Mandarin:
阳离子开环聚合 (yáng lí zǐ kāi huán jù hé)

Explanation in English Language (EN):
This is a specialized form of cationic polymerization where the monomer is a cyclic compound. The polymerization proceeds by the initial formation of a cationic species, which then attacks the cyclic monomer, opening the ring and creating a new reactive center. This process continues as the newly formed cationic center attacks another cyclic monomer, propagating the chain. This method is often employed to synthesize important polymers like polyethers, polyamides (nylons), and polyesters.

Explanation in Mandarin (ZH):
这是一种特殊形式的阳离子聚合，其中单体是环状化合物。聚合反应首先形成阳离子物质，然后攻击环状单体，打开环并产生新的反应中心。随着新形成的阳离子中心攻击另一个环状单体，该过程继续进行，从而扩展链。该方法通常用于合成重要的聚合物，如聚醚、聚酰胺（尼龙）和聚酯。

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