胶料混炼过程中不溶性硫黄熔融与分解协调控制的研究

Coordinated Control of Melting Reaction and Decomposing Reaction of Insoluble Sulfur during Compound Mixing

对胶料混炼过程中不溶性硫黄(IS)熔融与分解协调控制进行研究。通过差式扫描量热分析得出IS的熔融速率最快温度为124.0℃,分解速率最快温度为132.9℃;采用HAAKE转矩流变仪对胶料混炼过程进行模拟,得出流变仪内壁温度(起始混炼温度)为90～95℃时,天然橡胶/IS共混胶中的IS既不分解,又能实现良好分散。

The coordinated control of melting reaction and the decomposing reaction of insoluble sulfur(IS)during the compound mixing was studied.The result of DSC analysis showed that the fastest melting rate of IS was at the temperature of 124.0℃,and the fastest decomposing rate of sulfur was at 132.9℃.The HAAKE rheology instrument was used to simulate the compound mixing process.When the inner wall temperature of the rheology instrument(temperature at mixing start)was 90~95of natural rubber/IS blend was well dispersed without decomposition.