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稀土元素组成的Ziegler-Natta型催化剂,其相态常受体系中Cl/Nd克原子比所制约,仅在Cl/Nd≤2克原子比时呈均相态。最近发现一类新型催化体系,可在较宽Cl/Nd下保持均相态,如以Me_2SiCl_2(二甲基二氯硅烷),烯丙基氯等为第三组份所组成的体系。为
The Ziegler-Natta catalyst composed of rare earth elements is often controlled by the Cl / Nd atomic ratio in the system, and is homogeneous only when Cl / Nd is less than or equal to 2g atoms. Recently, a new type of catalysis system has been found, which can be homogeneous under a wide range of Cl / Nd, such as the system composed of Me_2SiCl_2 (dimethyldichlorosilane) and allyl chloride as the third component. for