Influence of Natural and Accelerated Weathering on the Mechanical Properties of Low-Density Polyethylene Films

Muhammad Abduh Tuasikal, Othman Y. Alothman, Mohammad Luqman, S. M. Al-Zahrani, M. Jawaid

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Natural and accelerated weathering tests were performed to inspect the effect of antioxidants on low-density polyethylene (LDPE) films used as greenhouse covering materials. The LDPE pellets were extruded and blown into a film using a twin-screw extruder and film blowing machine, respectively. The film with 0.2 wt.% Alkanox-240 (AN-0.2) stabilizer showed the highest tensile strength (11 MPa) among all samples during 90 days of natural as well as accelerated weathering. The elastic modulus of the film with 0.5 wt.% of Good-rite (GR-0.5) increased after weathering from approximately 91.8 to 138.9 MPa, and showed the best performance. Morphological images of the neat LDPE film during weathering showed some cracks and grooves, while those of stabilized films showed fewer cracks. Moreover, the estimation of the rapidity of the accelerated method compared to the natural one was approximately nine times faster in Riyadh during the summer season (June-August). The present study suggests that the addition of antioxidants can improve the tensile strength, stability, and, hence, the effectiveness of these films. The best antioxidants were found to be 0.2 wt.% Alkanox and 0.5 wt.% Good-rite antioxidants.

Original languageEnglish
Pages (from-to)189-203
Number of pages15
JournalInternational Journal of Polymer Analysis and Characterization
Volume19
Issue number3
DOIs
Publication statusPublished - Apr 2014
Externally publishedYes

Keywords

  • Antioxidants
  • Low-density polyethylene (LDPE)
  • Mechanical properties
  • Morphological properties
  • UV stabilizers
  • Weathering

ASJC Scopus subject areas

  • Analytical Chemistry
  • General Chemical Engineering
  • Polymers and Plastics

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