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本文用TGA和DTGA法,研究了桑蚕茧的热分解动力学。所得结果表明,在50～620℃的范围内、■气流中桑蚕茧丝的热分解反应分成两个阶段。开始分解温度为210℃左右,第一阶段热分解反应速率达极大值时,对应的温度为320℃左右,其动力学参数:E_1=245.2kJ/mol,n_1=3,动力学方程为-1n(1-α)=kt~3;420℃左右时,开始第二阶段,约在570℃处反应速率再次达到极大值,至600℃左右时,热分解反应基本完毕,这阶段的动力学参数E_2=74.7kJ/mol,n_2=0。
In this paper, TGA and DTGA method to study the silkworm cocoon thermal decomposition kinetics. The results obtained show that in the range of 50 to 620 ° C, the thermal decomposition reaction of silkworm cocoon filaments in the air stream is divided into two stages. The initial decomposition temperature is about 210 ℃, the corresponding temperature is about 320 ℃ in the first stage, the kinetic parameters are: E_1 = 245.2kJ / mol, n_1 = 3, the kinetic equation is - 1n (1-α) = kt ~ 3. When the temperature is about 420 ℃, the second stage begins. The reaction rate reaches the maximum again at about 570 ℃. At 600 ℃, the thermal decomposition reaction is basically completed. Learning parameters E_2 = 74.7kJ / mol, n_2 = 0.