The article examines an effct of allylhalide

as chain transfer agent

upon the rate of butadiene polymerization

polymer molecular weight and activity energy in the presence of MoCl3(i-OC5H11)2-(i-Bu)2-AlO and hydrogenated gasoline assolvent. And the chain trasfer constants of allylhalide was induced. The results show that allylbromide has little effect on the rate of butadiene polymerization

however allylchloride and allyliodide result in the drops of the polymerization rate-Molecular weight decreases rapidly as the increase of the amount of allylhalide. In the presence of allybromide

according to Arrhenius'equation

the apparent activity energy is abtained to be 63.6kj/mole

a little more than that there is no allylbro-mide.