中文摘要：

用热重分析（TG）研究微生物凝固天然橡胶在30℃～600℃的热降解行为，探讨微生物凝固工艺对天然橡胶热稳定性的影响。结果表明，微生物凝固天然橡胶的热降解是一步反应，主要发生在300℃～450℃之间，为放热反应。起始降解温度To=332.3℃，最大降解速率温度Tp=377．3℃，终止降解温度Tf=445．2℃。酸凝固天然橡胶的To、Tp都比微生物凝固天然橡胶的低，证明微生物凝固天然橡胶的热稳定性比酸凝固天然橡胶的好。

英文摘要：

Thermogravimetry analysis （TG） was utilized to study thermal degradation behavior of NR -m in 30℃- 600℃. The effect of microbial - coagulating process on thermal stability of NR - m was discussed. The results showed that the thermal degradation of NR - m in nitrogen was an one - step reaction which was taken place mainly in the temperature range of 300℃ - 450℃. Thermal degradation reaction of NR - m was exothermic. The initial degradation temperature To = 332. 3 ℃, the temperature at the maximum degradation rate, that was, the peak temperature on a differential thermo- gravimetry curve （DTG） Tp = 377.3℃ and the final degradation temperature Tf = 445.2℃. TO and Tp of NR - m were higher than those of NR - a, which indicated that the thermal stability of NR - m was better than that of NR - a.