Experimental study of UV induced tensile properties deterioration and chemical aging of polyurea–POSS composites

Pal, Ghanshyam; Al-Ostaz, Ahmed; Li, Xiaobing; Alkhateb, Hunain; Cheng, Alexander H-D

doi:10.1177/08927057221137797

Experimental study of UV induced tensile properties deterioration and chemical aging of polyurea–POSS composites

Journal Article · 01 November 2022 · Journal of Thermoplastic Composite Materials

DOI:https://doi.org/10.1177/08927057221137797· OSTI ID:2423967

^[1]; Al-Ostaz, Ahmed ^[2]; Li, Xiaobing ^[2]; Alkhateb, Hunain ^[2]; Cheng, Alexander H-D ^[2]

Nano Infrastructure Research Group, Department of Civil Engineering, The University of Mississippi, Oxford, MS, USA; Civil Engineering, Shiv Nadar Institution of Eminence, Noida, India
Nano Infrastructure Research Group, Department of Civil Engineering, The University of Mississippi, Oxford, MS, USA

Ultraviolet (UV) radiation present in natural sunlight degrades the chemical and mechanical properties of polymeric matrices in composites. Polyurea possess a unique set of chemical and mechanical properties due to its complex microstructure comprising of hard and soft segments (phases). The primary objective of the work presented here is to characterize the chemical and mechanical degradation of pure polyurea and polyurea - polyhedral oligomeric silsesquioxane (POSS) nanocomposites subjected to UV radiation exposure for 45 days. Control specimen in as-received condition (reference specimen) and UV-aged tensile test specimen are tested in the study. Analysis of Fourier transformed infrared (FTIR) spectra for UV-aged polyurea and polyurea-POSS composites reveals that the addition of POSS nanoparticles accelerate the deterioration of polyurea matrix by breaking the hard phase network and altering the mechanism of degradation for the soft phase present in polyurea microstructure. The deterioration of hard and soft segments cause a significant reduction in tensile properties of polyurea-POSS composites.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 2423967

Journal Information:: Journal of Thermoplastic Composite Materials, Journal Name: Journal of Thermoplastic Composite Materials Journal Issue: 9 Vol. 36; ISSN 0892-7057

Publisher:: SAGE

Country of Publication:: United States

Language:: English

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