The olefins, such as ethylene and propylene, are formed from petroleum gas or from cracking of larger hydrocarbons. Ethylene is used to make polyethylene e.g.

烯烃主要是来自石油气或大分子的碳氢化合物裂解，如乙烯，丙烯。

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Modified chlorinated polyethylene (CPE) resins are the copolymer of ethylene, vinyl chloride and rubber.

改性氯化聚乙烯（CPE）树脂是乙烯、氯乙烯及橡胶的共聚物。

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Examples of homopolymers are natural rubber, whose monomer is isoprene, and polyethylene, whose monomer is ethylene.

均聚物的例子有单体为异戊二烯的天然橡胶以及单体为乙烯的聚乙烯。

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The purest ethylene and polyethylene play for investors is Nova Chemicals, says Fitsch.

FORBES: Magazine Article

The purest ethylene and polyethylene play for investors is Nova Chemicals (nyse: NCX - news - people ), says Fitsch.

FORBES: Get Rich Off Plastics

The Olefins segment manufactures and markets ethylene, polyethylene, styrene and associated co-products.

FORBES: #1,487 Westlake Chemical