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今天同大家談談高分子化学領域中最矇矓最不清楚的結构問題。 首先介紹一下什么是結构和結构单元。以土壤为例,用X-射线結构分析的方法可以找到其中Al,O,Si等原子分布的位置和各原子间的相互作用关系,即硅酸盐晶胞內的詳細結构。不过知道了土壤中鋁、氧、硅的結构并不能因此而告訴我們砖的結构,两者同为硅酸盐,但具有截然不同的性貭。这是因为X-射线結构分析的方法只能告訴我們小尺寸內的微观結构,而不能告訴我們宏观尺寸的結构。另一方面,宏观一些的研究可以用胶体化学的观点把土壤当作胶
Today I will talk about the most obscure structural problems in the field of polymer chemistry. First of all, what is the structure and structure unit? Taking soil as an example, X-ray structure analysis can find the distribution of atoms such as Al, O, Si and the interaction between atoms, that is, the detailed structure of silicate intragranular. However, we know that the structure of aluminum, oxygen and silicon in the soil does not tell us the structure of the bricks. Both are silicates, but have quite different properties. This is because the X-ray structure analysis method can only tell us the microstructure within the small size, but can not tell us the structure of the macro-size. On the other hand, macroscopic studies can treat soil as a glue from the viewpoint of colloid chemistry