Reference of 112-89-0, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 112-89-0, Name is 1-Bromooctadecane, SMILES is CCCCCCCCCCCCCCCCCCBr, belongs to bromides-buliding-blocks compound. In a article, author is Wang Yanli, introduce new discover of the category.
Synthesis, Thermal Degradation and Dielectric Properties of Poly[octyl(triphenylethynyl)]silane Resin
Octyl(triphenylethynyl)silane monomer(OTPES) was synthesized with ethyl bromide, octyltrichlorosilane and phenylethylene by Grignard reaction. The molecular structure was confirmed by FTIR and NMR. The poly[octyl(triphenylethynyl)] silane resin(POTPES) was prepared by thermal polymerization and the corresponding thermal degradation behavior wasstudied by thermogravimetric analysis(TG) combining with model and model-free fitted methods. The dielectric property of resin was also studied by vector network analyzer. The results show that the melt point of OTPES was 50 degrees C and the processing window was over 236 degrees C. The resin degradation temperature of T-d5 occurred over 433 degrees C and the char yield was over 60% at 800 degrees C. Based on Kissinger, Flynn-Wall-Ozawa, Coats-Redfern, Achar, Vyazovkin-Wight and Tang methods, the reaction activity(E) was 155.51, 152.97, 150.82, 146.02, 148.38 and 148.77 kJ/mol, respectively. Dielectric properties analysis displayed that the real part(epsilon’) and the imaginary part(epsilon ”) of the relative complex permittivity of POTPES was 2.5 and 0.05, respectively, and the dielectric loss tangent was between 0.03 and 0.25. The reflection loss of resin was more than -2.85 dB in all range of 1.5 mm thicknesses and 2.18 GHz frequency, which indicated that POTPES resin was a real wave-transparent resin matrix.
Reference of 112-89-0, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 112-89-0.