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本文报道了用二异丙基黄原酰化二硫做光敏引发剂的2-氯丁二烯-[1、3]本体聚合过程中存在着外磁场效应;得到了单体转化率随外磁场强度增加而增加,经过一最高点后略有下降的实验结果。为了解释有关的实验现象,作者提出了在外磁场存在下聚合反应中链引发是整个反应的控制步骤,光敏引发剂光分解产生的自由基对,由于塞曼分裂使叁线态的T±能级与单线态能级分离,使自由基对叁线态与单线态之间的级间窜越T±→S受阻,而导致引发速率提高的假设。
In this paper, the external magnetic field effect of 2-chlorobutadiene- [1,3] bulk polymerization using diisopropylxanthogenyl disulfide as photoinitiator was reported. The conversion of monomer with the external magnetic field Increased intensity increases, after a certain point after a slight decrease in the experimental results. In order to explain the relevant experimental phenomena, the authors propose that the chain initiation in the polymerization reaction is the control step of the overall reaction in the presence of an external magnetic field. The free radical pairs generated by photodegradation of the photoinitiators, the T ± level of the triplet state And the separation of the singlet energy level, so that the radicals between the triplet and the singlet state transition between T ± → S blocked, leading to the assumption that the rate of increase.