“链段”是高分子科学中经常应用的一个较重要的名词,但它的明确含义,却未见阐述。给人的印象是,只要是大分子链的某一段就称为“链段”。加上在不同的情况下,同一高聚物,链段值也有长有短,更使人觉得链段这个词有点随意。但掌握好“链段”这一概念,是学好高分子物理、物化的重要关键之一。虽然在一些场合,“链段”可用于泛指链的某一段,但应让学习者懂得,它是应该有明确的含义的。 “Segment” is one of the more important terms frequently used in polymer science, but its definite meaning has not been elucidated. The impression is that as long as a certain segment of the macromolecular chain is called “segment.” Plus in different circumstances, the same polymer, segment values ​​also have long and short, more people feel that the word segment is a bit random. However, mastering the concept of “link segment” is one of the key points to learn from the physics and materialization of polymer physics. Although in some cases “segments” may be used to refer to a certain segment of the chain, it should be made clear to learners that it should have a clear meaning.