NR／BR并用硫化胶热氧降解动力学研究  

Kinetics of Thermal Degradation of NR/BR Vulcanizate

作　　者：向建敏[1] 

机构地区：[1]武汉化工学院

出　　处：《橡胶工业》1995年第8期451-454,共4页China Rubber Industry

摘　　要：用热重分析法（ＴＧ）研究了天然橡胶／顺丁橡胶（ＮＲ／ＢＲ）并用硫化胶在室温至５００℃范围的热氧降解动力学。由Ｃｏａｔｓ－Ｒｅｄｆｅｒｎ法求得了两个降解阶段的反应级数和活化能，用Ｄｏｙｌｅ法计算了并用胶不同降解程度的表观活化能和频率因子，获得了相应的反应速率常数－温度（ｋ－Ｔ）关系，并用Ｆｕｏｓｓ方程计算了ＮＲ和ＢＲ氧化的活化能。The kinetics of thermal degradation of NR/BR vulcanizate in the range fromroom temperature to 500℃ was studied with TG. The activation energy and the reactionorder at two degradation stages were obtained with Coats--Red fern method. The relationshipbetween k (reaction rate constant) and T(temperature) was obtained through the calculationof the apparent activation energy and the frequency factor of the blend degradated in differentdegrees with DOyle method. The oxidation activation energy was calculated with FuossFormula.

关 键 词：天然橡胶 顺丁橡胶 并用胶 热氧降解 并用硫化胶 

分 类 号：TQ330.1[化学工程—橡胶工业]