When AA was polymerized in the absence of GeCl4 ,five ESR spectrum lines were obtained , and three ESR spectrum lines were obtained in the present of GeCl4 .The difference between the coupling constants of this two case was about 30% .

• AA聚合时,不加GeCl_4得5重谱线,加入GeCl_4则得到3重谱线,两种情况下,偶合常数A相差约30%25。