Abuse of Smoking Methamphetamine Mixed with Tobacco: II. The Formation Mechanism of Pyrolysis Products

1990 ◽  
Vol 35 (3) ◽  
pp. 12864J ◽  
Author(s):  
Hitoshi Sekine ◽  
Yuju Nakahara
Keyword(s):  
Formation Mechanism ◽  
Pyrolysis Products

TG-FTIR Study on the Heat Treatment of Plasticized Melt-Spun PAN Precursors for Carbon Fiber

2012 ◽  
Vol 193-194 ◽  
pp. 444-447
Author(s):  
Bin Yan ◽  
Ke Qing Han ◽  
Jing Jie Zhang ◽  
Dan Wang ◽  
Su Ping Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Carbon Fiber ◽  
Formation Mechanism ◽  
Pyrolysis Products ◽  
Ftir Study ◽  
Melt Spun ◽  
Main Decomposition ◽  
Decomposition Stages ◽  
Pan Fibers

In this paper, the evolution of the gas evolved during the heat treatment of the plasticized melt-spun PAN fibers was investigated by TG-FTIR. TG, DTG and G-S (Gram-Schmidt) curves showed that there were two main decomposition stages during the heat treatment of melt-spun PAN fibers. And the results indicated that the main pyrolysis products were NH3 (966 cm-1 and 932 cm-1), HCN (713 cm-1), H2O (3650 cm-1), CH4 (1305cm-1), CO (2180 cm-1), CO2 (2360 cm-1 and 667 cm-1). The release of NH3 and HCN started at the same temperature 220 °C, which were the main products during the stabilization step. Besides, the formation mechanism of the pyrolysis products is presented in detail.

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