NC在醇醚混合溶剂中的溶解速率

Dissolution Rate of Nitrocellulose in Ethanol-aether Mixed Solvent

假设溶液黏度与溶解度存在线性关系、溶解速率即为黏度-时间曲线的斜率,研究了不同情况下NC在乙醇和乙醚混合溶剂中的溶解速率。实验结果表明,黏度-时间曲线的斜率可以作为溶解速率;NC的含氮量越高,在乙醇和乙醚混合溶剂中的溶解速率越小。当乙醇和乙醚的体积比分别为1∶1和3∶2时,2#NC和3#NC的溶解速率最大;当乙醇和乙醚的体积比为3∶2时,随着温度的升高,3#NC溶解速率明显增大。

Assuming that there is a linear relation between dissolution rate and dissoluability and setting the slope of the viscosity--time curve as dissolution rate,the dissolution rate of nitrocellulose（NC） in ethanol aether mixed solvent in different instance was studied. The experimental results indicated that the slope of viscosity--time curve can be used as dissoution rate and the larger the nitrogen content in NC, the lower the dissolution of NC in ethanol-aether mixed solvent. When the proportion of ethanol-aether mixed solvent is 1 ： 1 and 3 ： 2, 2^# NC and 3^# NC has largest dissolution rate, respectively. As the temperature rose the dissolution rate of 3^# NC increased obviously when the proportion of ethanol-aether mixed solvent was 3 ： 2.