4.7 Article

Influence of ultraviolet radiation on polystyrene

Journal

Publisher

ELSEVIER
DOI: 10.1016/j.jmrt.2021.04.035

Keywords

Polystyrene; Ultraviolet degradation; Fatigue behavior

Funding

  1. CAPES
  2. CNPq
  3. FAPERJ
  4. Materials Laboratory of the Brazilian Army Technology Center (CTEx)

Ask authors/readers for more resources

The study investigated the mechanical, structural, and morphological properties of polystyrene under fatigue combined with accelerated aging. It was found that irradiation caused changes in mechanical resistance and properties such as reduced molecular mass and increased crystallinity, influencing the failure mechanism in mechanically fractured specimens.
The mechanical, structural, and morphological properties of polystyrene under fatigue combined with accelerated aging were investigated. Modifications produced by irradiation were evaluated by physical and mechanical tests. The results revealed that under fatigue condition (tension-tension) combined with exposure to the most intense sun ultraviolet (UV-B) radiation interval of wavelength from 280 to 320 nm, in the period of 336 and 575 h, the mechanical resistance was found lower when compared to polystyrene not irradiated. Changes in the properties of the degraded materials, such as reduced molecular mass due to chain scission and increased crystallinity were evidenced. The predominant failure mechanism in mechanically fractured specimens was also influenced by irradiation and the hardening of the surface layer was characterized by microhardness Vickers. (C) 2021 The Authors. Published by Elsevier B.V.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available