Abstract:Natural rubber (NR)/clay and styrene-butadiene rubber (SBR)/clay nanocomposites were prepared by mixing with aqueous sodium montmorillonite (Na 1 -MMT) clay dispersion by different concentrations of Na 1 -MMT ranging from 2 to 10 phr. These nanocomposites were irradiated with gamma radiation at doses from 10 to 100 kGy. X-ray diffraction (XRD) results indicated well dispersion of rubber latex into clay stacked layers and the platelets have a preferential orientation forming exfoliated NR/Na 1 -MMT nanocomposit… Show more
“…At higher radiation absorbed dose of 150 kGy, tensile strength and modulus of nanocomposites decreased considerably. The decrease in the value indicates that main chain was degraded and the polymer may become fragmented because of the increase in the energy at the same time as the clustering of CNTs and montmorillonite in the composite, as highlighted in the TEM results which are accountable for the low tensile properties ( Tarawneh et al, 2013 ; Youssef et al, 2017 ). Fig.…”
A thermoplastic elastomer (TPE) based nanocomposite with the same weight ratio of hybrid nanofillers composed of carbon nanotubes (CNTs) and montmorillonite nanoclay (DK4) was prepared using a melt blending technique with an internal mixer. The TPE composite was blended from polylactic acid (PLA), liquid natural rubber (LNR) as a compatibilizer and natural rubber (NR) in a volume ratio of 70:10:20, respectively. The weight ratio of CNTs and DK4 was 2.5 wt%. The prepared samples were exposed to gamma radiation at range of 0–250 kGy. After exposure to gamma radiation, the mechanical, thermo-mechanical, thermal and electrical conductivity properties of the composites were significantly higher than unirradiated TPE composites as the irradiation doses increased up to 150 kGy. Transmission electron microscopy (TEM) micrographs revealed the good distribution and interaction between the nano-fillers and the matrix in the prepared TPE hybrid nanocomposites. In summary, the findings from this work definite that gamma irradiation might be a viable treatment to improve the properties of TPE nanocomposite for electronic packaging applications.
“…At higher radiation absorbed dose of 150 kGy, tensile strength and modulus of nanocomposites decreased considerably. The decrease in the value indicates that main chain was degraded and the polymer may become fragmented because of the increase in the energy at the same time as the clustering of CNTs and montmorillonite in the composite, as highlighted in the TEM results which are accountable for the low tensile properties ( Tarawneh et al, 2013 ; Youssef et al, 2017 ). Fig.…”
A thermoplastic elastomer (TPE) based nanocomposite with the same weight ratio of hybrid nanofillers composed of carbon nanotubes (CNTs) and montmorillonite nanoclay (DK4) was prepared using a melt blending technique with an internal mixer. The TPE composite was blended from polylactic acid (PLA), liquid natural rubber (LNR) as a compatibilizer and natural rubber (NR) in a volume ratio of 70:10:20, respectively. The weight ratio of CNTs and DK4 was 2.5 wt%. The prepared samples were exposed to gamma radiation at range of 0–250 kGy. After exposure to gamma radiation, the mechanical, thermo-mechanical, thermal and electrical conductivity properties of the composites were significantly higher than unirradiated TPE composites as the irradiation doses increased up to 150 kGy. Transmission electron microscopy (TEM) micrographs revealed the good distribution and interaction between the nano-fillers and the matrix in the prepared TPE hybrid nanocomposites. In summary, the findings from this work definite that gamma irradiation might be a viable treatment to improve the properties of TPE nanocomposite for electronic packaging applications.
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