DICP OpenIR
Subject Area物理化学
Thermodynamic Properties and Thermal Analysis of Deltamethrin
Wang JY(王建雅); Tan ZC(谭志诚)
Conference Name8th IUPAC Conference on Chemical Thermodynamics and The 12th National Conference on Chemical Thermodynamics and Thermal Analysis
Conference Date2004-8-17
2004-08-17
Conference Place中国
Pages498/1
Department十五室
Funding Organization中国化学会
AbstractThe (S)-alpha-cyano-3-phenoxybenzyl (1R)-cis-3-(2,2-dibromovinyl)-2,2-dimethylcyclo- propane carboxylate, or named deltamethrin (C22H19Br2NO3), is one of the high effective fenpropathrin pesticides. The compound was synthesized and characterized with NMR. The purity of sample used for calorimetric study was determined to be 0.9926 % by HPLC. The molar heat capacities of the compound were measured with an automatic adiabatic calorimeter in the temperature range of 80 ~ 400 K. The experimental molar heat capacities of the sample were fitted to polynomials with the least square fittings. The deviation of the experimental data from the smoothed values in the whole region is within ± 0.2 %. A solid-liquid phase transition was observed in the experimental temperature range. The melting point, (Tm), enthalpy and entropy of fusion,(Δfus Hm) and (ΔfusSm) were determined to be 372.15±0.02K,26.73±0.02 kJ• mol -1,71.81±0.06 J• K-1• mol -1, respectively. The thermodynamic functions of the compound, [HT – H298.15], [ST – S298.15] and [GT -G298.15] were derived with a temperature interval of 5 K in the temperature range of 298.15~ 400 K. The thermal decomposition of the compound was studied by thermogravimetric analysis (TG) in the temperature range of 470~ 680 K. The TG analysis indicated that the thermal decomposition of the compound starts at 510 K and ends at 575 K; the maximum decomposition rate was observed at 556 K. The order (n), pre-exponential factor (A) and activation energy (E) of the decomposition reaction were determined to be 1.78, 1.15•109 min-1 and 603.8 kJ•mol-1, respectively.
Language中文
Document Type会议论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/111774
Collection中国科学院大连化学物理研究所
Corresponding AuthorTan ZC(谭志诚)
Recommended Citation
GB/T 7714
Wang JY,Tan ZC. Thermodynamic Properties and Thermal Analysis of Deltamethrin[C],2004:498/1.
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