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Journal of Materials Science

, Volume 37, Issue 23, pp 5141–5151 | Cite as

Thermal, UV- and sunlight ageing of thermoplastic elastomeric natural rubber-polyethylene blends

  • A. K. Bhowmick
  • J. R. White
Article

Abstract

The ageing of a new family of thermoplastic elastomers from blends of natural rubber and polyethylene was studied using thermal treatments at 65°, 80° and 90°C. The effects of including various stabilizers and dynamic vulcanization were also investigated. The results of UV ageing in a weatherometer and sunlight ageing of the same samples were compared. Thermal ageing of the blends of two polymers caused the tensile properties to deteriorate, especially at longer times or higher temperatures of ageing. The tensile strength and modulus of dynamically vulcanized blends, which registered higher tensile properties, increased in the initial stage on thermal ageing before a final drop. When an antioxidant for rubber or heat or light stabilizer for polyethylene was added, thermooxidative stability was increased. Dynamic mechanical properties also indicated changes due to ageing. UV and sunlight ageing of the samples revealed that the antioxidant for rubber improved the properties. The results are explained in terms of crosslinking, degradation and crystallinity of the blends. No cracking was observed on the surfaces of the aged samples, even under prolonged periods of ageing and on extending the specimens under the microscope.

Keywords

Polymer Mechanical Property Tensile Strength Polyethylene Rubber 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • A. K. Bhowmick
    • 1
  • J. R. White
    • 2
  1. 1.Rubber Technology CentreIndian Institute of TechnologyKharagpurIndia
  2. 2.Department of Mechanical, Materials & Manufacturing EngineeringUniversity of Newcastle upon TyneNewcastle upon TyneUK

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