Abstract
Short-term microwave irradiation was effectively used to devulcanize scrap ground tire rubber (GTR) particles. Microwave devulcanization was a short-time procedure, i.e. 1 min, 2 min and 4 min, during which, the GTR particles were exposed to continuous irradiation in order to cleave the cross-linked mono/di/poly sulfidic bonds (S-S, C-S) among their molecules to obtain the natural rubberlike ingredient. After that, polypyrrole (PPy) coated devulcanized GTR particles (PPy/dGTR) were used as substrates to grow carbon nanotubes (CNTs) on their surfaces through another rapid microwave treatment. Here, PPy coating had served as the effective microwave absorbing layer and the organic metallocene precursor (ferrocene) was used as the nucleation agent to promote the CNT growth. Eventually, the as-obtained products from each step were characterized in details via TGA, DSC, FT-IR, SEM, TEM, and their corresponding results were reported in order to verify and prove the success of the above mentioned methodology.
Keywords: Microwave irradiation, Scrap tire devulcanization, Conducting polymer, Carbon nanotube growth.
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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