采用核磁共振碳谱(13C-NMR)方法研究了高温聚合所得聚丙烯端基的结构.研究表明,聚合时加入改性甲基铝氧烷,所得聚丙烯端基中并丁基含量会显著提高.这表明,改性甲基铝氧烷参与链引发反应,形成新的活性中心.研究结果还表明,100℃聚合时链转移反应以向烷基铝转移反应为主;而120℃聚合时链转移反应有β-H消除反应和向烷基铝转移反应,以前者为主.
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