Iranian Polymer Journal

, Volume 28, Issue 4, pp 325–335 | Cite as

Effects of zinc oxide particle shape on properties of a prevulcanized latex

  • Kannika Junlapong
  • Sumetha Suwanboon
  • Chuanpit KhaokongEmail author
Original Research


From a zinc precursor of zinc nitrate hexahydrate and a precipitating agent of sodium hydroxide, zinc oxide (ZnO) was hydrothermally synthesized. Using different formulations and different reaction conditions of time and temperature, the obtained ZnO presented two different morphologies: short prism-like, and flower-like. X-ray diffraction data confirmed the wurtzite structure of the obtained ZnO. The short prism ZnO presented a higher specific surface area than the flower-like and the conventional forms. The synthesized ZnO was then compounded with natural rubber (NR) latex at loading contents of 0.1–0.6 phr and NR with conventional ZnO (CZnO) at 1 phr which was used for comparison. The tensile and tear strength of all vulcanizates increased with increased loadings of ZnO, except the vulcanizate containing flower-like ZnO. NR vulcanized films containing short prism ZnO at 0.4 phr showed the highest mechanical properties and they were higher than those of the film containing CZnO at 1 phr. Modulus of all samples tended to increase with increasing content of the synthesized ZnO and it was comparable with the modulus of the sample contained CZnO. NR films containing either short prism or flower-like ZnO showed nearly the same elongation-at-break. The cross-link density of short prism ZnO-incorporated NR was higher than NR comprising flower-like ZnO and CZnO. Furthermore, the aging properties of films containing synthesized ZnO were comparable with the properties of rubber films containing CZnO. Hence, 0.4 phr short prism ZnO was the optimum content for the preparation of prevulcanized latex.


Vulcanization Hydrothermal synthesis  Activator Surface area Compounding latex 



The authors are grateful for the financial support provided by Faculty of Science Research Fund, Contract no. 2-2556-02-028. They also acknowledge Mr. Thomas Coyne for his kind assistance in editing the English.

Supplementary material

13726_2019_702_MOESM1_ESM.doc (41 kb)
Supplementary material 1 (DOC 41 KB)


