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本文用热重分析研究了本所新研制的线性端羟基聚氨酯弹性粘合剂,利用作者新编的“热重动力学计算机程序包”,采用Coast—Redfern法,测定了四种样品的热重数据并首次报导了这四种样品在热降解两个阶段的动力学数据。在热降解第一阶段,反应级数n为0.7～1.4,热降解表观活化能E为127.14～135.84KJ/moi.,频率因子A为1.37×10~(12)～14.37×10~(12)秒~(-1)。在热降解第二阶段、反应级数n均为3,E为199.54～218.52KJ/mol,,A为2.99×10~(16)～5.35×10~(17)秒~(-1)。作者分别建立了四种样品在热降解两个阶段中的动力学方程,并估算了它们在不同温度下的使用寿命,建立了三种样品的热寿命经验公式。
In this paper, thermogravimetric analysis of the new linear hydroxyl-terminated polyurethane elastic adhesive developed by the author using the new “thermogravimetric kinetic computer package”, using the Coast-Redfern method, the determination of the four samples of the thermogravimetric The data and for the first time reported the kinetic data of these four samples in the two stages of thermal degradation. In the first stage of thermal degradation, the reaction order n is 0.7-1.4, and the apparent thermal activation energy E is 127.14-135.84 KJ / mol. The frequency factor A is 1.37 × 10-12 (14.37 × 10-12) ) Seconds ~ (-1). In the second stage of thermal degradation, the reaction order n is 3, E is 199.54 ~ 218.52KJ / mol and A is 2.99 × 10 ~ (16) ~ 5.35 × 10 ~ (17) s ~ (-1). The authors established the kinetic equations of the four samples in the two stages of thermal degradation respectively, and estimated their service life at different temperatures. The empirical formulas for the thermal life of the three samples were established.