scholarly journals Gamma irradiation test report of simulated grout specimens for gas generation/liquid advection

1994 ◽  
Author(s):  
C.A. Hinman
Keyword(s):  
Gamma Irradiation ◽  
Gas Generation ◽  
Test Report ◽  
Irradiation Test

Effects of gamma irradiation on structural, thermal and mechanical properties of polyamide-11/halloysite nanotubes nanocomposites

2021 ◽  
pp. 089270572110319
Author(s):  
Mohamed Sahnoune ◽  
Mustapha Kaci ◽  
Hélène Garay ◽  
José-Marie Lopez-Cuesta ◽  
Mohamed Mahlous
Keyword(s):  
Mechanical Properties ◽  
Gamma Irradiation ◽  
Irradiation Dose ◽  
Chain Scission ◽  
Halloysite Nanotubes ◽  
Thermal And Mechanical Properties ◽  
Polyamide 11 ◽  
Irradiation Test ◽  
Twin Screw ◽  
Low Irradiation

The effect of gamma irradiation on neat Polyamide-11 (PA11) and PA11 filled with 3 wt% of halloysite nanotubes (HNTs) was investigated at various doses up to 100 kGy in air and at room temperature. The irradiation test was conducted on sample films prepared by a twin-screw extruder in the first step then cast extrusion. The study showed the formation of a maximum of gel fraction up to 10 and 20 kGy for neat PA11 and PA11/HNTs, respectively. Furthermore, the results indicated the occurrence of crosslinking at low irradiation dose, whereas chain scission took place at higher ones. Additionally, the results revealed that the presence of HNTs limits the impacts of gamma irradiation through a barrier effect. An optimum irradiation dose was found for thermal and mechanical properties, corresponding to the dose for maximum gel formation. Moreover, experimental design was implemented to highlight the main incidences and interactions of both halloysite incorporation and radiation dose on some relevant effects of gamma irradiation.

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