四溴乙烷变质原因的探讨及其稳定剂的选择

本文根据四溴乙烷分子中化学键的离解能数据估算反应活化能,分析得出:在常温及弱光照射下,四溴乙烷就会逐渐变质。通过色质联用波谱分析,确定了四溴乙烷变质过程中生成的主要产物,证实了本文分析的四溴乙烷变质的主要原因,从而找出选择稳定剂的原则。通过稳定试验和空白试验的色度和pH值对比及色谱分析证明:微量稳定剂就能使四溴乙烷在常温下稳定两年。

INVESTIGATION OF THE REASON OF THE DETERIORATION OF 1,1,2,2-TETRABROMOETHANE AND THE SELECTION OF ITS STABIMZER

This article estimates the activation energies of some reactions according to the data of the dissociation energies of the chemical bonds in the molecule of 1,1,2,2-tetrabromoethane. The result of the research is as follows:1,1,2,2-tetrabromoethane deteriorates gradually under the illumination of weak light at ordinary temperature.Through GC-MS analysis, the main products which are formed during the deterioration of the 1,1,2,2-tetrabromoethane are affirmed and the principal reason of its deterioration is confirmed. Thus the principle for the selection of the stabilizer is found. Through GC analysis and the comparison of the APHA color and pH values for stability tests and blank tests, it has been proved that a little of stabilizer can keep the 1,1,2,2-tetrabromoethane steady for two years at ordinary temperature.