A low density polyethylene produced by a low pressure process, by Ziegler-Natta polymerization or by use of the Phillips process.

采用低压过程，齐格勒·纳塔聚合或菲利浦斯公司工艺生产的一种低密度聚乙烯。

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Also provided is a process for narrowing the molecular weight distribution of a polyolefin comprising contacting an olefin, a Ziegler-Natta catalyst and a compound specified herein.

还提供了一种使聚烯烃分子量分布变窄的方法，包括使烯烃、辛格勒·纳塔型催化剂和本文指定化合物相接触。

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Also provided is a process for narrowing the molecular weight distribution of a polyolefin comprising contacting an olefin, a Ziegler-Natta catalyst and a compound specified herein.

还提供了一种使聚烯烃分子量分布变窄的方法，包括使烯烃、辛格勒·纳塔型催化剂和本文指定化合物相接触。

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