乙烯-乙烯醇共聚物(EVOH)是目前世界三大阻隔树脂之一，工业生产可分为聚合、醇解两步。
Ethylene vinyl alcohol (EVOH) copolymer is one of three largest barrier resins in the world. Its industrial production process comprises two steps, i. e. copolymerization and alcoholysis.
以尿素-甲醛为壁材，四氯乙烯为芯材，通过两步原位聚合法和一步原位聚合法制备微胶囊。
Microcapsules were prepared through two-step and one-step in situ polymerization method, with urea-formaldehyde as wall material, and tetrachloroethylene as core material.
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