Oligomer of 1-decene was synthesized with Ziegler-Natta catalyst consisting of TiCl4, AlCl3, Et2AlCl, and SiO2 used as support. The effects of temperature, time, ratio of Al/Ti, and concentration of Ti on oligomerization behaviors were investigated. The results showed that the catalyst system was desirable for oligomerization of 1-decene with good catalytic activity, 153.4 kg oligomer/mol Ti h, under typical conditions. The oligomer obtained was characterized with GC-MS, GC, and C-13 NMR methods. The results indicated that the oligomer was of a mixture consisting of di-, tri-, tetra-, and pentamer. The C-13 NMR data also implied that chain propagation of this oligomer involved primarily head-to-tail 1, 2-insertions, as well as head-to-head and tail-to-tail 2, 1-insertions. (c) 2006 Wiley Periodicals, Inc.