物理化学学报 >> 1996, Vol. 12 >> Issue (07): 598-603.doi: 10.3866/PKU.WHXB19960705

研究论文 上一篇    下一篇

改性羧甲基羟丙基田菁胶热裂解动力学研究

王著,朱灵峰,张国宝,赵根锁,朱琰   

  1. 河南省化学研究所,郑州 450003
  • 收稿日期:1995-11-23 修回日期:1996-02-01 发布日期:1996-07-15
  • 通讯作者: 王著

Investigation of the Thermal Decomposition Kinetics of Modified Carboxyl Hydroxypropyl Sesbania Gum

Wang zhu,Zhu Ling-Feng,Zhang Guo-Bao,Zhao Gen-Suo,Zhu Yan   

  1. The Henan Institute of Chemistry,Zhengzhou 450003
  • Received:1995-11-23 Revised:1996-02-01 Published:1996-07-15
  • Contact: Wang zhu

摘要:

通过研究羟丙基田菁胶、羧甲基羟丙基田菁胶和改性羧甲基羟丙基田菁胶水溶液在不同温度下的粘性行为及其样品在流动空气和氮气流中的热裂解和裂解活化能计算,探讨了改性羧甲基羟丙基田菁胶的热稳定性.结果表明:与羟丙基田菁胶和羧甲基羟丙基田菁胶相比较,改性羧甲基羟丙基田菁胶的粘度热稳定性和裂解热稳定性高于羟丙基田菁胶和羧甲基羟丙基田菁胶,并且指出它们的热裂解属无规引发过程和以无规分布为主的非结晶状态.

关键词: 热稳定性, 裂解, 热裂解动力学, 多聚糖

Abstract:

 The viscosities of hydroxypropyl Sesbania Gum, carboxyl hydroxypropyl Sesbania Gum and modified carboxyl hydroxypropyl Sesbania Gum at different temperatures and their pyrolysis kinetics have been studied. The kinetic parameters under air and N2 were calculated. The heat-stability of the modified carboxyl hydroxypropyl Sesbania Gum was carefully studied. The results indicate that the viscosity heat-stability and heatstability for pyrolysis of modified carboxyl hydroxypopyl Sesbania Gum surpassed those of hydroxypropyl and carboxylhydroxypropyl Sesbania Gum. The results also indicate that the mechanism of thermal decomposition can be described by the model of random initation.

Key words: Heat-stability, Kinetics of thermal decompositon, Polysaccharide, Pyrolysis