Effect of temperature, irradiation dose, and dose rate on the retention of some radioisotopes in poly(methyl methacrylate)/phosphate/composites

2012 ◽  
Vol 44 ◽  
pp. 50-57 ◽  
Author(s):  
O. Alhassanieh ◽  
Z. Ajji
Keyword(s):  
Methyl Methacrylate ◽  
Dose Rate ◽  
Irradiation Dose ◽  
Effect Of Temperature ◽  
Poly Methyl Methacrylate ◽  
Temperature Irradiation

Effect of temperature on ortho-positronium in poly(methyl methacrylate)

2000 ◽  
Vol 71 (1) ◽  
pp. 93-97 ◽  
Author(s):  
Hamdy F.M. Mohamed ◽  
A.M.A. El-Sayed ◽  
Gomaa G. Abd-Elsadek
Keyword(s):  
Methyl Methacrylate ◽  
Effect Of Temperature ◽  
Poly Methyl Methacrylate

Gas Sensing Materials from Carbon Black/Poly(Methyl Methacrylate) Composites

2003 ◽  
Vol 11 (4) ◽  
pp. 291-299 ◽  
Author(s):  
Xian Ming Dong ◽  
Ruo Wen Fu ◽  
Ming Qiu Zhang ◽  
Bin Zhang ◽  
Jun Rong Li ◽  
...  
Keyword(s):  
Carbon Black ◽  
Methyl Methacrylate ◽  
Gas Sensing ◽  
In Situ Polymerization ◽  
Effect Of Temperature ◽  
Electric Resistance ◽  
Poly Methyl Methacrylate ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold

In this work, the electrical conductivity of carbon black/poly(methyl methacrylate) composites and its responsiveness to organic solvent vapors were investigated. The carbon black-polymer conducting composites were synthesized by in-situ polymerization. They exhibited a low electrical percolation threshold (~3.3wt% of carbon black). The electric resistance of the composites increased drastically by over 104 times when they were exposed to good solvent vapours such as chloroform, tetrahydrafuran and ethyl acetate, and it recovered when the composites were transferred to air. The effect of temperature on the vapour responsivity of the composites was notable. An elevated temperature accelerated the vapour-induced variation in electrical resistance of the composites. The experimental data also indicate that the composites possessed a good reproducibility of vapour responsivity. These results suggest that they can be regarded as promising gas sensors characterized by easy processability and cost effectiveness.

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