乙二醇200（peg 200）与其他聚乙二醇的性能差异分析

大家好，今天咱们来聊一个听起来有点“高冷”的东西——聚乙二醇（polyethylene glycol，简称peg）。尤其是它家族中的一个小成员：乙二醇200（peg 200）。

如果你是个化学小白，可能听到这些名字就头大；如果你是化工或制药行业的从业者，那你一定对它们耳熟能详。但不管你是谁，这篇文章都会让你从“一脸懵”到“原来如此”，甚至还能在饭桌上跟朋友吹两句：“哎，你懂peg不？”

一、先来个简单的自我介绍：什么是peg？

聚乙二醇是一类由环氧乙烷聚合而成的水溶性高分子化合物，英文名叫polyethylene glycol，缩写就是我们常说的peg。它的结构其实挺简单：重复的-o-ch₂-ch₂-单元，像糖葫芦一样串起来。

根据聚合度不同，peg有各种型号，比如：

其中，peg 200其实就是我们今天要重点介绍的主角。

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