Radiation-Stimulated Formation of Polyene Structures in Polyethylene Nanocomposites with Multi-walled Carbon Nanotubes
2019
Investigation of multi-walled carbon nanotubes (MWCNTs) and low-density polyethylene nanocomposites with MWCNT morphology were performed using transmission and scanning electron microscopy. Crystalline structure and crystallinity degree were studied for initial nanocomposites and after electron irradiation with different doses (0–4.72 MGy). It was established that a wide structured photoluminescence band (350–700 nm) occurs in bulk specimens of polytetrafluorethylene and its composites with MWCNTs as a result of thermal and mechanical impact during preparation. Five distinct components of spectra were identified as a manifestation of the excitation of –C=O– bonds and energy transfer from those bonds to polyenic π- conjugated chains of different lengths.
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