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Synergistic effect of co-stabilizers on the thermal stability of polyvinyl chloride

Author Affiliations

  • 1School of Chemical Sciences, North Maharashtra University, Jalgaon-425001, Maharashtra, India
  • 2School of Chemical Sciences, North Maharashtra University, Jalgaon-425001, Maharashtra, India

Res. J. Material Sci., Volume 5, Issue (3), Pages 1-5, June,16 (2017)


In this research work synergistic effect between layered double hydroxide (LDH) and epoxidised sunflower oil (ESO) on the thermal stabilization of poly-vinyl chloride has been investigated. Synthesis of zinc glutarate and epoxidation reaction on sunflower oil was carried out in the laboratory. The Ca/Zn based soap compounds were used for the primary stabilizer for PVC. Synergistic effect of LDH with Ca/Zn stabilizer on the thermal stabilization of PVC with and without ESO was studied. Thermal stability of PVC was determined by Congo red test as a stability time (ts) while discoloration of the PVC sheets were examined using static oven test. Likewise thermal degradation of PVC was evaluated by Thermogravimetric analyzer (TGA) in terms of onset temperature from TGA curves. The results shows the enhancement in the thermal stabilization of PVC in presence of LDH and ESO. However, stabilizing effect of LDH with ESO on the thermal stability of PVC was more pronounced due to the mechanism of synergism by scavenging liberated HCl which obstructs the further degradation of PVC.


  1. Folarin O.M. and Sadiku E.R. (2011)., Thermal Stabilizers for Poly(Vinyl Chloride): A Review., Inter J. of the Phy. Scs., 6(18), 4323-4330.
  2. Shumin Li and Youwei Yao (2011)., Effect of Thermal Stabilizers Composed of Zinc Barbiturate and Calcium Stearate for Rigid Poly(vinyl Chloride)., Polym. Degrad. and Stab., 96(4), 637-641.
  3. Starnes W.H. (2002)., Structural and Mechanistic Aspects of the Thermal Degradation Of Poly(vinyl chloride)., Prog. in Polym. Sci., 27(10), 2133-2170.
  4. Krauskopf L.G. and Godwin A. (2005)., Plasticizers., PVC Handbook. Munich: Carl Hanser Verlag.
  5. Ming W., Haixia Li., Xingliang H. and Li Yi (2014)., Zinc Maleate And Calcium Stearate as a Complex Thermal Stabilizer for Poly (vinyl chloride)., J. of Vinyl Add. Techn., 20, 1-9.
  6. Atakul S., Balkose D. and Ulku S. (2005)., Synergistic Effect of Metal Soaps and Natural Zeolite on Poly(vinyl chloride) Thermal Stability., J. of Vinyl Add. Techn., 11(2), 47-56.
  7. Xie L., Li D. and Zhang J. (2013)., The Effect of Pentaerythritol-Aluminum on the Thermal Stability of Rigid Poly (vinyl chloride)., J. of App. Polym Sci., 130(5), 3704-3709.
  8. Yan-Bin Liu., Wei-Qu Liu. and Meng-Hua Hou. (2007)., Metal Dicarboxylates as Thermal Stabilizers for PVC., Polym. Degrad. and Stab., 92(8), 1565-1571.
  9. Benavides R., Edge M. and Allen N.S. (1998)., Stabilization of Poly(vinyl chloride) with Preheated Metal Stearates and Costabilizers. I. Use of a β-diketone., J. of App. Polym Sci., 68(1), 1-10.
  10. Gupta S., Agarwal D.D. and Banerjee S. (2009)., Synergistic Combination of Metal Stearates and Β-Diketones with Hydrotalcites in Poly(vinyl chloride) Stabilization., J. of App. Polym Sci., 112, 1056-1062.
  11. Ming Fu., Degang Li., Hao Li., Hongqi A., Yali Z. and Lipeng Z. (2016)., Synergistic Effects of Zinc-Mannitol Alkoxide with Calcium/Zinc Stearates and with Β-Diketone on Thermal Stability of Rigid Poly(vinyl chloride)., J. of Polym. Res., 23, 13.
  12. Bouchareb B. and Benaniba M.T. (2008)., Effects of Epoxidized Sunflower Oil on the Mechanical and Dynamical Analysis of the Plasticized Poly(vinyl chloride)., J. of App. Polym Sci., 107(6), 3442-3450.
  13. AOCS (1979). Official method Cd 9-57 revised., undefined, undefined
  14. Plastics- Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures- Part 1: Congo red method.( 1990). ISO 182-1., undefined, undefined
  15. Ocskay Gy., Nyitrak Zs., Vrfalvi F. and Wein T. (1971)., Investigation of Degradation Processes in PVC Based on the Concomitant Color Changes., Eur. Polym. J., 7(8), 1135-1145.
  16. Benanibaa M.T., Belhaneche-Bensemrab N. and Gelbardc G. (2001)., Stabilizing Effect of Epoxidized Sunflower Oil on the Thermal Degradation of Poly(vinyl chloride)., Polym. Degrad. and Stab., 74(3), 501-505.
  17. Linghua X., Degang Li., Ming Fu., Jun Z., Lipeng Z. and Pingping Z. (2015)., Study on Lanthanum-Pentaerythritol Alkoxide as a Thermal Stabilizer for Rigid Polyvinyl Chloride., J. of Vinyl Add. Techn. DOI 10.1002/vnl.21482.
  18. Benaniba M.T. and Nageotte V.M. (2010)., Evaluation Effects of Biobased Plasticizer on the Thermal, Mechanical, Dynamical Mechanical Properties and Permanence of Plasticized PVC., J. of Appl. Polym. Sci., 118(6), 3499-3508.