A novel triphenylphosphine-contained poly(ether ether ketone ketone) was synthesized from bis[4-(p-fluorobenzoyl)-phenyl]phenylphosphine oxide and hydroquinone by nucleophilic copolycondensation with sulfolane as the ...A novel triphenylphosphine-contained poly(ether ether ketone ketone) was synthesized from bis[4-(p-fluorobenzoyl)-phenyl]phenylphosphine oxide and hydroquinone by nucleophilic copolycondensation with sulfolane as the solvent. The structure was confirmed via FTIR, 31P NMR and 1H NMR. Electrical property, mechanical property, heat-resistance property, flame resistance and solubility were also evaluated. The results show that the polymer has an excellent heat-resistance, the glass transition temperature(Tg) is 212.6 ℃. The 5% mass loss of the polymer in nitrogen atmosphere took place at 476 ℃. The polymer is soluble in many organic solvents, such as CH2Cl2, CHCl3, Cl2(CH)2Cl2, Cl(CH2)2Cl, DMF, and NMP at room temperature, the polymer possesses well film ability, good mechanics property, electrical property, and the LOI is 44 which indicates that it possesses an excellent flame retardancy.展开更多
In order to prevent fire even explosion accident caused by hydrazines in chemical industry,the adiabatic stability of benzoyl hydrazine and p-nitro phenyl hydrazine are tested by Accelerating Rate Calorimeter(ARC).The...In order to prevent fire even explosion accident caused by hydrazines in chemical industry,the adiabatic stability of benzoyl hydrazine and p-nitro phenyl hydrazine are tested by Accelerating Rate Calorimeter(ARC).Then pseudo-inverse matrix method is used to calculate dynamics parameters of the two samples respectively.Finally,the measured data are modified by considering of thermal inertia factor of ARC.The results show that the initial exothermic temperature for benzoyl hydrazine is 141.16℃.with the maximum temperature being 364.50℃ and the time to maxinmm self-heating rate is 1061.11 min.But the initial exothermic temperature for p-Nitro phenyl hydrazine is 88.36℃,with the maximum temperature being 596.38℃ and the time to maximum self-heating rate is 314.67 min.It can be seen that p-nitro phenyl hydrazine is easier to explode and the explosion is more powerful.展开更多
文摘A novel triphenylphosphine-contained poly(ether ether ketone ketone) was synthesized from bis[4-(p-fluorobenzoyl)-phenyl]phenylphosphine oxide and hydroquinone by nucleophilic copolycondensation with sulfolane as the solvent. The structure was confirmed via FTIR, 31P NMR and 1H NMR. Electrical property, mechanical property, heat-resistance property, flame resistance and solubility were also evaluated. The results show that the polymer has an excellent heat-resistance, the glass transition temperature(Tg) is 212.6 ℃. The 5% mass loss of the polymer in nitrogen atmosphere took place at 476 ℃. The polymer is soluble in many organic solvents, such as CH2Cl2, CHCl3, Cl2(CH)2Cl2, Cl(CH2)2Cl, DMF, and NMP at room temperature, the polymer possesses well film ability, good mechanics property, electrical property, and the LOI is 44 which indicates that it possesses an excellent flame retardancy.
文摘In order to prevent fire even explosion accident caused by hydrazines in chemical industry,the adiabatic stability of benzoyl hydrazine and p-nitro phenyl hydrazine are tested by Accelerating Rate Calorimeter(ARC).Then pseudo-inverse matrix method is used to calculate dynamics parameters of the two samples respectively.Finally,the measured data are modified by considering of thermal inertia factor of ARC.The results show that the initial exothermic temperature for benzoyl hydrazine is 141.16℃.with the maximum temperature being 364.50℃ and the time to maxinmm self-heating rate is 1061.11 min.But the initial exothermic temperature for p-Nitro phenyl hydrazine is 88.36℃,with the maximum temperature being 596.38℃ and the time to maximum self-heating rate is 314.67 min.It can be seen that p-nitro phenyl hydrazine is easier to explode and the explosion is more powerful.
