Initiation systems containing amine component are important and well-known in the free radical polymerization of vinyl monomers．Two main types of amine-containing initiation systems were studied in this work．In the case of MMA polymerization initi-ated by BPO-amine (DMT，DHET，DMA) redox systems，it was found that the poly-merization rate and colour stability of polymer for different amine systems were in the following order：DMT≈ DHET>DMA．Thus．BPO．DMT and BPO．DHET are effective intitators．In the case of MEMA polymerization by amine(DMT．DHET

DMA，MBDMA) alone，it was found that the polymerzation rate and percentage of con-version for these different amine systems were in the following order：DMT≥DHET> DMA>MBDMA．The polymerization rate and percentage of conversion also increased with the increase of DAIT coneentration．From the kinetic investigation the rate equa-tion of Rp=K[DMT]1/2 [MEMA]3/2 was obtained，and the overall activation energy of polymerization was calculated to be 34.3 KJ mol-1 (8.2 Kcal mol-1)．Moreover，the polymerization of MEMA was strongly inhibited by hydroquinone．All these evidences indicated that the polymerization of MEMA by DMT alone also follows the typical radical polymerization scheme．and the mechanism of the polymerization was thus proposed．