPP) in iPP/fiber composites," Macromolecules, vol. 39, pp. 8720-8726, 2006.
[15] J. H. Flynn, "Degradation kinetics applied to lifetime predictions of polymers," Polym. Eng. Sci., vol. 20, pp. 675-677, 1980.
[16] J. Y. Lee, H. K. Lee, M. J. Shim, and S. W. Kim, "Thermal decomposition Characteristics of epoxy network chemically toughened with liquid rubber using dynamic TG analysis," J. Ind. Eng. Chem., vol. 6, pp. 250-255, 2000.

Copyright © 2022 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.