中文摘要：

用热分析法（TGA／DTA）研究了氯化钙凝固天然橡胶（NR—c）在空气气氛中的热降解行为。研究结果表明，NR—c热氧降解属于多步反应，与传统酸凝固天然橡胶（NR—a）相比，NR-c降解特征温度均明显降低，NR-c的DTA放热峰明显向低温漂移，抗氧化性能明显下降。

英文摘要：

The thermal degradation of the nature rubber produced with calcium chloride coagulation （NR-c） was studied by TGA-DTA under air atmosphere. The results showed that the thermal oxidative degradation of NR-c was a multi-step reaction, compared with the nature rubber produced with acid coagulation （NR-a）, the characteristic degradation temperatures of NR-c were all decreased apparently, the DTA peaks of NR-c were shifted to low temperature, and the anti- oxygenation property decreased clearly.