1,3-Pentadiene is a relatively active cationic monomer, but there are many side reactions in its polymerization system, such as chain transfer, cyclization, cross-linking, etc. Therefore, the PD cationic polymerization initiated by Lewis acid such as AlCl3 is not completely converted, the polymer molecular weight is low, and a large amount of gel is produced. It has been reported that the TMSCl/AlCl3 system has high initiation activity, and the PD polymerization reaction initiated by it has a high conversion rate and polymerization rate, but TMSCl has no obvious effect on the gelation phenomenon.