稀土催化系统产生的丁二烯橡胶具有较高的分子链规则性和最高的摩尔尼粘度，表明分子链具有一定量的长链分支，表明线性较高。另外，镍系列的分子量分布比稀土系列的分子分布窄。
By comparison, the rare earth catalyzed polymerization of butadiene rubber has a high cis structure, less branched, no gel, so it has a good linear structure, known as high dimensional regularity of butadiene rubber.It can produce strong crystallization under the action of stretching, that is, with "stress crystallization ability, which gives rare earth butadiene rubber high self-viscosity, good tensile properties and advantages of abrasion resistance和抗疲劳性，是制造高性能轮胎的第一个橡胶。