A polymer in which the repeating unit contains two carbon atoms linked by an oxygen atom 聚醚一种聚合物,其中重复性的单位含有由一个氧原子连结的两个碳原子
The length of the polymer chain is specified by the number of repeat units in the chain . this is called the degree of polymerization 聚合物链的长度可以用链中重复单元数来表示,叫做聚合度。
In order to facilitate the analysis of the minimum repeated unit cell , the following geometrical characteristics were assumed : ( a ) all the yarn segments parallel to a diagonal direction or braiding axis in all unit cells lying in the same layer of the perform are treated as forming inclined lamina or horizontal lamina after matrix impregnation , ( b ) fibers were considered to be straight and unidirectional 以精确的复合材料单胞模型为基础,从最小的可重复的单胞入手,对单胞的结构进行简化分析,认为纤维是平直的,将单胞中的四个不同方向的纤维束看成是空间四个不同方向的单向复合材料,纤维束的性能可以等价于单向复合材料的宏观性能。
An essential concept which defines polymer structure, the repeat unit or repeating unit is a part of a polymer chain whose repetition would produce the complete polymer (except for the ends) by linking the repeat units together successively along the chain, like the beads of a necklace.Rudin p.