本文用自旋捕捉技术与ESR相结合方法,系统研究了放电管直径及水含量对低压下脂肪醚气相微波放电分解产生自由基的影响。表明:随着放电管直径减小,放电时碳化现象加重,H·原子寿命变短;含水量加大,碳化剧烈。并根据其放电机理,对以上现象发生的原因进行一定的探讨。 In this paper, the effect of discharge tube diameter and water content on the free radical generation by vapor phase microwave decomposition of aliphatic ethers was systematically studied by the combination of spin-capture and ESR. It shows that as the diameter of the discharge tube decreases, the carbonation phenomenon increases during discharge, and the lifetime of H · atoms becomes shorter; the water content increases and the carbonization becomes severe. And based on the discharge mechanism, the reasons for the above phenomenon are discussed.