  1. 1.
    Roy K, Alam MN, Mandal SK, Debnath SC (2014) Sol–gel derived nano zinc oxide for the reduction of zinc oxide level in natural rubber compounds. J Sol-Gel Sci Technol 70:378–384CrossRefGoogle Scholar
  2. 2.
    Maciejewska M, Zaborski M (2014) Effect of ionic liquids on the dispersion of zinc oxide and silica nanoparticles, vulcanisation behaviour and properties of NBR composites. Exp Polym Lett 8:932–940CrossRefGoogle Scholar
  3. 3.
    Chapman A, Johnson T (2005) The role of zinc in the vulcanization of styrene-butadiene rubbers. Kautsch Gummi Kunst 58:358–361Google Scholar
  4. 4.
    Kadlcak J, Kuritka I, Konecny P, Cermak R (2011) The effect of ZnO modification on rubber compound properties. In: Proceedings of 4th WSEAS international conference on energy and development, environment and biomedicine, July 14–16, Corfu Island, pp 347–352Google Scholar
  5. 5.
    Kruger FWH, McGill J (1991) A DSC study of curative interactions. I. The interaction of ZnO, sulfur, and stearic acid. J Appl Polym Sci 42:2643–2649CrossRefGoogle Scholar
  6. 6.
    Coran AY (2003) Chemistry of the vulcanization and protection of elastomers: a review of the achievements. J Appl Polym Sci 87:24–30CrossRefGoogle Scholar
  7. 7.
    Heideman G, Noordermeer JWM, Data RN (2004) Zinc loaded clay as activator in sulphur vulcanization: a new route for zinc oxide reduction in rubber compounds. Rubber Chem Technol 77:337–355Google Scholar
  8. 8.
    Heideman G, Noordermeer JWM, Data RN (2005) Effect of zinc complexes as activator for sulphur vulcanization in various rubbers. Rubber Chem Technol 78:245–257CrossRefGoogle Scholar
  9. 9.
    Przybyszewska M, Zaborski M, Jakubowski B, Zawadiak J (2009) Zinc chelates as new activators for sulphur vulcanization of acrylonitrile-butadiene elastomer. eXpress Polym Lett 3:256–266CrossRefGoogle Scholar
  10. 10.
    Krishnamoorthy A, Varghese S, Kurian T (2015) Effect of micro and nano zinc oxide on the properties of pre-vulcanized natural rubber latex films. Prog Rubber Plast Recycl Technol 31:145–156CrossRefGoogle Scholar
  11. 11.
    Patarapaiboonchai O, Suwanboon S, Jitti-a-porn P (2011) Preparation and application of nano zinc oxide in natural rubber. The Thailand Research Fund, Bangkok (in Thai) Google Scholar
  12. 12.
    Akhlaghi S, Kalaee M, Mazinani S, Jowdar E, Nouri A, Sharif A, Sedaghat N (2012) Effect of zinc oxide nanoparticles on isothermal cure kinetics, morphology and mechanical properties of EPDM rubber. Thermochim Acta 527:91–98CrossRefGoogle Scholar
  13. 13.
    Sahoo S, Maiti M, Ganguly A, George JJ, Bhowmick AK (2007) Effect of zinc oxide nanoparticles as cure activator on the properties of natural rubber and nitrile rubber. J Appl Polym Sci 105:2407–2415CrossRefGoogle Scholar
  14. 14.
    Kim IJ, Kim WS, Lee DH, Kim W, Bae JW (2010) Effect of nano zinc oxide on cure characteristics and mechanical properties of silica-filled natural rubber/butadiene rubber compounds. J Appl Polym Sci 117:1535–1543Google Scholar
  15. 15.
    Mohammed SQ, Alhumdany AA, Al-Waily ML (2018) Effect of nano zinc oxide on tensile properties of natural rubber composites. Kufa J Eng 9:77–90CrossRefGoogle Scholar
  16. 16.
    Suntako R (2018) Effect of CaCO3 nanoparticles and synthesized ZnO nanoparticles on the properties of natural rubber. J Phys Conf Ser 1144:012156CrossRefGoogle Scholar
  17. 17.
    Suwanboon S, Amornpitoksuk P, Bangrak P, Randorn C (2014) Physical and chemical properties of multifunctional ZnO nanostructures prepared by precipitation and hydrothermal methods. Ceram Int 40:975–983CrossRefGoogle Scholar
  18. 18.
    Zhou Y, Liu C, Zhong X, Wu H, Li M, Wang L (2014) Simple hydrothermal preparation of new type of sea urchin-like hierarchical ZnO micro/nanostructures and their formation mechanism. Ceram Int 40:10415–10421CrossRefGoogle Scholar
  19. 19.
    Hasnidawani JN, Azlina HN, Norita H, Bonnia NN, Ratim S, Ali ES (2016) Synthesis of ZnO nanostructures using sol-gel method. Procedia Chem 19:211–216CrossRefGoogle Scholar
  20. 20.
    Suwanboon S, Amornpitoksuk P, Muensit N (2011) Dependence of photocatalytic activity on structural and optical properties of nanocrystalline ZnO powders. Ceram Int 37:2247–2253CrossRefGoogle Scholar
  21. 21.
    Fernando S, Madusanka N, Kottegoda N, Ratnayake UN (2012) Zinc oxide nanoparticles as an activator for natural rubber latex. In: International conference on advances in materials science and engineering, July 01–04, ColomboGoogle Scholar
  22. 22.
    Jayasuri MM, Makuuchi K, Yoshi F (2001) Radiation vulcanization of natural rubber latex using TMPTMA and PEA. Eur Polym J 37:93–98CrossRefGoogle Scholar
  23. 23.
    Xu J, Zhang Y, Chen Y, Xiang Q, Pan Q, Shi L (2008) Uniform ZnO nano rods can be used to improve the response of ZnO gas sensor. Mater Sci Eng B 150:55–60CrossRefGoogle Scholar
  24. 24.
    Panampilly B, Thomas S (2013) Nano ZnO as cure activator and reinforcing filler in natural rubber. Polym Eng Sci 53:1337–1346CrossRefGoogle Scholar
  25. 25.
    Santipanusopon S, Riyajan S-A (2009) Effect of field natural rubber latex with different ammonia contents and storage period on physical properties of latex concentrate, stability of skim latex and dipped film. Phys Procedia 2:127–134CrossRefGoogle Scholar
  26. 26.
    Przybyszewska M, Zaborski M (2010) Effect of ionic liquids and surfactants on zinc oxide nanoparticle activity in crosslinking of acrylonitrile butadiene elastomer. J Appl Polym Sci 116:155–164CrossRefGoogle Scholar

Copyright information

© Iran Polymer and Petrochemical Institute 2019

Authors and Affiliations

  1. 1.Department of Materials Science and Technology, Faculty of SciencePrince of Songkla UniversityHat YaiThailand

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