Advertisement

Journal of Polymers and the Environment

, Volume 13, Issue 4, pp 339–348 | Cite as

Effect of Nanoscale SiO2 and TiO2 as the Fillers on the Mechanical Properties and Aging Behavior of Linear Low-Density Polyethylene/Low-Density Polyethylene Blends

  • Gang Liu
  • Yan-feng Li
  • Feng-yuan YanEmail author
  • Zhen-xing Zhao
  • Lin-cheng Zhou
  • Qun-ji Xue
Article

Abstract

Linear low-density polyethylene (LLDPE) was blended with low-density polyethylene (LDPE) at a fixed ratio (80 wt LLDPE and 20 wt %LDPE) and filled with nanoparticles of SiO2 and TiO2 at a ratio up to wt 5%, so as to develop the polymeric composites suitable to preparing the agricultural micro-irrigation pipes having good environmental adaptability. These compounds were blended using calcium stearate, polyethylene wax, and titanate coupling agent as the auxiliary dispersants, and ethylene-vinyl acetate copolymer (EVA) as the toughness improver. The LLDPE/LDPE composites filled with the nanoparticles were extruded and injected to prepare the composites specimens for the performance evaluations and micro-irrigation pipe field test. The mechanical properties, thermostability, and processibility of the injected composites were investigated. The effect of heating in an oven and irradiating by ultraviolet on the mechanical properties of the composites was explored. The environmental adaptability of the micro-irrigation pipes made of the filled LLDPE/LDPE composites was evaluated making use of long-term outdoor field test in northwest China where the arid and harsh natural conditions are of great concerns. It was found that the LLDPE/LDPE blend with the LLDPE mass fraction fixed as 80% showed balanced mechanical and thermal properties and flexibility, and was suitable to be used as the basic resin matrix. The incorporation of nano-TiO2 contributed to effectively improving the resistance to heating and ultraviolet irradiation of the composites. The composite made from 91% basic resin matrix, 6% EVA, and 3% mixed nano-SiO2 and TiO2, showed balanced comprehensive properties. The micro-irrigation pipes made of this filled LLDPE/LDPE composite had good environmental adaptability and service behavior in a three-year field test and were suitable to be used in arid area.

Keywords

Linear low-density polyethylene nanoparticles composite mechanical properties aging behavior 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Liu, G., Xue, Q., Zhang, Y., Lu, W. 2002Water Econ. Irrigat579Google Scholar
  2. 2.
    Lin, Q., Liu, H., Lu, H. 2001Plastics Technol42021Google Scholar
  3. 3.
    Yamaguchi, M., Abe, S. 1999J. Appl. Polym. Sci7431533159CrossRefGoogle Scholar
  4. 4.
    Scott, C., Ishida, H. 1991J. Rein. Plastics Compos10463476Google Scholar
  5. 5.
    Ozden, S., Borukayev, T. A., Mashukov, N. I., Mikitayev, A. K. 2002Polym. Polym. Compos10249256Google Scholar
  6. 6.
    Srivastava, D. 2004J. Polym. Environ122733CrossRefGoogle Scholar
  7. 7.
    Feldman, D. 2002J. Polym. Environ10163173CrossRefGoogle Scholar
  8. 8.
    GB/T (1040–1992) Plastics—Determination of tensile properties. Commission of China National Standards, BeijingGoogle Scholar
  9. 9.
    GB/T (9341–2000) Plastics—Determination of bending properties. Commission of China National Standards, BeijingGoogle Scholar
  10. 10.
    GB/T (1633–2000) Plastics—Thermoplastic materials: determination of Vicat softening temperature (VST). Commission of China National Standards, BeijingGoogle Scholar
  11. 11.
    GB/T (3682–1989) Test method to determine flowing rate of melted thermoplastics. Commission of China National Standards, BeijingGoogle Scholar
  12. 12.
    GB/T (5470–1985) Test method for low temperature brittleness of plastics. Commission of China National Standards, BeijingGoogle Scholar
  13. 13.
    GB/T (1842–1980) Test method for environmental stress cracking resistance of plastics. Commission of China National Standards, BeijingGoogle Scholar
  14. 14.
    Moreira, V. X., Soares, B. G. 2002Polym. Polym. Compos10381390Google Scholar
  15. 15.
    Liang, X., Yao, K., Nie, W. 2001China Plastics Indus104143Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Gang Liu
    • 1
  • Yan-feng Li
    • 2
  • Feng-yuan Yan
    • 1
    Email author
  • Zhen-xing Zhao
    • 1
  • Lin-cheng Zhou
    • 2
  • Qun-ji Xue
    • 1
  1. 1.State Key Laboratory of Solid lubricationLanzhou Institute of Chemical Physics, Chinese Academy of SciencesLanzhouChina
  2. 2.State Key Laboratory of Arid AgroecologyCollege of Chemistry and Chemical Engineering, Lanzhou UniversityLanzhouChina

Personalised recommendations