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Mechanical behavior of polyamide-6 after combined photo-oxidative and hygrothermal aging

Journal Article · · Colloid and Polymer Science
 [1];  [2];  [3]
  1. Texas A & M Univ., College Station, TX (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Texas A & M Univ., College Station, TX (United States); Texas A&M University at Qatar, Doha (Qatar)
  3. Texas A & M Univ., College Station, TX (United States)

The effect of moisture on the photo-oxidative degradation of polyamide-6 (PA-6) was studied by analyzing the mechanical response after two different accelerated aging procedures. In the first aging procedure, the PA-6 was only exposed to ultra-violet (UV) radiation at 60 °C. In the second procedure, the same duration of UV radiation was periodically interrupted while the relative humidity was raised to 100%. Diffusion-limited and nominally homogeneous degradation conditions were investigated using bulk and film specimens, respectively. Accelerated UV aging reduced the ductility of PA-6, but the additional hygrothermal exposure had no effect on the ductility or strength, indicating that humidity did not influence the photo-oxidation of PA-6. In conclusion, this finding contrasts with previous studies that found thermo-oxidation of PA-6 was accelerated by moisture.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Priorities Research Program (NPRP)
Grant/Contract Number:
NA0003525
OSTI ID:
2329569
Report Number(s):
SAND--2024-03528J
Journal Information:
Colloid and Polymer Science, Journal Name: Colloid and Polymer Science Journal Issue: 4 Vol. 302; ISSN 0303-402X
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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