Copolymerization of 1,3-butadiene with various types of phenyl substituted 1,3-butadiene derivatives, including ( E )-1-phenyl-1,3-butadiene (PBD), 1-phenethyl-1,3-butadiene (PEBD), 1-(4-methoxylphenyl)-1,3-butadiene ( p -MEPBD), 1-(2-methoxylphenyl)-1,3-butadiene ( o -MEPBD) and 1-(4- N , N -dimethylaminophenyl)-1,3-butadiene ( p -DMPBD), by using a coordination polymerization system of CpTiCl 3 /MAO is reported herein. Comonomers PBD and PEBD can be copolymerized with 1,3-butadiene in a large range of comonomer feed ratios (0-44.6% for PBD, 0-30.2% for PEBD), affording the targeted copolymers with well-controlled comonomer incorporations, molecular weights, polydispersities and microstructure, whereas no corresponding copolymer products were obtained under identical conditions when p -MEPBD, o -MEPBD and p -DMPBD were employed. Moreover, different polymerization parameters, including temperature, Al/Ti ratio, etc. , posed a significant influence on the polymerization behaviors, as well as the properties of the resultant copolymers. Microstructure analysis by NMR spectra revealed high 1,4-selectivities of the catalysts, and the glass transition temperature ( T g ) of the resulted copolymer was found to be highly dependent on the incorporation content of the comonomers; with an increasing comonomer content, a gradually increasing T g was demonstrated.