以下为句子列表：
英文: Metallocene branched polyethylenes prepared by oligomerization catalysts at different ratio vary in physical properties, and the ratio of cocatalyst to oligomerization catalyst of 8.72:1 gives good physical properties and processing properties.
中文: 以不同配比齐聚－共聚催化剂聚合的茂金属支化聚乙烯的基本物性不同，当共聚／齐聚催化剂配比为8.72:1时，基本性能和加工性能较好。
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英文: Studies on Olefin Polymerization Catalyzed by Metallocene/Cocatalyst (Containing Boron Compound) Catalytic System
中文: 茂金属/含硼化合物催化体系催化烯烃聚合的研究
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